KR101035497 Method for Total Monitering on-line Health of the Generator

KR101035497 Method for Total Monitering On-line Health of the Generator

KR101035497 (B1) - METHOD FOR TOTAL MONITERING ON-LINE HEALTH OF THE GENERATOR

Inventor(s): CHUNG SUNG CHEUL [KR]; SONG SANG WOOK [KR]; KIM GU HYUN [KR]; CHOE YONG GI [KR]; KIM SOO GI [KR]; JEONG SEOK YUN [KR] +

Applicant(s): KOTEC [KR]; KOREA SOUTH POWER CO LTD [KR] +

Classification:

- international: G01R31/34; G08B25/01; G08C19/00

Application number: KR20100079169 20100817

Priority number(s): KR20100079169 20100817

Abstract

The invention relates to the soundness online integration monitoring method of the generator which the soundness of the generator can watch with it is safe watching the operating state of the generator at remote in aggregate.

For this, the invention relates to the fixed the time interval all kinds of the detection sensors (the generator axis voltage / shaft current detection sensor, the stator part discharge detection sensor, the rotor layer short detection sensor, the stator Endwinding vibration sensor) of the generator is set up. And transformed to the Data necessary for the monitoring by the algorithm (the user setting parameter) and analysis the value the respectively is obtained in the DAQ Unit of the PC base of the plural number called data acquisition unit from sensors after doing the digital signal value the conversion, the detected analog signal value and the Data necessary for the monitoring by the algorithm (the user setting parameter) and analysis the value the respectively is obtained in the DAQ Unit of the PC base are transmitted to the high position Server through the communication line. Moreover, in the Server, the failure cause is analyzed estimation through the MMI (Man Machine Interface) and the server operating program indicates the Data which accepts from the DAQ Unit of the PC base in the form of the various Event Datas including all kinds of the Graphs, the Chart and report etc. And estimation has the shaft current and short-circuit current according to the abnormality. It is connected to the Server and the monitoring and analysis become possible in the remote location.

Therefore, according to the invention, in remote, with watching the operating state of the generator doing to the high voltage rotating machine in aggregate the soundness of the generator together can watch and it has the unique effect contributing to the stable operation of the generator

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Scope of Claims

Claim 1:

In that case called the output terminal / contactless (SSC) of the generator the second detection sensor watching the partial discharge whether or not of the stator winding of the generator is the contact (EMC) the first detection sensor watching the axis voltage / shaft current of

generator as to the soundness online integration monitoring method of the generator doing to the high voltage rotating machine sets up in the rotary shaft of the generator among 2 in the brush type of the structure is the first digital to analog converter Q unit of 1st step of detecting the abnormality the third detection sensor and the fourth detection sensor watching the vibration whether or not of the stator terminal coil of the generator set up in the stator slot of the generator it watches: and the PC base converting and controls to all kinds of event datas necessary for

first detection sensor to the fourth detection sensor and monitoring to 3rd step of confirming the presence of the first digital to analog converter Q unit of the PC base to data signal in which the fourth DAQ unit is detected to 1~10sec cycle from the first detection sensor to the fourth detection sensor in the second step and :

second step that the respective connection ㆍ connect the fourth DAQ unit to 1:1 and :

3rd step. After 7th step which the abnormality is generated in 4th step converted into all kinds of event datas necessary for the algorithm (or, the user setting Parameter) which processes the conversion ㆍ as the digital signal if data signal exists and is stored in memory according to the DAQ

unit of the PC base and monitoring it determines it analyzes the comparison ㆍ and :

4th step in at least one detection sensor of the first step ; all kinds of event datas necessary for the monitoring transmitted from 5th step which converts and controls through the communication converter to the standard protocol signal in order to transmit different signals with the main control room and :

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5th step to the main control room of the multiple event datas generated in 4th step collectively indicate the prescribed application program (MMI) for the user input, 6th step analyzing the trouble occurrence reason through the server operating program with the estimation ㆍ and analyzed :

data through the server and monitor in three dimensions ; and it gradually warns indication through the signal of computer / alerter and the server transmit with the scene paper watch according to the analyzed data value as described above. And

6th step. A soundness online integration monitoring method of the generator comprising the steps of: the switch of the discharge circuit part is switched in the automatically with the first digital to analog converter Q unit of the PC base to the fourth DAQ unit and server and the shaft current and short-circuit current are bypassed as the instantaneous discharge and 9th step of removing passively, the discharge or the failure cause it bypasses is included for the fixed time;

is synchronized through the SSI (System Synchroniztion Interface) bus of the first digital to analog converter Q unit of the PC base to the fourth DAQ unit and software with memory and the reference value of the signal of computer / alerter of the user setting parameter of 4th step and 7th step can the reference value the calibration; and the reference value of the signal of computer / alerter and user setting parameter is set to memory in advance in order to convert and control to all kinds of event datas necessary for the monitoring and analysis the signal detected from the first detection sensor to the fourth detection sensor and the reference value stores.

Claim 2:

As for claim 1, the soundness online integration monitoring method of generator called the brush poor contact, the bearing inferior insulation over the grounded system, the shaft and bearing friction, and the failure cause by the axis voltage / shaft current, partial discharge, layer short, terminal coil vibration according to the deterioration by the long time operation of the power outage voltage generation whether or not by the bearing seal arcing over the exciter, over the winding and core and

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wet steam and generator and stress and dielectric breakdown and brush fault generated in all kinds of event datas of

4th step is the generator according to the detected value of the first detection sensor to the fourth detection sensor.

Claim 3:

Technical Field

The invention relates to the soundness online integration monitoring method of the generator, more specifically to the soundness online integration monitoring method of the generator which the instantaneous discharge is made according to the abnormality with nots affecting the control system and it is safe watching the operating state of the generator at remote in aggregate and the soundness of the generator watches.

Background Art

Recently, the fluence is enlarged as much as the control facility which controls the power plant to the acceleration of the industry development with the increase of the generator unit capacitance and watched the reliability whether or not of the control facility more controls the stable operation of the whole power plant with acceleration by making into cutting edge.

While the monitoring / diagnostics of the industrial facility depending on the capability and experience of the industrial site person in charge for that rapidly develops according to the electron, and the development of the information technology all kinds of the monitorings the / diagnostic system safe and scientific contends for front and the monitoring / diagnostics is developed and the monitoring / diagnostics is used in the cost down purpose as well as the scientific movement of the power plant administration.

The axis voltage / shaft current, of the generator and the technology watching the stator part discharge of the generator and rotor layer short and stator Endwinding vibration has the online

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monitor system of the generator. Firstly, in the generator in which the axis voltage / shaft current of the generator is rotated with the rotation of the turbine, the rotary shaft refers to that the voltage / current is generated with the induction magnetic field in the rotary shaft of the generator. Moreover, as the stator part discharge of the generator the generator drives in the long term it is shy it electricals the insulating blazing fire is generated due to the compound depletion it environmentals mechanical. In the area in which the epoxy is many due to the thermal degradation due to the connectivity reduction between the mica tapes, while the insulating blazing fire is progressed in the weak point of the slot exit which even very much receives the caused abrasion and the mechanical tension for the coil movement within the generation of air gap, and the mica tapes due to the electrical the deterioration with cracking and void formation, and the mechanical vibration and the partial discharge occurs the high-frequency current pulse is generated. Moreover, the rotor layer short of the generator the insulation between the layer-wound is destroyed the armature reaction (the phenomenon that the magnetic flux of the armature winding affects the magnetic flux of the field winding) of the generator rotor and the rotor layer short occurs. And the nonstationary oscillation due to the unbalance of the magnetic flux and the asymmetrical heat generation are generated if the layer short of the rotor winding of the generator is generated. And in case of the stator terminal coil (Endwinding) vibration of the generator is the most of field winding short circuits the field winding short circuit, it affects in the excitation system of the generator and the abnormal mechanical vibration can be generated. Therefore, the stability is important to diagnose the generation of short within the rapid coil and correct position in order to reduce the economic loss and maintain the stability of the system. The method of diagnosing this it consecutively watches was the vibration generated by the initial, mainly, the short circuit used but because the reason of the generator vibration was various the reason had the disadvantage that the correct diagnosis was difficult. Presently, there can be the direct methods measured the air-gap magnetic flux through the pickup coil among method of confirming the symmetric authorizing and is generated using the pickup coil of the magnetic flux and the operation in method of watching the change it indirectly measures and the field winding as the major diagnosis method for being proposed. It is difficult to sense because there is no change in case of the short circuit which accurately can sense the short circuit in case impedance remarkably changes due to the short circuit in which the method of measuring impedance is intermittent but is continued. In the method of confirming the symmetric of the magnetic flux according to the AC current application is the stopping state the operation of the generator, because of performing the diagnosis the economic loss due to that is serious. It has the disadvantage that the early stage installation cost is very much the air-gap magnetic flux required among the operation because the generator in which the reliability is till now evaluated as the highest method but the direct method for detecting is yet equipped with the pickup coil of the air-gap magnetic flux is rare. And recently, there can be the sensor technic measuring the oscillation cycle of the comprised high voltage rotating machine like the stator using the fiber-optic cable accelerating field and End-windings due to the electrical the mechanical stress as the foreign technique. While this sensor runs over the non-conductive it electro-magnetics it is not influenced in conduction and disturbance. This sensor is designed so that the high voltage , and the

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celsius 90 be used in the dangerous with high hydrogen density etc environment in the ambient temperature described in the above and atmosphere. Therefore, in the present invention, this sensor technic is improved with the application ㆍ and it has localization and the vibration toward the stator terminal coil of the generator can be watched.

In the meantime, the special brush made of the semi-permanent copper braid of the abrasion resistance the contact area about the rotator is broad as to the generator axis voltage / shaft current online monitor system in which the rotor rotates the state of the axis voltage / shaft current is monitored in the steadily by the online real-time is and controls converted with the coupling for connecting the , firstly, the turbine according to the generator axis voltage / shaft current on-line monitoring system, of (B1) KR10-0920895 B (2009. 10.09) and generator to all kinds of event datas necessary for the user setting parameter which detects the axis voltage / shaft current of the generator by using as the sensor among 2 and is the input value of the A/D converter changing the signal of the axis voltage / shaft current detected from the detection unit to the digital signal and the detection unit which the shaft current detects through the classification machine (Shunt) of the low resistance stored in the memory (SRAM). And monitoring it analyzes the comparison · for test The generator axis voltage / shaft current online monitor system comprising client system, and the discharge circuit part consisting of the application program (Man Machine Interface: MMI) for the user input represented by the various types including the graphic, the chart and report etc. the cause of generation of the axis voltage / shaft current is assumed and it analyzes and storage, the server and the monitor, and the alerter is proposed. The application program (Man Machine Interface: MMI) for the user input represented by the various types including the graphic, the chart and report etc. the cause of generation of the axis voltage / shaft current is assumed and it analyzes and storage stores server operating program of generator corresponding to the monitoring and analysis all kinds of event data, and all kinds of event datas transmitted from the DAQ unit: of the PC base for transmitting the result with the client system through the communication line and DAQ unit of the PC base. The server and the monitor in three dimensions displays and controls analyzed data in the monitor. The alerter gradually warns according to the analysis whether or not of the axis voltage / shaft current value and the field Indecation watching the various event information at field with reception. The discharge circuit part is switched with the input unit of the client system and which bypasses the axis voltage / shaft current from the passively as the discharge or which the automatically is switched with the server of the client system and bypassed as the discharge.

Moreover, it is the system monitoring the partial discharge and layer short generation whether or not of the high voltage rotating machine in the online according to the partial discharge of the high voltage rotating machine of (B1) KR10-0728762 B (2007. 06. 14) and layer short online monitoring system

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The TCP / IP the signal conditioner, which changes the form and property of the output signal the second data acquisition unit accurately analyzes the weak output signal from the layer short detection sensor without the distortion it includes first and second data acquisition unit converted into data necessary for the layer short detection sensor: partial discharge detection sensor: layer short detection sensor, and the server collecting the partial discharge from first and second data acquisition unit and layer short generation event through the communication line and transmits with display and outside and the preamplifier, which amends the signal size attenuation it amplifies the transformed layer short signal size from the signal conditioner and the A/D converter, converting the corrected layer short signal into digital data from the preamplifier and the second CPU, which on the whole, controls the internal function of the second data acquisition unit and the layer short signal analyzed through apparatuses. First and second data acquisition unit converted into data necessary for the layer short detection sensor: partial discharge detection sensor: layer short detection sensor, is installed at the angular of the output terminal side of the stator of the generator or the generator and high-tension motor and senses the partial discharge whether or not of the stator winding the hour and analysis the detected sensing signal is acquired from the partial discharge detection sensor through the coaxial cable senses the layer short whether or not of the rotor winding it is installed at the generator stator. The online monitoring system of the high voltage rotating machine is proposed comprises the communication unit transmitting with the outside among the RS-232 and RS-422 communication method using one mode.

And it has the partial discharge of the high voltage rotating machine of (B1) KR10-0728761 B (2007. 06. 14) besides present patent technologies and layer short monitoring method, the rotor layer short automatic analysis method of the high voltage rotating machine of 10-0763613 A (2007. 10. 04), and the noise removing method in the partial discharge state monitoring system of the high-tension electricity facility of 10-0765449 A (2007. 10. 09) and apparatus thereof, and the partial discharge observation sensor of the high-voltage installation of 10-0799704 A (2008. 02. 01) and manufacturing method thereof.

But it develops only system having the function the technology and present patent technologies proposed with the applicant so far altogether partly watch the generator and is known to bureau ㆍ in and out it is not system summing up the generator system and collectively keeps an eye. It partials and it is till now used.

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In other words, the new integration monitoring system development can watch is comprehensively desperately the soundness required in remote having the interconnectivity the operating state of the high voltage rotating machine eccentric person generator. Reason for the dielectric breakdown of 1) inspecting windings of generator stator and short phenomanon accident of the rotor winding are in the tendency of increase. 2) It need the long-term recovery period in the generator dielectric breakdown while causing the generating power limitation due to the surprising malfunction and rotor generation of short, the performance degradation etc. 3) It has the concern which the vibration including the turbine by the generator axis voltage and generator bearing damage etc. is generated. 4) There can be the concern which caused affects in the axis voltage / shaft current generation, the stator part discharge, and the vibration of the stator terminal coil and rotor layer short as the Key Bar of the generator stator and fixed failure of the stator core gap, the Fixed Web Plate and Spring Bar gap, and the vibration of the stator terminal coil (Endwinding) due to the Floating Web Plate charm qualitative and electrical the central axis (Magnetic Center) inconsistency etc and allophone.

Therefore, the present invention is to provide the integration monitoring method for watching at a time it adds the vibration observation sensor functionally improved with the application ㆍ it is suitable for the integration monitoring method for watching to the vibration of the stator terminal coil (Endwinding) in which localization is not so far comprised in addition to the axis voltage / shaft current, independently carried out in the generator of the Tangchin heat power plant the stator part discharge, and the rotor layer short observation monitoring technology besides the applicant it is authenticated for the NEP (New Excellent Product) from the presently it already patent is registered with the applicant at the same time, it solves the problems, and the soundness online integration monitoring method of the generator which the soundness of the generator together can watch with watching in other words, the generator of the high voltage rotating machine at remote in aggregate.

Summary of Invention

Problem to be solved

The object of the invention is to provide the soundness online integration monitoring method of the generator which it is transformed to the Date necessary for the monitoring by the algorithm and analysis this it is the sensor value which stands with the stator part discharge within the axis voltage / shaft current, and generator and rotor layer short and stator terminal Keown (Endwinding) obtained in the DAQ Unit of the PC base of the generator generated by the induction magnetic field in the generator which to solve problems described in the above, is devised and is more specifically rotated as the invention relates to the soundness online integration monitoring method of the generator with

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the rotation of the turbine and it transmits with the high position Monitoring Server and the Date necessary for the monitoring by the algorithm and analysis this it is the sensor value which stands with the stator part discharge within the axis voltage / shaft current, and generator and rotor layer short and stator terminal Keown (Endwinding) obtained in the DAQ Unit of the PC base organize the MMI (Man Machine Interface) program it indicates in the form of the Event Data including all kinds of the Graphs, the Chart and report etc. and instantaneous discharge or the By-Pass function and in that way the instantaneous discharge is made according to the abnormality with it is safe watching the operating state of the generator at remote in aggregate and the soundness of the generator watches.

Means to solve the problem

In that case called the output terminal / contactless (SSC) of the generator the second detection sensor watching the partial discharge whether or not of the stator winding of the generator is the contact (EMC) the first detection sensor watching the axis voltage / shaft current of the generator as to the soundness online integration monitoring method of the generator doing to the high voltage rotating machine for achieving sets up in the rotary shaft of the generator among 2 in the brush type of the structure is the first digital to analog converter Q unit of 1st step of detecting the abnormality the third detection sensor and the fourth detection sensor watching the vibration whether or not of the stator terminal coil of the generator set up in the stator slot of the generator it watches: and the PC base converting and controls to all kinds of event datas necessary for the first detection sensor to the fourth detection sensor and monitoring to 3rd step of confirming the presence of the first digital to analog converter Q unit of the PC base to data signal in which the fourth DAQ unit is detected to 1~10sec cycle from the first detection sensor to the fourth detection sensor in the second step and the second step connecting the fourth DAQ unit to 1:1 and 3rd step the purpose. In 4th step converted into all kinds of event datas necessary for the algorithm (or, the user setting Parameter) which processes the conversion ㆍ as the digital signal if data signal exists and is stored in memory

according to the DAQ unit of the PC base and monitoring it determines it analyzes the comparison ㆍ and 4th step, when the abnormality is generated in at least one detection sensor of the first step all kinds of event datas necessary for the monitoring transmitted from 5th step which converts and controls through the communication converter to the standard protocol signal in order to transmit different signals with the main control room and 5th step to the main control room of the multiple event datas generated in 4th step collectively indicate the prescribed application program (MMI) for the user input, 6th step analyzing the trouble occurrence reason through the server operating program and analyzed data as described above through the server and monitor in three dimensions. And the switch of the discharge circuit part is switched with the first digital to analog converter Q unit of the PC base to the fourth DAQ unit and server and the shaft current and short-circuit current are bypassed after 7th step which gradually warns indication according to the analyzed data value as

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described above through the signal of computer / alerter and transmitted with the scene paper watch and 6th step as the instantaneous discharge. The soundness online integration monitoring method of the generator which it sets the reference value of the signal of computer / alerter and user setting parameter to memory in advance in order to convert and control 9th step of removing passively, the discharge or the failure cause it bypasses for the fixed time to all kinds of event datas necessary for the monitoring and analysis the signal which includes and the reference value are synchronized through the SSI (System Synchroniztion Interface) bus of the first digital to analog converter Q unit of the PC base to the fourth DAQ unit and software with memory and moreover, the reference value of the signal of computer / alerter of the user setting parameter of 4th step and 7th step can the reference value the calibration and is detected from the first detection sensor to the fourth detection sensor and it stores is provided.

Preferably, all kinds of event datas of 4th step may be the brush fault generated in the generator according to the detected value of the first detection sensor to the fourth detection sensor and brush poor contact, the bearing inferior insulation over the grounded system, the shaft and bearing friction, and the failure cause by the axis voltage / shaft current, the partial discharge, the layer short, the terminal coil vibration according to the deterioration by the long time operation of the power outage voltage generation whether or not by the bearing seal arcing over the exciter, over the winding and core and wet steam and generator and stress and dielectric breakdown.

Effects of the Invention

According to the soundness online integration monitoring method of the generator of the present invention, it has the effect as follows.

(1) Since the real-time integration monitoring is possible in the state where the high voltage rotating machine is the layer short of the partial discharge of the axis voltage / shaft current, of the generator doing to the high voltage rotating machine and stator and rotor, and the abnormality toward the vibration of the stator terminal coil (Endwinding) operated the failure potential of the generator doing to the high voltage rotating machine can be watched in advance.

(2) In remote the generator operating state of the high voltage rotating machine, with observing in aggregate since the soundness together can watch it can contribute to the stable operation of the power plant to the reliability insurance of the generator.

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(3) It prevents in advance from the generator due to the surprising malfunction of the generator stopping with the soundness online integration monitoring of the generator. Also it has the unique effect securing predictive maintenance data toward the critical part of the generator in advance.

Description of Embodiments

Hereinafter, the preferred embodiment of the present invention is illustrated by referring to attached drawings. Firstly, the reference numeral is added to the elements of each drawing. While as long as it is possible although it is indicated on the other drawing about same components elements it has the same reference numbers to noting although the prior art and same reference numbers are indicated the prior art has to interpret as the itself. Moreover, in describing the present invention, in case of being determined because of being cloudy the detailed description to the notice organization relating or the function the detailed explanation omits the gist of the present invention.

Hereinafter, specifically it describes the soundness online integration monitoring system configuration of the generator according to the preferred embodiment of the present invention with reference to the figures 1 through 4.

The core technology palatability for implementing the soundness online integration monitor system of the generator of the present invention includes the detection sensor (100), the signal processor (200), and the DAQ unit (300), the communication converter (400), the communication line (500), the main control room (600), the discharge circuit part (700) of the PC base, and the scene paper watch (800).

Firstly, referring to figures 1 through 3, the detection sensor (100) comprises the first detection sensor (110) to the fourth detection sensor (140).

The signal sensing the axis voltage / shaft current generation whether or not of the generator among 2 made of the copper braid the first detection sensor (110) is installed at the rotary shaft (10) of the generator in the means watching the axis voltage / shaft current of the generator using the special brush of the structure is detected. .(the denotation of fig. 6 110: photo of actual object reference).

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The signal in which the second detection sensor (120) is installed in the means doing the partial discharge of the stator winding of the generator with the monitoring (insulating state) in the stator (20) of the generator and watching the partial discharge whether or not of the stator winding is detected (the denotation of fig. 7 120: photo of actual object reference).

Here, the second detection sensor may be formed of the discharge sensor installed at the contactless (Stator Slot Coupler : SSC) is the stator slot it is installed at the output terminal of the generator in case of being the contact (Epoxy Mica Coupler : EMC).

The signal in which the third detection sensor (130) is installed in the stator (20) slot of the generator in the means watching the layer short of the rotor winding of the generator and watching the layer short whether or not of the rotor winding is detected (the denotation of fig. 7 130: photo of actual object reference).

The signal which is installed in the stator (30) bar of the generator and can do the vibration whether or not of the stator terminal coil (Endwinding) is detected to the means in which the fourth detection sensor (140) watches the vibration of the stator terminal coil (Endwinding) of the generator (the denotation of fig. 8 140: photo of actual object reference).

The signal processor (200) comprises the A/D converter (210) changing the analog signal detected from the first detection sensor to the fourth detection sensor to the digital signal and the buffer (Buffer) (220) doing the input value of the A/D converter (210) with the FIFO (FIFO).

Referring to figures 1 through 3, convert and control to all kinds of event datas necessary for the algorithm (user setting Parameter) which is data collected through the signal processor (200) changing the analog signal in which the DAQ unit (300) of the PC base is detected from the first detection sensor (110) to the fourth detection sensor (140) to the digital signal the consecutive stored in the memory (350) and monitoring it analyzes the comparison ㆍ for test.

Moreover, it may include to collect data detection value of the first detection sensor (110) to the fourth detection sensor (140) by unit of 1~10sec and convert and control to all kinds of event datas.

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Here, all kinds of event datas comprises the turbine according to the detected value of the first detection sensor to the fourth detection sensor, the brush fault generated in the generator, and called the brush poor contact, the bearing inferior insulation over the grounded system, the shaft and bearing friction, and the failure cause of the axis voltage / shaft current, the partial discharge, the layer short, the terminal coil vibration etc according to the deterioration by the long time operation of the power outage voltage generation whether or not by the bearing seal arcing over the exciter, over the winding and core and wet steam and generator and stress and dielectric breakdown.

Moreover, in order to convert and control to all kinds of event datas necessary for in the present invention, the monitoring and analysis the signal of the first detection sensor (110) to the fourth detection sensor (140) the first digital to analog converter Q unit (310) of the PC base to the software which does the synchronization between the memory (SRAM) (350) card and the calibration in the fourth DAQ unit (340) through the SSI (System Synchroniztion Interface) bus is provided in order to be stored in the memory (350) the reference value of the signal of computer / alerter and user setting parameter was organized.

In other words, the reference value of the signal of computer / alerter (630) and user setting parameter more included that it corresponded to the detected signal value with the operation function of the first detection sensor (110) to the fourth detection sensor (140) and the operation function was preset in the possible with the first digital to analog converter Q unit (310) of the PC base to the fourth DAQ unit (340) and synchronization and calibration (Calibration) memory unit (350) and the reference value of the signal of computer / alerter (630) and user setting parameter was stored.

CPU of the first digital to analog converter Q unit (310) of the PC base according to the embodiment of such invention to the fourth DAQ unit (340) can have the multi-function and it can expand through the slot.

The communication converter (400), with reference to fig. 2 is the first digital to analog converter Q unit of the PC base to the different signals which are inputted from the fourth DAQ unit may be referred to the apparatus for converting and controls to the standard protocol signal and transmitting through the communication line (TCP/IP) (500) with the main control room (600).

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Here, it is the trend that the industry device of the present age is connected to the network and the communication converter (400) monitors and controls many information in the central unit. And the adoption of the standardization protocol is essential in order to easily connect the instruments of the heterogeneous. It can connect to the network doing DNP3.0 called the standard protocol in which it does not invest many cost in order to implement the standardization protocol and it applies the industrial communication protocol converter and it easily can implement the standardization protocol and the industrial communication protocol converter is very much used in electricity and automation system, and the apparatus having the standard protocol the Modbus, the Lonworks etc. are implemented as the embedded with mount and is standardized.

Analysis all kinds of event data that is detected from the first detection sensor (110) to the fourth detection sensor (140) and the communication line (500) is processed with reference to fig. 2 may be referred to the internet protocol suite for transmitting information data with the server (610) of the main control room (600) through the communication converter (400). In the present invention, the TCP / IP (Transmission Control Protocol/Internet Protocol) communication method is used among the internet protocol suite called the communication protocol (the protocol) which gives and takes the information but in which computers are used in the internet. Moreover, data are transmitted between the first digital to analog converter Q unit (310) of the PC base to the fourth DAQ unit (340) and communication converter (400) using the recommended standard 422 (Recommended Standard-422) communication method.

The central supervisory control center (600) with reference to fig. 2 comprises graph, and the chart the cause of generation of all kinds of event datas necessary for the monitoring transmitted from the communication converter (400) is assumed and the cause of generation analyzes, the application program (Man Machine Interface: MMI) for the user input for indicating by the various types including the report etc, and the storage (650) which stores the server operating program, and server (610) and the monitor (620), which in three dimensions displays and controls analyzed data in the monitor integration and the signal of computer / alerter (630) which gradually warns indication according to the analysis data value.

Here, although not illustrated in the figure, the analysis control part (not illustrated) analyzing all kinds of event datas for the monitoring about the detected value of the first detection sensor (110) to the fourth detection sensor (140) is more included inside the server (610). Moreover, it is comprised that

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the field Indecation (800) in which the server (610) transmits data which are analyzed in order to watch to the internet user (820) and head office administrator (830) through the herb (810) further is included.

The discharge circuit part (700) is switched with the input unit (640) of the main control room (600) and the shaft current and short-circuit current are bypassed with reference to figures 1 and 3 and fig. 4 as the discharge or short-circuit current are switched with the first digital to analog converter Q unit (310) of the server (610) and PC base to the fourth DAQ unit (340) and the discharge or the by-pass is configured to be possible.

Here, the discharge circuit part (700) comprises the switch (710) and the R-C parallel circuit (720). And it is comprised as the number of first digital to analog converter Q units (310) of the first detection sensor (110) to the fourth detection sensor (140) and PC base to the fourth DAQ unit (340) and the automatically is switched with the input unit (640) and server (610) as manual and with being bypassed by ground as the discharge the shaft current and the short-circuit current which the condenser (C1) is charged according to the time constant (τ) progress of the R-C parallel circuit (720) comprise along the resistance (R2) (refer to Figure 4).

Hereinafter, specifically the system explains the soundness online integration monitoring method of the generator according to the preferred embodiment of the present invention with reference to 5.

According to a preferred embodiment of the present invention, it controls with the protocol digitizing the signal value inputted through all kinds of the sensors and is standardized in the client system at high speed the soundness online integration monitoring method of the generator can watch through the integration monitoring including the hour monitor and field Indecation etc. in three dimensions is provided.

Firstly, the first detection sensor (110) watching the axis voltage / shaft current of the generator has the output terminal / contactless (SSC) of the generator the second detection sensor (120) watching the partial discharge whether or not of the stator winding of the generator is the contact (EMC) it sets up in the rotary shaft of the generator among 2 in the brush type of the structure, i.e. the first step (S10) in which case sets up in the slot of the stator and in which the third detection sensor (130) and

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the fourth detection sensor (140) watching the vibration whether or not of the stator terminal coil of the generator set up in the stator slot of the generator and watches the layer short whether or not of the rotor winding of the generator detecting the abnormality.

1:1 the respective connection ㆍ the first digital to analog converter Q unit (310) of the PC base converting and controls to all kinds of event datas necessary for the first detection sensor (110) to the fourth detection sensor (140) and monitoring to the fourth DAQ unit (340) have the second step (S20).

The first digital to analog converter Q unit (310) of the PC base to the fourth DAQ unit (340) in the second step has 3rd step (S30) confirming the presence of data signal detected to 1~10sec cycle from the first detection sensor to the fourth detection sensor.

It has 4th step (S40) converted into all kinds of event datas necessary for the algorithm (or, the user setting Parameter) which processes the conversion ㆍ as the digital signal if data signal exists in 3rd step and is stored in the memory (350) according to the DAQ unit of the PC base and monitoring it determines it analyzes the comparison ㆍ.

Here, all kinds of event datas of 4th step comprises the brush fault generated in the generator according to the detected value of the first detection sensor to the fourth detection sensor, the brush poor contact, the bearing inferior insulation over the grounded system, and the shaft, and called the bearing friction, and the failure cause of the axis voltage / shaft current, the partial discharge, the layer short, the terminal coil vibration etc according to the deterioration by the long time operation of the power outage voltage generation whether or not by the bearing seal arcing over the exciter, over the winding and core and wet steam and generator and stress and dielectric breakdown.

In 4th step, when the abnormality is generated in at least one detection sensor of the first step in order to transmit the different signals of the multiple event datas generated in 4th step with the main control room (600) it has 5th step (S50) converting and controls through the communication converter (400) to the standard protocol signal.

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All kinds of event datas necessary for the monitoring transmitted from 5th step to the main control room has the prescribed application program (MMI) for the user input and 6th step (S60) analyzing the trouble occurrence reason through the server operating program with the estimation ㆍ.

The analyzed data as described above is collectively indicated through the server (610) and monitor (620) in three dimensions. And it has 7th step (S70) which gradually warns indication according to data value analyzed through the signal of computer / alerter (630) and transmitted with the scene paper watch.

It comprises 9th step (S90) in which the switch (710) of the discharge circuit part (700) is switched with the automatically after 6th step with the first digital to analog converter Q unit of the PC base to the fourth DAQ unit and server and in which guard operates the switch (710) of the discharge circuit part (700) through the input unit (640) of the main control room and which passively removes the discharge or the failure cause which bypasses the shaft current and short-circuit current the shaft current and short-circuit current after the instantaneous discharge or 8th step (S80): which bypasses and which the continuously watches for the fixed time and 7th step.

Moreover, in the embodiment according to the method of the present invention, the reference value implies to order to convert and control to all kinds of event datas necessary for the monitoring and analysis the signal which is synchronized through the SSI (System Synchroniztion Interface) bus of the first digital to analog converter Q unit (310) of the PC base to the fourth DAQ unit (340) and software with memory and the reference value of the signal of computer / alerter (630) of the user setting parameter of 4th step and 7th step can the reference value the calibration and is detected from the first detection sensor (110) to the fourth detection sensor (140) the reference value of the signal of computer / alerter and user setting parameter be set to the memory (350) in advance and store.

In the meantime, referring to Figure 6, the result monitored by the real-time about the axis voltage / shaft current of the generator by the first detection sensor (110) according to a preferred embodiment of the present invention is shown in terms of the various types including graph, the chart etc. on the integration monitor (620). That is, since the communication state LED , and ⑥ show the alert state LED the user easily confirms the fault section of the generator and ① the hour / analysis / emergency signal Window movement button , and ② the real-time monitoring value , and ③ the

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hourly transition graph , and ④ the transition graph , and ⑤ rapidly correspond to something in the near future. Moreover, the photo of actual object sensor which is mounted to the generator of the high voltage rotating machine and watches the axis voltage / shaft current is together shown.

Moreover, referring to Figure 7, it is the layer short state about the partial discharge about the stator winding of the generator by the second detection sensor (120) according to a preferred embodiment of the present invention and the third detection sensor (130) and rotor winding installed in the generator of the high voltage rotating machine and various observing hands including graph, the chart, the waveform etc. and the photo of actual object of the sensor which is in the operation is shown.

And referring to Figure 8, the Daehan vibration state is shown in the stator terminal coil due to the electrical mechanical stress of the generator by the fourth detection sensor (140) according to a preferred embodiment of the present invention to the various observing hands including graph, the chart, the waveform etc. And the photo of actual object in which the sensor which is improved with moreover, the applicant with the application ㆍ in order to be suitable for the integration monitor system and watches the vibration of the stator terminal coil of the keen generator in localization is adhered shows.

Referring to figures 1 through 8, the whole operation function about the soundness online integration monitoring method of the generator according to the preferred embodiment of the present invention, is as follows.

According to a preferred embodiment of the present invention, all kinds of the sensors (the generator axis voltage / shaft current detection sensor (110), stator part discharge detection sensor (120), rotor layer short detection sensor (130), stator terminal coil vibration sensor (140)) is set up in the output terminal of the generator and the output terminal has the step of transmitting via the TCP / IP communication line (500) to the high position Server (610) of the main control room (600) the step that each data the step detecting and detected analog signal value as described above in the DAQ Unit (310~340) of the PC base of the plural number called the apparatus for successively collecting data to the digital signal value after doing the conversion from the detection sensor (110~130) convert and control to the event Data necessary for the monitoring by the algorithm (user setting parameter) and analysis the value it is obtained, and the event data controlleding transformation transformation

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as described above in the fixed time interval (1~10sec) through the communication converter (400) having the standardized protocol signal. Moreover, in the Server (610), the step of building the MMI (Man Machine Interface) program have it indicates by the various types including all kinds of the Graphs, the Chart and report etc of the multiple PC bases are included and the main control room men in service and field use person analyze easily in remote with the monitoring. And the step can be included more through moreover, the discharge circuit part so that the monitoring and analysis become possible according to the abnormality through the instantaneous discharge or the step having with the By-Pass number and the field Indecation (800) connected to the Server in the remote location.

In this way, the soundness online integration monitoring method of the power generation edge of the present invention has the unique characteristic contributing to the stable operation of the generator the soundness together can watch it watches the operating state of the generator doing to the high voltage rotating machine at remote in aggregate.

The description described in the above illustratively explains the technical spirit of the present invention it is nothing but. If it grows up under the technical field in which the invention belongs the various corrections and deformation will be available in the range that it does not deviate from the intrinsic property of the present invention. Therefore, it is not but the embodiment disclosed in the invention limits the technical spirit of the present invention it is to explain. The range of the technical spirit of the present invention is not limited by this embodiment. It should be interpreted that the scope of protection of the present invention all technical spirits within that and the equivalent range it has to be interpreted by the lower part claims are included in the scope of protection of the present invention.

Brief explanation of the drawing

Figure 1 is a configuration diagram

which the soundness online integration monitor system shows to know the soundness online integration monitor system of the generator according to the preferred embodiment of the present invention Figure 2 is a block diagram

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showing the whole configuration of the soundness online integration monitor system of the generator according to the preferred embodiment of the present invention Figure 3 is a configuration diagram

which discharge circuit part show to be aware of the first digital to analog converter Q unit of the first detection sensor of the soundness online integration monitor system of the generator to the fourth detection sensor and PC base to the fourth DAQ unit and discharge circuit part according to the preferred embodiment of the present invention Figure 4 is a block diagram

for illustrating the discharge through the first digital to analog converter Q unit of the first detection sensor according to fig. 3 to the fourth detection sensor and PC base to the fourth DAQ unit and server or the By-Pass function Figure 5 is a flowchart

showing the soundness online integration monitoring method of the generator according to the preferred embodiment of the present invention Figure 6 is the graphic and photo of actual object

for the axis voltage / shaft current of the soundness online integration monitor system of the generator according to the preferred embodiment of the present invention is monitored Figure 7 is the graphic and photo of actual object

for the partial discharge of the soundness online integration monitor system of the generator according to the preferred embodiment of the present invention and layer short are monitored Figure 8 is the graphic and photo of actual object for the short-circuit winding (Endwinding) damage of the soundness online integration monitor system of the generator according to the preferred embodiment of the present invention and vibration are monitored

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