Training report by shubham sachan

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Training Report on Sub-Station

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<ul><li> SIX WEEKS SUMMER TRAINNING REPORT On TRAINING UNDER KESCO SUB-STATION Submitted by (Shubham Sachan) Registration No-11104846 Program-Electrical and Electronics Engineering Section-E3108 Under the Guidance of Pursottam Yadav (Junior Engineer) School of Electronics and Electrical Engineering Lovely Professional University, Phagwara, Punjab (June-July, 2014) shubham sachan </li> <li> DECLARATION I hereby declare that I have completed my six weeks summer training at KESCO, Tatya Tope Nagar Sub-station from 25/6/2014 to 24/6/2014 under the guidance of (Pursottam Yadav). I have declare that I have worked with full dedication during these six weeks of training and my learning outcomes fulfill the requirements of training for the award of degree of Electronics and Electrical, Lovely Professional University, Phagwara, Punjab. (Signature of student) Name of Student Registration no: Date: shubham sachan </li> <li> ACKNOWLEDGEMENT I sincerely thank to The General Manager, Kanpur Electricity Supply Authority, Junior Engineer (Training), Sub-Station Officer (Training) &amp; Training Coordinator. Who accepted my request for training without any hesitation and patiently answering all my queries, for providing clarity to my cluttered thought, They were instrumental in providing us good accommodation as well as very successful training at KESCO Tatya Tope Nagar Sub-Station. Last but not the least I am extremely grateful to all the Engineers and Staff members of Tatya Tope Nagar Sub-Station, and 132/33KV Armapur Sub-Station who could find time for us in spite of their busy schedule. Name of student: - Shubham Sachan Registration no.: - 11104846 shubham sachan </li> <li> OBJECTIVE OF TRAINING/PROJECT The main goal of this work is: How 33KV is step down to 11KV. To know about the Distribution of Electricity in area wise. Repairing of Electrical equipment like Transmission lines, Transformers etc. How to detect the faults and remove it as soon as possible. How electric connection is Provide to local user. shubham sachan </li> <li> Chapter 01- Organization Overview i. Company Profile ii. About 33/11 KV Sub-station Tatya Tope Nagar iii. Visit of 132/33 KV Armapur Chapter 02- Technology Learnt i. Electric Supply System ii. Types of Conductors iii. Transformer iv. Grounding System v. Controlling through Switch gear vi. Circuit Breaker Chapter 03- Motivation of the training Chapter 04- Learning Outcome Chapter 05- Gantt chart shubham sachan </li> <li> Table of Content 1. Company Profile 2. About 33/11 KV S/S Tatya Tope Nagar, Kanpur 3. Visit of 132KV Armapur S/S 4. Electric Supply System 5. Electrical S/S 5.1. Type of Substation i. Transmission Substation ii. Distribution Substation iii. Collector Substation 5.2. According to the service requirement 5.3. Classification of Substation 6. Conductors 6.1. Type of conductors i. AAC ii. AAAC iii. ACSR iv. ACAR v. ABC 6.2. Conductors Used in Substation Design 7. Transformer 7.1. Potential Transformer 7.2. Capacitor Voltage Transformer 7.3. Current Transformer 7.4. Auto Transformer 7.5. Power Transformer 8. Megger 9. Transformer Cooling 9.1. Air Natural cooling 9.2. Air Blast Cooling 9.3. Oil Natural cooling 9.4. Oil Blast Cooling 9.5. Forced Oil and Water shubham sachan </li> <li> 10. Transformer Protection 10.1. Conservator and Breather 10.2. Marshalling Box 10.3. Insulating Material 11. Transformer Tap Changing 12. Isolators 13. Grounding System 12.1 System Grounding 12.2 Neutral Grounding 14. Method of Neutral Grounding 13.1 Solid Grounding 13.2 Resistance Grounding 13.3 Reactance Grounding 13.4 Resonant Grounding 15. Capacitor Bank 16. Lightning Arresters 17. Main Bus-Bar 18. Wave Trap 19. Switchgear 20. Batteries 21. Fuse 22. Circuit Breaker 22.1. Oil Circuit Breaker 22.2. Vacuum Circuit Breaker 22.3. SF6 Circuit Breaker 22.4. Air Blast Circuit Breaker 23. Motivation 24. Gantt Chart 25. Learning Outcome 26. Reference 27. Abbreviation shubham sachan </li> <li> List of Figures Figure-No. Name of Figure Page-No Fig no 1 KESCO Logo 01 Fig no 2 33/11KV TT Nagar S/S 02 Fig no 3 Electric Supply System 04 Fig no 4 Type of Substation 05 Fig no 5 Out Door Substation 07 Fig no 6 Under-Ground Substation 07 Fig no 7 Pole-mounted Substation 08 Fig no 8 Current Transformer 10 Fig no 9 Potential Transformer 11 Fig no 10 Power transformer 12 Fig no 11 Breather 14 Fig no 12 Isolator 16 Fig no 13 Grounding 17 Fig no 14 Lightning Arresters 19 Fig no 15 Main Bus Bar 20 Fig no 16 Wave Trap 21 Fig no 17 Oil Circuit Breaker 23 Fig no 18 Vacuum Circuit Breaker 23 Fig no 18 SF6 Circuit Breaker 24 Fig no 19 Internal Structure of SF6 C.B 24 Fig no 20 Air Blast Circuit Breaker 24 Fig no 21 TT Nagar S/S View 26 shubham sachan </li> <li> 1 1. Company Profile Kanpur Electricity Supply Authority is the nerves system of Kanpur Electricity. KESCO is responsible for distribution and bulk supply of power in Kanpur and provides power to over 427,158 consumers, consisting of approximately 350,000 domestic, 73000 commercial, 8000 others including small, medium, large, and heavy power connections. Maintaining all the consumers through a network based on 61 electrical substation of 33/6.6 KV level, 333 feeders of 11 KV level and more than 3000 distribution transformers of different levels. KESCO head office is at Civil Lines. KESCO main moto is: Consumer Satisfaction Revenue improvement work Official Website of KESCO is www.kesco.co.in shubham sachan </li> <li> 2 2. About 33/11KV substation Tatya Tope Nagar Substation In T.T Nagar this substation is powered by 132KV S/S Barra-8 where 132KV is step down to 33KV and then fed to the Tatya Tope Nagar with the help of bus- bar this bus-bar is given to the Power Transformer into the primary side and this 33KV is further step down to the 11KV. With the parallel of 33KV bus-bar lightning arrester are also connected to protect the bus-bar. This 11KV is given to the switchgear box in the incoming chamber when this 11KV is given to the incomer then there is trolley in the incomer chamber which is to be up to supply the power to the next chamber, with this chamber several feeders are connected in Tatya Tope Nagar S/S with this feeder 16 villages are connected. This supply is provided to Meharbaan Singh Purva, Ambedkar Nagar, and Tatya Tope Nagar etc. From here 33KV is also provided to Meharbaan Singh Purva S/S. shubham sachan </li> <li> 3 3. Visit of 132/33KV Armapur S/S 132/33KV Armapur S/S is come under Uttar Pradesh Power Transmission Corporation Ltd. This S/S is only for giving the supply to the Kanpur Ordinance Factory. In this S/S 132KV is step down to the 33KV and then give it to the OFC. Here two 132KV main lines are taken as I/P from Panki Thermal power plant than with this line LA is attached after two PTs are attached in parallel, after PTs two CTs are attached in series here in this S/S two PTs &amp; CTs are use because first PT is of KESCO department and second PT is of OFC Armapur S/S same as concept is used is CTs also. After this bus bar is used again LA is connected on further connections after this SF6 circuit breaker is used, this is done with both the lines, after this insulators are connected now this 132KV is then give to PT of rating 20MVA and converted to 33KV, in this PT oil circuit breaker are used with buchholz relay is used for this transformer protection. Then again insulators, PTs, CTs and bus bar are used for further supply before this 33KV is given to the OFC Vacuum circuit breaker is also used. This S/S is fully automatic and these all equipment are also controlled through control room. So before doing any kind of maintenance it is close it from the control room then also through isolators and if any maintenance in doing on C.Bs then there is an special feature to close it from there also. On the last day of my training. I get this opportunity to see the 132/33KV Armapur S/S. This S/S is installed in 2006 and give its service from 2007 this is Kanpurs first S/S with latest all technology. All the equipment which is used in this S/S are well grounded and fully protected. shubham sachan </li> <li> 4 4. Electric Supply System The conveyance of electric power from a power station to consumers premises is known as electric supply system. An electric supply system consists of three principal component, power station, transmission lines, and distribution system. Electric power is produced at the power stations which are located at favourable places, generally quite away from consumers. It is then transmitted over large distances to load centres with the help of conductors known as transmission lines. Finally, it is distributed to large number of small and big consumers through a distribution network. 5. Electrical Substation A substation is a part of an electrical generation, transmission and distribution system. Substation transforms voltage from high to low, or the reverse, or performs any of several other important functions. Between the generation station and consumer, electric power may flow through several S/S at different voltage level. shubham sachan </li> <li> 5 S/S may be owned and operated by an electrical utility, or may be owned by a large industrial or commercial customer. Generally Substation is unattended, relying on SCADA for remote supervision and control. A S/S may include transformers to change voltage level between high transmission voltage and lower distribution voltage, or at the interconnection of two different transmission voltage. As this project report is based on 33/11 KV Distribution S/S, Tatya Tope Nagar, Kanpur; so what are the component used in this Substation are described below. 5.1. Type of substation i. Transmission Substation A transmission S/S connects two or more transmission lines. The simplest case is where all transmission lines have the same voltage in such case, S/S contain high-voltage switch that that allow lines to connected or isolated for fault clearance or maintenance. A Transmission Station may have transformer to convert between two transmission voltage, voltage control power factor correction device such as capacitor, reactors or static VAR compensator. ii. Distribution Substation A distribution S/S transforms power from the transmission system to the distribution system of an area. It is an economical to directly connect electricity shubham sachan </li> <li> 6 consumers to the main transmission network, unless they use large amount of power, so the distribution station reduces voltage to a suitable for local distribution. The input for a distribution S/S is typically at least two transmission or sub transmission lines. Input voltage may be, for example, 115 KV, Distribution voltage are typically medium voltage, between 2.4KV and 33KV depending on the size of the area. iii. Collector Substation In distributed generation projects such as a wind farm, a collector S/S is required. It resembles a distribution S/S although power flow in the opposite direction, from many wind turbines up into the transmission grid. Usually for economy of construction the collector system operate around 35kv and the collector S/S steps up voltage to transmission voltage grid. 5.2. According to the service requirement i. Transformer S/S ii. Switch S/S iii. Power Factor Correction S/S iv. Frequency Change S/S v. Converting S/S vi. Industrial S/S 5.3. Classification of Substation A S/S has many components e.g. C.B, switches, fuses etc. S/S is classified as: i. Indoor Substation These type of S/S are used for voltage up to 11KV, the equipment of the S/S is installed because of economical consideration. ii. Outdoor Substation Voltage beyond 66KV as the name suggest these are installed outside, It is because for high voltage, the clearance between conductor and the space shubham sachan </li> <li> 7 required for switches, C.B and other equipment become so great that it is not economical to installed the equipment indoor. iii. Under Grounded Substation In thickly populated areas, the space available for equipment is limited and the cost of land is too high. Under such situation, the S/S is created underground. shubham sachan </li> <li> 8 iv. Pole-mounted Substation This is outdoor S/S with equipment installed over head on H-pole or 4-pole structure it is cheapest from S/S for voltage not exceeding 11KV. 6. Conductors In physics and in electrical engineering, a conductor is an object or type of material which permits the flow of electrical charges from one direction to other. In metals like Aluminium and copper the movable charged particle are electrons. * Aluminium in place of copper a. Much lower cost b. Lighter in weight c. Larger in diameter d. Low voltage gradient less ionization and corona 6.1. Type of conductor used in S/S i. AAC- All Aluminium Conductor AAC are used in primary for overhead transmission and also for primary and secondary distribution, where capacity must be maintained and a lighter conductor is desired, and when conductor strength is not a critical shubham sachan </li> <li> 9 factor. Class B, Class C are used primary as bus, apparatus connectors and jumpers, where additional flexibility is required. ii. AAAC-All Aluminium Alloy Conductor Used as bare overhead conductor for primary and secondary distribution. Designed utilizing a high-strength aluminium alloy to achieve a high strength to weight ratio; afford good sag ratio. iii. ACSR-Aluminium Conductor Steel Reinforced Used as bare overhead conductor for primary and secondary distribution conductor and distribution conductor. ACSR offers optimal strength for line design. iv. ACAR-Aluminium Conductor Aluminium Alloy Reinforced Used as bare overhead conductor for primary and secondary distribution cable. A good strength to weight ratio makes ACAR application where both ampacity and strength are prime considerations in line design. v. ABC lines-Aerial Bundled conductor Aerial bundled cables simply called ABC are overhead power lines using several insulated phase conductors bundled tightly together, usually with a bare neutral conductor. 6.2. Conductors Used In S/S Design An ideal conductor should fulfil the following requirements: 1. Should Capable of carr...</li></ul>