PRDC - Tridaxsolutionstridaxsolutions.com/pdf/mipower.pdf · Power System Analysis & Simulation Software Package Introduction Power System Network Editor Database Manager MiPower

Power Research & Development Consultants Pvt. Ltd.th nd# 5, 11 Cross, 2 Stage, West of Chord Road, Bangalore, INDIA, PIN 560086

Tel: +91-80-23192159, 23192168 Fax: +91-80-23192210

[email protected] www. prdcinfotech.com

Released in December 2007

TO ORDER CALL: +91-80-23192209

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empowering power system engineers

TMTM

Power Research & Development Consultants Pvt. Ltd.TH ND# 5 11 CROSS 2 STAGE WEST OF CHORD ROAD BANGALORE INDIA PIN 560086

Tel: +91-80-23192159, 23192168 Fax: +91-80-23192210

[email protected] www. prdcinfotech.com

Power System Analysis & Simulation Software Package

Introduction

Power System Network Editor

Database Manager

MiPower is a highly interactive, user-friendly windows based Power System Analysis package. It includes a set of modules for performing a wide range of power system design and analysis study. MiPower features include a top notch Windows GUI with centralized database. Steady state, transient and electro-magnetic transient analysis can be performed with utmost accuracy and tolerance.

q Icons of all power system components.q Multi-Layering of objects to view, select edit and present

the results.q Multi-level nesting of sub-systems.q Resizing for individual drawing elements.q Switching ON/OFF for all power system elements.q Highlighting of study results lies within a band of

minimum, normal and maximum limits.q Panning to facilitate fast and easy scrolling along X and Y

direction.q Realtime zooming facility for the diagram to any fractions

of a zoom level.q Reduction of the whole drawing to any fraction to fit any

paper size.q GPS Interface

q Enhanced database creation including detailed modelling of power system components.

q Use of advanced techniques for all studies.q Studies at your fingertips - once database is created

accurately any study can be conducted.q User defined number of contingencies and Schedules.q Splitting of database into two groups - element

information and library information - avoids repetitive entry of power system elements having same parameters.

q Toggling Facility - Database to Network editor, Database to Graph to facilitate easier navigation.

q Multiple X and Y columns can be plotted in the same view

q User defined colour, thickness, symbols and number of symbols on curve, title and font.

q Conversion of graphs to dxf and text formats.q Harmonic analysis of graphsq Mathematical operations on Graphsq Pick Drag and drop facility for relay curvesq Changing the base voltage of the plotted graphs

q Designed for Simulation and testing of Control Blocksq Customized Design of Governers, AVR'S, SVC'S, HVDC

controllers are possibleq Control blocks can be linked with Transient stability for

testing the performance of the system

Graph Utility

Free Programmable Blocks

Load flow Analysis

Short Circuits Analysis

Transient Stability Study

Relay Co-ordination

Voltage Instability Analysis

Harmonic Analysis

Dynamic Stability Analysis

q Slack Bus Concept Gauss - Seidel, Newton - Raphson, Fast-DeCoupled techniques

q Frequency dependent, Optimal load, Ac/DC flowq Multiple islanded systemsq Customized report facilityq Real & Reactive power Optimizationq Economic Dispatchq Contingency Ranking & Analysis

q Fault levels for symmetrical and asymmetrical faults.q ANSI/IEEE standardsq IEC standards including 363 & 909q All types of symmetrical and asymmetrical faults with and

without impedance

q Various types of fault at user defined locationq Detailed representation of excitation systems, turbines

governors static var compensators, power system stabilizers and HVDC controllers

q Load Sheddingq Simulation of operation of voltage / current / frequency relays

and distance relays

Gives new relay settings for improved performance and computer zone settings for distance relays. Relay co-ordination can be conducted for relays of all make and with user defined characteristics for overcurrent and distance relays. Simulation option available.

Designed to assess the risk of Voltage instability and margin of stability during sudden disturbances, under steady state conditions. It ranks the load busses based on the L-index value and the highest L-index indicates the system collapse point. The value of L-index is zero at no load and 1 at the verge of collapsing point.

Performs three-phase harmonic load flow to compute harmonic distortion factors. Calculates harmonic transfer and driving point impedances for both transmission and distribution power systems.

Performs the dynamic stability analysis in both frequency domain (Eigen value analysis) and time domain.

Network Reduction

Sub-Synchronous Resonance

Electro Magnetic Transient Analysis

Line and Cable Parameter Calculation

Long Term Load Forecast

Three-phase Load Flow Analysis

Provides the static and dynamic equivalents for the power system. In case of Static equivalent, program determines the bus admittance matrix (Y ) as seen from the desired nodes by bus

eliminating the rest of the nodes. In case of dynamic equivalent, a single machine equivalent circuit is determined.

Frequency response method is used for analyzing the stability of sub-sysynchronous resonance, as modelled by a number of synchronous machines and an extensive series compensated transmission network. The method allows the simultaneous detailed modelling of all machine shafts and control loops and hence permits investigation of possible interaction in the sub-synchronous resonance frequency band between machines in different plants.

Performs both transient and dynamic over voltage studies. The highest discharge currents and enrgy stresses for the protective equipment and to co-ordinated them with withstand levels of the protected equipment is determined. Over voltages, which are caused due to energization of lines, transformers and shunt elements, during fault inceptions and on clearing of faults are calculated.

Program calculates positive and zero sequence parameters of the overhead lines and cables used in single and multi-phase configurations over a wide range of user defined frequencies and temperatures. It also calculates the mutual impedance between power and communication lines.

Long Term Load Forecast module is designed for forecasting the energy demand during the planning stages of a power system. The salient features of this tool are q Generality to apply for any type of load dataq Can accommodate any number of independent variable,

which are very significant.q The method adopts multivariate regression techniques for

forecastingq Capability to select the best model out of various models

Load Flow Analysis for 3-phase four wire system.

TM

MiPower Utlities

AutoCAD Interface

Ground Mat Design

AutoCAD Interface is a utility to convert the MiPower Network to

AutoCAD and to plot the results obtained using the MiPower

applications on an existing AutoCAD diagram.

PowerGMD is designed to compute the substation ground grid.

This is a dialog based interactive program.

Automatic single Line Diagram Generation

Reliability Indices

Available Transfer Capability Computation (Open Access feasibility)

Data Import/Export Module (IEEE & Others)

ASLG is a utility to generate the single line diagram of the electrical system. Input to ASLG is the MiPower database file for the particular electrical systemq Easy creation of network after entering he data in the database

manager.q Presenting network parts.

S I N G L E L I N E D I A G R A M S

GE O G R A P H I C A L MA P S

GE N E R A L DR A W I N G S


Tel: +91-80-23192159, 23192168 Fax: +91-80-23192210 [email protected] www. prdcinfotech.com

Released in April 2007

TO ORDER CALL: +91-80-23192209


TM

SINGLE WINDOW ACCESS TO ALL STUDIES

PS Graphic / Network Editor SINGLE WINDOW ACCESS TO ALL STUDIESS I N G L E L I N E D I A G R A M S

GE O G R A P H I C A L MA P S

GE N E R A L DR A W I N G S

TO ALL STUDIES





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TM

PS Graphic / Network Editor

with sample geographical map and networkwith sample geographical map and network

PS Graphic / Network Editor• IEEE / IEC standard symbols

• Real-time Zooming / panning

• Single click Database Link

• Display of study results with SLD

• Dynamic load flow

• Creation of Contingencies

• Nested Networks

• Multi-Layers

• Save / Load snapshot

• Find a Bus / Node

• Element in-service / out-of-service

• User configurable base voltages

• Dynamic IEEE / IEC switch

• Object Z-Order control

• Integrated database

• Invoke any study - LFA, SCS…And more…

Standard Features• Multi-document support

• Context Sensitive Help

• Cut / Paste / Undo / Redo

• Ortho mode for drawing / moving objects

• Dynamic Text fonts

• Rotation / Resizing / WYSIWYG Print preview

• Print / Plot onto any Windows supported printer / plotter

• Supported sizes A4 - A0

with sample geographical map and networkwith sample geographical map and network




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TM


with sample SLD and database managerwith sample SLD and database managerwith sample SLD and database managerwith sample SLD and database manager

Standard Features! Context Sensitive Help

! Quick Find

! Global modification of any data

! Tabular listing of any data

! Industry standard data navigation tools

! Deleted record tracking

Central DB Features! Centralized for Elements & Library

User friendly, Interactive forms

Distinct element & connectivity data

Entry in Per Unit [PU] or own rating

Unlimited number of contingencies

Invoke any study - LFA, SCS...

Apply global multiplication factor

Apply global reduction factor

Integrated AVR, PSS, TG, SVS

Custom HVDC, AVR, PSS, TG SVS

User defined unlimited branch filters

User defined load characteristics

Present worth calculation

Generator capability curves

Standard & Custom reports

Additional MIS reports

Creation of sub-DB from master DB

and more

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Solid validated library of Relays, Breakers, Generators, AVR, SVC, Fuse, Line & Cable etc.




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TM


Multi-Graph PlotterMulti-Graph Plotterwith sample Graphs and data manipulator

Multi-Graph PlotterMulti-Graph Plotter

Standard Features• Context Sensitive Help

• Fonts & User defined X - Y axis lables

• Standard WUSIWYG Print-preview / Print

• User defined Background color

• Export to AutoCAD

• Zoom facility

Key Features• Linear, semi-log, log scales

• Curve Tracing

• Superimpose multiple graphs

• User defined X - Y axis labels

• Device co-ordination using curves

• Harmonic Analysis of obtained graphs

• Mathematical operations on obtained curves

• Use of Symbols for curve identification

• Flexible Axis alignment

• Provision for modifying data at any time

TM




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PowerLFA

Analysis

Load Flow Feature highlights

! Use of sparsity technique saves memory and is faster

! Slack bus, Frequency dependent, Optimal and contingency ranking

! Fast-DeCoupled, Newton - Raphson and Gauss-Seidel methods

! Frequency dependent with Flat Tie-Line, Flat Frequency and Flat Tie-Line Frequency Bias Control

! Active / Real Optimal load flow

! Reactive Optimal load flow

! Active/Real and Reactive load flow

! AC-DC load flow

! Looped, radial and Multiple lsolated systems

! User-defined number of contingencies, cases

! User-defined filters, load characteristics, Generator capability curves

! User-defined frequency and base MVA

! Transmission line can be opened at one or both sides

! Representation of shunt elements in admittance /impedance

! Two / Multi - terminal HVDC systems

! Modeling six/tweleve pulse monopolar / bipolar HVDC converters with constant voltage/current/power controls.

! Modeling two and three winding transformers with auto tap, off nominal fixed tap and phase shift

! Grouping buses zone/area wise

! Load values, scheduled generation, reactor and capacitor values can be changed globally or zone wise using reduction factors.

! Generator Q - check limit violations after a specified number of iterations.

! Changing the load model from the given type to impedance type automatically, when the voltage magnitude at load bus goes below specified value to have better and realistic convergence.

! MVAR compensation

! Load shedding during under frequency to maintain the frequency at desired value.

! Standard and Custom reports

Load Flow results on SLD

Load Flow results in plain text format

TM




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PowerSCS

Studies

Short Circuit

Feature highlightsClick on a bus to introduce fault

Typical Study Results

Quickly plot fault currents for analysis

! ANSI / IEEE standards

! IEEE Std 141-1986[4]

! IEEE C37,010-1979[1]

! IEEE C37,5-1979[3]

! IEEE C7010-1979

! IEC 363

! IEC 909

! Symmetrical and Asymmetrical faults

! Faults with and without impedance

! Loop, radial systems

! Multi islanding

! Multi generation

! Multi cases and contingencies

! Open conductor faults

! Traveling shunt faults

! Fault at all / selected buses sequentially

! Fault at selected voltage level/s

! Earthing & Zigzag transformers

! First Cycle and interrupting fault rating

! Reactor Sizing

! Alerts breaker capacity violation

! Motor contribution to faults

! HVDC system contribution to faults

! Pre-fault voltage condition from the load flow/flat start

! Multiplication factors for unknown zero and negative - sequence parameters

! Positive, negative, zero sequence current & fault-MVA

! Phase A, B, C current and fault MVA

! Peak asymmetrical current, Fault impedance R/x ratio

! Post-fault bus voltages, currents and impedance as seen at the relay positions

! Breaker fault interrupting capacity selection

! User defined output units

TM




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PowerTRS

Studies

Transient Stability

Feature highlights

With Free Programable Blocks

! Unlimited number of disturbances

! Types of disturbances

! Three phase fault

! Single line to ground fault

! Transformer parameter variation

! Transmission line parameter variation

! Load change

! Generator tripping

! Total generation outage

! Excitation loss

! Shunt impedance change

! Motor start and Stop

! Motor starting with

! Auto transformer

! Star delta

! Direct Online -DOL

! Resistance

! Synchronous machine models

! Voltage relays, frequency relays & distance relays

! Standard IEEE voltage regulators

! Standard IEEE steam/hydro/gas turbine governors

! Standard IEEE power system stabilizer

! Standard IEEE static VAR compensators

! Modeling cyclic loads, like rolling mills

! User defined load characteristics

! Modeling of six pulse / twelve pulse monopolar / biploar HVDC converters with constant voltage / current / power controls

! Different levels of load shedding

! User defined AVR's, Turbine-governors, SVCs and HVDC, ULTC controls

! Text and Graphical Output

FPB for user programmable control system

SampleMachineSwing curves

A typical stability graph

TM




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PowerRCD

Overcurrent & Impedance / Distance Protection

Protective Device Co-ordination

Feature highlights

! Radial and mesh networks

! Automatic / Interactive / Manual Primary-back-up relay pairs generation

! Save and retrieval of selected relay pairs

! Embedded fault calculation

! Phase and Earth relay co-ordination

! Optimum setting for Motor relays

! Hot and cold curves considered

! Extensive database of relays

! Extensive fuse data

! Easy adding of new relay to library

! Graphical co-ordination Pick, drag and drop relay curves

! Verification of existing relay settings

! Fault simulation and relay trip sequence

! Text and Graphical Output

! Export to AutoCAD

! Thermal curves for each equipment

! Optional Voltage input from load flow or flat start

! Overload factor, unbalance factor and discrimination time for each relay

! Choice of transient / Sub-transient for Fault calculation

! Fault through impedance

! Fault on bus / node / Transmission line

! Optional inclusion of motor contribution during fault simulation

! Inbuilt discrimination time calculator

! L-G, L-L-L, L-L, L-L-G fault simulation

! Zone 1, zone 2 and zone 3 setting for distance relays

! Impedance seen by the relay for faults

Typical graph of co-ordinated curves

Results showing protective device setting

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PowerETAElectromagnetic Transient Analysis

About ETA

Power systems are subjected to overvoltages that may be

of transient or of persistent nature. Most prominent and

common types of overvoltages are

� Over voltages having atmospheric origin

� Overvoltages generated due to internal causes within

the power system

The overvoltages of atmospheric or external origin are known

as "Impulse overvoltages" and those of internal origin are

called "Switching overvoltages" or "Temporary overvoltages".

These Overvoltages will stress the insulation of the power

system equipment beyond safe limits. This leads to equipment

failure. Hence it is essential to study overvoltage phenomenon

in the power system and their effects on the system.

The transient phenomenon occur on a scale of microseconds

(e.g., initial transient recovery voltage), milliseconds (e.g.,

switching surges), or cycles (e.g. Ferro-resonance). The

system must be designed to withstand these over voltages

with a certain probability, or their effects must be reduced and

limited with protective devices. The simulation of transient

phenomenon is therefore very important for proper insulation

co-ordination, as well as for the proper design of protection

schemes. Simulation studies are needed to investigate

interference in neighbouring communication lines, or

hazardous coupling effect to personnel, livestock, and

equipment.

Typical applications of ETA

Devising highly secured protection schemes

Determine rating of the equipments

Study dynamic behaviour of protective relays during transients

Transients during switching of

Transmission Line

Transformer

Capacitor bank

Induction motor etc.

Study other causes of transients like

Chopping of currents in VC Bs

Load rejection

Faults - SLG, LL, LLL, LLLG

Computing magnetizing inrush current

Flicker assessment due to heavy loads like Arc furnace.

Calculate transformer's DC components / harmonic contents

Highlights

� Transient and dynamic over voltage studies

� Highest discharge currents and energy stresses for the

protective equipment

� Over voltages caused due to

� Energization of lines

� Energization of Transformers

� Switching of shunt elements

� Fault inception and on clearing of faults

� Statistical analysis of breaker closing and opening

� Symmetrical and asymmetrical faults with fault

impedance

� Time varying resistor

� Injection of Impulses voltage/current at a given bus

� User-defined filters

� Output includes

� Three phase over voltage profiles

� Statistical distribution of over voltages

� Arrester voltage, current and energy

� Current through different equipment

� Voltages at different equipment

This picture shows simulated transient overvoltages at a generator bus for a L-L-L-G fault at a load

Documents

PRDC - Tridaxsolutionstridaxsolutions.com/pdf/mipower.pdf · Power System Analysis & Simulation Software Package Introduction Power System Network Editor Database Manager MiPower