Phần 21 KHÓA ĐÀO TẠO TÍNH TOÁN ỔN ĐỊNH VÀ ỨNG DỤNG TRÊN PHẦN MỀM PSSE CHO KỸ SƯ HỆ THỐNG ĐIỆN (Ổn định kích thích nhỏ và ứng dụng trên Phần mềm PSSE)

Ổn định kích thích nhỏ và ứng dụng trên Phần mềm PSSE.NỘI DUNG CHÍNH PHẦN 21 (small signal stability and application of small signal stability): 1. Transient Stability: a. Time Domain Analysis. b. Step wise Integration of Differential Equations. 2. SmallSignal Stability. a. Frequency Domain Analysis. b. Eigen ValueVector Analysis using Linearized Differential Equations Differential Equations

TRANSMISSION & DISTRIBUTION A Division of Global Power POWER SYSTEM STABILITY CALCULATION TRAINING D10 Sll Si l St bilit D ay 10 - S ma ll - Si gna l St a bilit y July17,2013 Prepared by: Peter Anderson eBook for You SMALL SIGNAL STABILITY 2 SMALL - SIGNAL STABILITY Transient Stability:  Ti D i A l i  Ti me D oma i n A na l ys i s  Stepwise Integration of Differential Equations Small-Signal Stability  FDiAli  F requency D oma i n A na l ys i s  Eigen Value/Vector Analysis using Linearized Differential Equations Differential Equations eBook for You APPLICATIONS 3 APPLICATIONS Power System Size  I i th h G th i I t ti  I ncreas i ng th roug h G row th i n I n t erconnec ti ons  Driven by Potential Cost Savings (Economies of Scale, Use of Lowest - cost Generating Units) Scale, Use of Lowest cost Generating Units)  Focus on Generation-Not on Transmission Disadvantages  Increased Vulnerabilit y y  Inter-Area Oscillations  System Disintegration/Widespread Blackouts eBook for You EIGEN - VALUE ANALYSIS 4 EIGEN VALUE ANALYSIS Applied to a Linearized Model of the Power System System  Importance of the Initial Conditions  Small Disturbances  Small Disturbances  Inter-Area Oscillations  Sub synchronous Torsional Interactions  Sub - synchronous Torsional Interactions  Electro-mechanical Performance in the Low Frequency Range (0 1 to 3Hz) Low Frequency Range (0 . 1 to 3Hz) eBook for You COMPARISON OF APPROACHES 5 COMPARISON OF APPROACHES Approach Advantages Disadvantages Time WideApplicationFields Trial&Error – WideRangeof Domain Disturbances Non‐linearities representedin detail WeaklyDampedModesmaynot beExcitedorObserved Results areFamiliar ModesofDifferent Frequencies/DampingareMixed EvaluationofResults‐Difficult Frequency Domain RevealsRulesbehindSystem Dynamics Non‐linearities notwell repr esented NoneedtoApplyDisturbances LinearizationofCertainElements canbeDifficult IndividualModes areAnalyzed ResultsnotFamiliar Sitin g andTunin g ofDam p in g  g g pg Controllers eBook for You NATURE OF MODES 6 NATURE OF MODES Swing Modes AreaofPrimeInterest NeartheImaginaryAxis(0.1to3Hz) DampingFactor>=5%Satisfactory  f  DampingFactor<3%Unsatis f actory Co n t r o ll e r M odes Co t o e odes Voltage/SpeedRegulators FACTSControllers MonotonouswithStrongDamping Many modesneartheOrigin(Low Damping)areduetoElementswithlong timeconstants‐notanindicationof instability eBook for You SWING MODES 7 SWING MODES Inter-Area Modes FrequencyRange(0.1to0.8Hz) LargeNumberofGenerators GeneratorsinoneAreaswing againstOtherAreas  k  Wea k Inter‐AreaTieLines LowFrequency/WeakDamping Local Modes FrequencyRange(0.8to3Hz) SmallNumberofGeneratorsinaSmallArea HighFrequency/StrongDamping eBook for You SWING MODES 8 SWING MODES 12 3 eBook for You CONTROLLER MODES 9 CONTROLLER MODES Controller Impact DampingFactor ParticipationFactor Siting Indices(Transfe rFunctionResidues) eBook for You APPLICATION OF THE APPROACH 10 APPLICATION OF THE APPROACH Initial Conditions Steady‐stateLoadFlow OperatingScenarios • Peak Load/Maximum Generation Peak  Load/Maximum  Generation •MinimumLoad/MinimumGeneration •Maximum/MinimumIntertieTransfers It dit Ld Mi Hd • I n t erme di a t e L oa d ‐ M ax i mum H y d ro •In termedia teLoad‐MaximumThermal •OutageConditions eBook for You [...]... STABILITY eBook for You Mode Overview 18 SMALL-SIGNAL STABILITY eBook for You Mode Overview 19 SMALL-SIGNAL STABILITY eBook for You Mode Overview 20 SMALL-SIGNAL STABILITY eBook for You Mode Overview 21 SMALL-SIGNAL STABILITY  A right eigenvector determines the relative activity of its eigenvalue on components of system variables (generator rotor angle, real power and reactive power)  Different outputs . You SMALL SIGNAL STABILITY 2 SMALL - SIGNAL STABILITY Transient Stability:  Ti D i A l i  Ti me D oma i n A na l ys i s  Stepwise Integration of Differential Equations Small-Signal Stability  FDiAli  F requency. You OUTLINE 2 OUTLINE • Small-Signal Stability • NEVA – PSS NETOMAC eBook for You 3 SMALL - SIGNAL STABILITY SMALL - SIGNAL STABILITY eBook for You Modal Analysis 4 SMALL-SIGNAL STABILITY Modal Analysis  Exclusively. information  Frequencies and damping  Frequencies and damping  Mode observability and controllability  Controller location and tuning eBook for You Modal Analysis 8 SMALL-SIGNAL STABILITY Modal