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Masters of Engineering

Masters of Engineering. Small Signal Stability. Aaron Cowan Electrical Engineering Power. Small Signal Stability. Exciter Field current Terminal voltage Power System Stabilizer Enhance stability Rotor angle Equal Area Criterion (Fig 13.5, Kundur ) A a < A d A a > A d.

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Masters of Engineering

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  1. Masters of Engineering Small Signal Stability Aaron Cowan Electrical Engineering Power

  2. Small Signal Stability • Exciter • Field current • Terminal voltage • Power System Stabilizer • Enhance stability • Rotor angle • Equal Area Criterion (Fig 13.5, Kundur) • Aa < Ad • Aa > Ad

  3. SMIB Example Problem details in section 12.3 of Power System Stability and Control, Kundur

  4. Results Kundur ωd = 1.05Hz ξ = 0.15 KS = 0.829 KD = 14.08 Matlab ωd = 1.21Hz ξ = 0.1447 KS = 1.1062 KD = 15.6306 State Matrix and eigenvalues agree A =

  5. Power World Transient Stability WECC equivalent in Power World

  6. Exciter Models

  7. Exciter Models

  8. Exciter Models

  9. PSS Model

  10. IEEE 421.2

  11. SMIB – Power World { • Equivalent SMIB • State Matrix • Eigenvalues

  12. Power World Transient Stability WECC equivalent in Power World

  13. Stability Simulation • Default values used • Did change TR to 0.02 in all cases • SEXS_GE and STAB1 ↔ Fig 17.5, Kundur • Set all generator stability models equal • Innumerable permutations

  14. Stability Simulation • Fault on line 7-5 • Both breakers open • Cleared in 0.07 sec • Three cases for each Exciter • Each generator • Three cases for each Exciter+PSS • Each generator

  15. Generator 1

  16. Generator 1: ESAC1A

  17. Generator 2

  18. Generator 2: ESDC1A

  19. Generator 3

  20. Generator 3: SEXS_GE

  21. Summary • Power World Transient Stability • Block Diagrams • SMIB Eigenvalues • ESDC1A without PSS • SEXS_GE with PSS • PSS stability enhancement

  22. Small Signal Stability Questions?

  23. Generator 1: ESDC1A

  24. Generator 1: SEXS_GE

  25. Generator 2: ESAC1A

  26. Generator 2: SEXS_GE

  27. Generator 3: ESDC1A

  28. Generator 3: ESAC1A

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