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动态电力系统

动态电力系统. 张 毅 威 ywzhang@mail.eea.tsinghua.edu.cn 西主楼 III-210 电话 62794698 Ftp ： 166.111.60.30. Chapter 9 Prime Movers and Energy Supply Systems. See Figure 9.1(p338) Two important parts: governor and AGC. 9.1 Hydraulic turbines and governing systems. 9.1.1-9.1.2

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动态电力系统

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  1. 动态电力系统 张 毅 威ywzhang@mail.eea.tsinghua.edu.cn 西主楼 III-210 电话 62794698 Ftp：166.111.60.30

  2. Chapter 9 Prime Movers and Energy Supply Systems See Figure 9.1(p338) • Two important parts: governor and AGC

  3. 9.1 Hydraulic turbines and governing systems • 9.1.1-9.1.2 (Hydraulic Turbines and Penstock system) • 9.1.3 Governors for Hydraulic Turbines Problem: • What is the purpose of the droop? (p394) • What is the standard steady-state droop? (p394) • What is the function of a transient droop? (see Figure 9.8, p396)

  4. 9.1.4 Detailed Hydraulic System Model • 9.1.5 Guidelines for Modeling Hydraulic Turbines(pp417-418) • Governor tuning studies • Transient stability studies(Figure 9.10) • Small-signal stability studies(Figure 9.7 + Figure 9.10) • Long-term dynamic studies

  5. 9.2 Steam Turbines and Governing Systems • 9.2.1 Modeling of steam turbines See Figure 9.23 (p430)

  6. 9.2.2 Steam turbine Controls Governing systems: three basic functions: (pp432-434) • normal speed/load control governor system and AGC • over-speed control operating control valves • over-speed trip tripping boiler

  7. Turbine controls • Start-up/shutdown controls • Auxiliary pressure control • Generic model of steam turbine controls(pp444) Figure 9.36(p445)

  8. 9.2.3 Steam Turbine Off-Frequency Capability • Blade vibration and resonance (p444) • Over-frequency and under-frequency operations (pp447-448)

  9. 9.3 Thermal Energy Systems • 9.3.3 Modeling of Thermal Energy Systems It is important in the long term dynamic response of power systems. (p459) • Process physics • Auxiliaries • Protections • Controls

  10. Chapter 11 Control of Active Power and Reactive Power • 11.1 Active power and frequency Control Problem: • Why it is important to keep the constancy of frequency and its integral? • What are the basic idea of load/frequency control?

  11. 11.1.1Fundamentals of Speed Governing Generator response to load change Load response to frequency deviation Example 11.1 Isochronous governor Governors with speed-droop characteristic • Percent speed regulation or droop • Load sharing by parallel units Time response

  12. 11.1.2 Control of Generating Unit Power Output • Load reference adjusting • Actual speed-droop characteristic

  13. 11.1.4. Response Rates of Turbine-Governing Systems • Composite frequency response characteristic = 1/Req+D Example 11.2 • 11.1.4. Response Rates of Turbine-Governing Systems Note: the over-tuning period

  14. 11.1.5 Fundamentals of Automatic Generation Control • AGC in isolated power systems • AGC in interconnected power systems • ACE = Bf • Frequency bias tie line control • ACE = Bf + Ptie • Basis for selection of bias factor

  15. System with more than two areas • Performance of AGC under normal and abnormal conditions • Economic allocation of generation

  16. 11.1.6 Implementation of AGC • 11.1.7 Under-frequency Load shedding

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