动态电力系统五.ppt

1、动态电力系统Chapter 9 Prime Movers and Energy Supply Systems See Figure 9.1(p338)lTwo important parts:governor and AGC9.1 Hydraulic turbines and governing systemsl9.1.1-9.1.2(Hydraulic Turbines and Penstock system)l9.1.3 Governors for Hydraulic Turbines Problem:What is the purpose of the droop?(p394)What

2、is the standard steady-state droop?(p394)What is the function of a transient droop?(see Figure 9.8,p396)l9.1.4 Detailed Hydraulic System Modell9.1.5 Guidelines for Modeling Hydraulic Turbines(pp417-418)Governor tuning studiesTransient stability studies(Figure 9.10)Small-signal stability studies(Figu

3、re 9.7+Figure 9.10)Long-term dynamic studies9.2 Steam Turbines and Governing Systems l9.2.1 Modeling of steam turbinesSee Figure 9.23(p430)l9.2.2 Steam turbine ControlsGoverning systems:three basic functions:(pp432-434)normal speed/load controlgovernor system and AGCover-speed controloperating contr

4、ol valvesover-speed triptripping boiler lTurbine controls Start-up/shutdown controlsAuxiliary pressure controllGeneric model of steam turbine controls(pp444)Figure 9.36(p445)l9.2.3 Steam Turbine Off-Frequency CapabilityBlade vibration and resonance(p444)Over-frequency and under-frequency operations(

5、pp447-448)9.3 Thermal Energy Systemsl9.3.3 Modeling of Thermal Energy SystemsIt is important in the long term dynamic response of power systems.(p459)Process physicsAuxiliariesProtectionsControlsChapter 11 Control of Active Power and Reactive Power l11.1 Active power and frequency Control Problem:Wh

6、y it is important to keep the constancy of frequency and its integral?What are the basic idea of load/frequency control?l11.1.1Fundamentals of Speed GoverningGenerator response to load changeLoad response to frequency deviationExample 11.1Isochronous governorGovernors with speed-droop characteristic

7、Percent speed regulation or droopLoad sharing by parallel unitsTime responsel11.1.2 Control of Generating Unit Power Output Load reference adjustingActual speed-droop characteristicl11.1.4.Response Rates of Turbine-Governing SystemsComposite frequency response characteristic =1/Req+DExample 11.2l11.

8、1.4.Response Rates of Turbine-Governing SystemsNote:the over-tuning period l11.1.5 Fundamentals of Automatic Generation ControlAGC in isolated power systemsAGC in interconnected power systemslACE=BfFrequency bias tie line controllACE=Bf+PtieBasis for selection of bias factorSystem with more than two areasPerformance of AGC under normal and abnormal conditionsEconomic allocation of generationl11.1.6 Implementation of AGCl11.1.7 Under-frequency Load shedding