動態(tài)電力系統(tǒng)5

1、 張 毅 威 西主樓 III-210電話 62794698See Figure 9.1(p338)lTwo important parts: governor and AGC(Hydraulic Turbines and Penstock system) 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)Governor tun

2、ing studiesTransient stability studies(Figure 9.10)Small-signal stability studies(Figure 9.7 + Figure 9.10)Long-term dynamic studiesSee Figure 9.23 (p430)Governing systems: three basic functions: (pp432-434)normal speed/load controlgovernor system and AGCover-speed controloperating control valvesove

3、r-speed triptripping boiler lTurbine controls Start-up/shutdown controlsAuxiliary pressure controllGeneric model of steam turbine controls(pp444)Figure 9.36(p445)Blade vibration and resonance (p444)Over-frequency and under-frequency operations (pp447-448)It is important in the long term dynamic resp

4、onse of power systems. (p459)Process physicsAuxiliariesProtectionsControlsl11.1 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?Generator response to load changeLoad response to frequ

5、ency deviationExample 11.1Isochronous governorGovernors with speed-droop characteristicPercent speed regulation or droopLoad sharing by parallel unitsTime responseLoad reference adjustingActual speed-droop characteristicComposite frequency response characteristic = 1/Req+DExample 11.2Note: the over-tuning period AGC in isolated power systemsAGC in interconnected power systemslACE = BfFrequency bias tie line controllACE = Bf + PtieBasis for selection of bias factorSystem with more than two area