Introduction Consider a power system containing one or more turbine-generator unit generators Load continuously varies 0 Need certain measures to turbine-generator unit dispatch the load to every generator I control Governor maintains the I signals measurements of i generator electric mechanical speed of power outputI generator(frequency) power measurement of system Supplemental control system acts to dispatch the load generation system frequency control Affect the power output measurements of system tie-line flows to Generally need remote neighboring systems signals 电力集镜
电力系统广域测量与控制四川省重点实验室 Introduction Consider a power system containing one or more generators Load continuously varies Need certain measures to dispatch the load to every generator Governor maintains the mechanical speed of generator (frequency) Supplemental control system acts to dispatch the load Affect the power output Generally need remote signals
Variation of system load (1)period less than 10s,small variation:small operation, oscillation of transmission line etc governor Primary frequency regulation (2)Period in (10s,180s),larger variation:startup /shutdown of large machine or electric furnace Frequency regulator 二 Secondary frequency regulation (3)largest variation period and magnitude:weather, production or living pattern Optimally allocate load ED of power system among generators (generation plan) according to prediction 电力拿镜广城洲量写控制四川省重点实验蜜 家电
电力系统广域测量与控制四川省重点实验室 Variation of system load （1）period less than 10s, small variation: small operation, oscillation of transmission line etc （3）largest variation period and magnitude: weather, production or living pattern （2）Period in（10s，180s）, larger variation: startup /shutdown of large machine or electric furnace governor Primary frequency regulation Frequency regulator Secondary frequency regulation Optimally allocate load among generators according to prediction ED of power system (generation plan)
Generator model,load model, prime-mover model and governor model
Generator model, load model, prime-mover model and governor model
Generation system and its control system Excitation Automatic voltage Synchronous regulation generator Energy flow Measure Turbine device Control valves elec f pret Automatic frequency regulation Step-up transformer 电力拿镜广城洲量写控制四川省重点实验蜜 家电
电力系统广域测量与控制四川省重点实验室 Generation system and its control system
Generator model Valve/gate Generator Steam or water- Turbine Speed Load Pr Governor T=mechanical l torque Te=electrical torque Pm=mechanical power Pe=electrical power PL=load power Every generator is installed with a governor,realizing the primary control of frequency;the supplemental regulation from control center realizes the dispatch of load Generation and frequency control are also called Load- frequency control (LFC) 电网
电力系统广域测量与控制四川省重点实验室 Generator model Every generator is installed with a governor, realizing the primary control of frequency; the supplemental regulation from control center realizes the dispatch of load Generation and frequency control are also called Loadfrequency control （LFC）