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