Contents Introduction Phasor Measurement Unit(PMU) ■Control based on WAMS state of arts and development trend 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 Contents  Introduction  Phasor Measurement Unit (PMU)  Control based on WAMS  state of arts and development trend