Introduction-frequency characteristics of power system 2)frequency of whole system is the same 3)balance between generation and supply at any time ■ 4)when load increases,the generation is less than the load,then the rotation speed decrease,leading to decrease of system frequency. 6)frequency regulation must be coordinated,not allowing generators acting alone. ■ 7)frequency regulation has relationship with operation cost. ■ 8)Try to dispatch the generation to generators economically 电力拿镜广城洲量写控制四川省重点实验蜜 国家电网电力系统广域测量与控制四川省重点实验室  2) frequency of whole system is the same  3)balance between generation and supply at any time  4)when load increases, the generation is less than the load, then the rotation speed decrease, leading to decrease of system frequency.  6)frequency regulation must be coordinated, not allowing generators acting alone.  7)frequency regulation has relationship with operation cost.  8)Try to dispatch the generation to generators economically Introduction-frequency characteristics of power system