Abstract
With the coupling relationship between active power and reactive power in power system becoming stronger, the control mode that automatic generation control (AGC) and automatic voltage control (AVC) operate separately may influence the control effect. Considering the different control period of AGC and AVC, this paper proposes a coordinated control method of AGC and AVC with a connection on the timescale of minute level and second level. On the minute level, an optimal power flow model of active power and reactive power associated together is established, and a AGC and AVC associated optimization control method are proposed. On the second level, the paper improved the repective control strategies of AGC and AVC, also proposed a coordinated correction control method of both of them. Simulations are made to verify that the method proposed in this paper meets the respective control objective of AGC and AVC. At the same time, it can realize the economical operation of power system, restrain the mutual influence of AGC and AVC, while promote the mutual support between AGC and AVC.
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