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现有自动电压控制(automatic voltage control,AVC)策略难以保证220 kV变电站充分利用无功电压调控设备兼顾上下层电网无功电压调控的需求,特别在小方式下,省地电网无功电压调控失配问题突出。提出了一种实现上下层电网协调控制的AVC去失配策略。结合省地电网的管理权限、调控目标和AVC策略的分析了省地AVC在220 kV变电站形成无功电压调控失配的机制,通过等值模型反映的无功电压特性揭示了关口电压是解决失配问题的关键指标,将反映上下层电网电压调控状态的关口电压加入到AVC就地电压校正策略中构成了三维去失配判据,以实现常规方式220 kV变电站优先协助下层电网进行区域电压调控,小方式220 kV变电站优先协助上层电网进行区域无功调控的去失配策略。实例仿真证明了去失配策略的有效性。
The existing automatic voltage control (AVC) strategy can not guarantee that the 220 kV substation can take full advantage of the reactive voltage regulation equipment to balance the reactive voltage regulation of the upper and lower grids. Especially in the small mode, With the problem highlighted. An AVC de-mismatch strategy for coordinated control of the upper and lower grids is proposed. Based on the management authority, regulation goal and AVC strategy of provincial power grid, the mechanism of provincial AVC in reactive power voltage regulation and control of 220 kV substation is analyzed. The reactive voltage characteristic reflected by the equivalent model reveals that the gate voltage is the solution to the problem of loss With the key indicators of the problem, will reflect the upper and lower grid voltage regulation state of the gateway voltage added to the AVC local voltage correction strategy constitutes a three-dimensional to mismatch criteria in order to achieve the normal way 220kV substation priority to assist the regional power grid voltage regulation , A small way 220 kV substation to give priority to help the upper grid for regional reactive power control strategy to de-mismatch. The simulation results show that the de-mismatch strategy is effective.