Analysis of Controllable Shunt Reactors Configuration at 1 000 kV Wanxian Substation

Using controllable shunt reactor is an effective strategy to solve the contradiction between over-voltage limitation and reactive power compensation in UHV grid.But controllable shunt reactors used in whole stage are not only costing and poor economy but also unnecessary in operation.Based on study on Yaan~Nanjingbei 1 000 kV AC project,and reason analysis of insufficient power compensation at 1 000 kV Wanxian substation,the paper gives out suggestions on optimization of controllable shunt reactor.