A differential setting method for gateway reactive power interval of 110kV substation

Aim at the gateway reactive power control range in traditional nine-area strategy cannot adapt to the changes in the operation mode, the correlation characteristic between the active loss and gateway reactive power in 110kV power grid is analyzed in the paper, and a gateway reactive power optimization oriented control strategy and the basis for setting the optimization oriented network loss increment is put forward, according to the method based on boundary conditioned parameter, gateway reactive optimization interval of 110kV power grid is analyzed, and a differential gateway reactive power control range can adapt to different operation modes is given, and the control range is quantitatively assessed through evaluation model. Results show that the proposed method not only improves the economy and safety of power systems but is also easy to implement.