Solution of interval reactive power optimization model through defining security limits

The model of reactive power optimization including interval uncertainty (RPOIU) is used to make a voltage control strategy for ensuring the interval state variables (including load voltages and reactive power generation) of the power grid within their safe operating limits, under interval active power generation and power load demand input data. To solve the RPOIU model, this paper defined security limits, and then switches the RPOIU model to two deterministic reactive power optimization models, whose constraints bound limits are the security limits. By solving the deterministic models through the interior point method, a voltage control strategy is obtained as the solution of the RPOIU model. The results obtained by the proposed method are compared with the linear approximation method, which is a previously proposed effective method for solving the RPOIU model, and simulation results and analysis demonstrate the advantages, effectiveness, and good applicability of the proposed method.