Research on optimization setting of reactive power interval based on nine-area figure strategy

Focused on the current problems which exist in nine-area control strategy, such as frequent operation of control equipment and low qualified rate of voltage, the theory of nine-area method is deeply analyzed, and a new optimal setting method of reactive power interval in nine-area figure is proposed. A math model of evaluation function based on one-day energy loss of network, one-day adjusting times of transformer tap and capacitor switch and voltage quality is applied and improved to get proper upper and lower limit of reactive power. Simulation research of consecutive sections of nine-area strategy is conducted by programming with C# language. Simulation results show that the method is effective and the math model is accurate, and it has the guiding significance for setting reactive power parameters in voltage/ reactive power control over substation.