Research on Load Voltage Characteristics Based on Improved RLS Algorithm

The problems of power supply voltage quality, system losses and power demand are increasing serious, load voltage characteristics need to be studied to solve these problems. The time-varying ZIP model can represent voltage dependence of loads and capture the load characteristics. This paper proposes the improved recursive least square (RLS) algorithm which based on cumulant and variable forgetting factor to estimate time-varying ZIP model parameters, the proposed method can suppress the influence of noise and track the change of parameters quickly, and the results of simulation show the method has good tracking performance and strong robustness.