Study and application of load models considering frequency characteristics

For simulation precision problems of power systems with large disturbances neglecting frequency,two load models that consider frequency characteristics,the synthesis load model and the linear dynamic model,were proposed based on the existing model structure. A combined method of dynamic modeling and static modeling was put forward to obtain static characteristic coefficients of electric loads. The proposed models were applied to the Xinjiang power grid. The results indicate that the dynamic responses simulated by the two models are close to the measured ones. The load model with consideration of frequency characteristics has more accurate precision than that without consideration of frequency characteristics.