Impact of Load Frequency Characteristics on Frequency Stability of Power Systems

The impact of power system load model on frequency stability of power systems is analyzed.Based on the practical measured data of primary frequency regulation in Central China power grid in 2009 and the measured data of generation unit trip of a certain domestic power network,the comparative research between experimental results and simulation results is performed.By means of adjusting load frequency coefficient,the correctness and effectiveness of load model and its fitting parameters are verified.Simulation results show that the load frequency coefficient adopted in domestic frequency stability calculation biases towards conservative.