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分析了电力系统负荷模型对电网频率稳定性的影响,以2009年华中电网一次调频及国内某电网机组跳闸实测数据为依据,对实验结果和仿真结果进行了对比研究。通过调整负荷频率系数,验证了负荷模型及其拟合参数的正确性和有效性。通过仿真证明目前国内频率稳定计算时采用的负荷频率系数偏保守。
The influence of the power system load model on the frequency stability of the power grid is analyzed. Based on the primary frequency modulation of Huazhong Power Grid in 2009 and the measured data of a tripping unit in a power grid in China, the experimental results and the simulation results are compared. By adjusting the load frequency coefficient, the correctness and validity of the load model and its fitting parameters are verified. Simulation shows that the load frequency coefficient used in the current domestic frequency stability calculation is conservative.