考虑频率特性的负荷模型研究及应用

Study and application of load models considering frequency characteristics

针对大干扰情况下电力系统仿真若忽略频率因素会影响仿真精度的问题,在原有模型结构的基础上提出了考虑频率特性的两种负荷模型:综合负荷模型和线性动态模型,并提出了"先动后静"获取静态特征系数的方法.将模型应用于新疆电网具体实例,结果表明,采用两种模型仿真的动态响应都和实测响应接近,并且考虑频率的仿真精度比不考虑时要高.

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.