基于时域变换方法的同步发电机电磁暂态仿真模型

Time Domain Transformation Method Based Electromagnetic Transient Simulation Model for Synchronous Generator

基于时域变换的电磁暂态计算方法利用了电力系统中的电压、电流等物理量具有接近正弦波的特征,可以在不损失仿真精度的情况下,增大所使用的计算步长,从而提高仿真效率。为了准确高效地模拟电力系统中与发电机相关的动态特性,采用基于时域变换的方法建立了同步发电机模型,通过不同的算例测试验证了模型的正确性;测试结果表明在一些暂态过程中,可以使用毫秒级的计算步长并具有较好的精度。

Electromagnetic transient calculation method based on time domain transformation takes advantage of the special characteristics of voltage and current in power systems, whose waveforms are close to be sinusoidal. It can use a larger time step and improve the efficiency of simulation without accuracy loss. To accurately and efficiently simulate the dynamics of power systems related to generators, a synchronous generator model based on the time domain transformation method is developed in this paper. Diverse test cases are used to verify the validation of the presented model. Test results show that the accuracy of the presented model keeps good even with time steps of milliseconds.