基于PSCAD/EMTDC的谐波仿真分析

Harmonic Simulation Analysis based on PSCAD/EMTDC

在电力系统中,仿真是分析复杂电路的有效手段。尤其在谐波研究领域,无论是抑制谐波或是预测谐波源,对线路的精确仿真分析都是必不可少的。首先介绍了谐波源和谐波分析的基本原理,用PSCAD/EMTDC软件建立对电网危害较大的典型换流装置以及实际线路的仿真模型。通过理论、仿真和实际三者的比较分析,验证了该软件及所建立的仿真模型能较好地模拟谐波源电路,在谐波分析、谐波预测及谐波治理等方面均有很好的应用价值。

Simulation is an effective approach to analyze the complex circuits in power system.In order to eliminate the harmonics in power system, it is necessary to do accurate simulations on different conditions. This paper introduces the primary theory about harmonics and its analysis. The actual lines and the typical converter which may do great harm to the grid are modeled with PSCAD/EMTDC.The comparison between the waveforms of the theoretical prediction,the simulation and the practical measurement proved that the software PSCAD/EMTDC and the founded simulation model can simulate the harmonic circuits accurately, so it is benefit for the harmonic analysis, harmonic prediction and harmonic management.