多谐波源网络谐波源建模与谐波叠加仿真

随着电力电子装置在现代有色加工企业中的应用日益广泛,其容量日趋增大,数量日趋增多,形成了多谐波源的特点,使电网中的谐波污染日益严重,网侧功率因数低。分析了某有色加工企业供电系统的谐波分布情况,构建了其谐波源模型,分析了谐波源的谐波特性,进而将它们分为电流型谐波源和电压型谐波源。针对多谐波源叠加的情况,探讨了国内外对该问题处理所使用方法的缺陷性和局限性。从节省投资、提高谐波抑制效果的目的出发,运用电磁暂态仿真模型来分析多谐波源网络的谐波叠加问题,并进行了仿真实验,得到了较为满意的结果。

Harmonic sources modeling and harmonic superposition simulation of power system with multi-harmonic sources

With the widely use of high-power power electronic devices in modern metallurgical enterprises, multi-harmonic sources exist in industrial power system. Therefore, it leads to increasing harmonic pollution and low power factor. The harmonic distribution in industrial power system of a metallurgical enterprise was analyzed. Furthermore, harmonic models were established and character of harmonic sources was analyzed too. Then, harmonic sources are divided into current harmonic sources and voltage harmonic sources. Aiming at multi-harmonic sources in industrial power system, the methods to solve the harmonic superposing problem and their shortcomings were discussed. In order to save investment and improve effect of suppressing harmonic, an electromagnetic transient simulation model was proposed to analyze multi- harmonic superposition. Simulation experimental results were also given.