电力系统局部电路谐波谐振产生原因分析及对策

Causal analysis and countermeasure on harmonic resonance in local circuit of electric power systems

对在谐波源产生的谐波作用下,电力系统局部电路发生串、并联谐振的原因进行深入分析,论述了电力系统运行中较常见的电磁式电压互感器铁芯饱和引起的谐波谐振的发生原理,针对谐波谐振过电压的危害提出了预防和应对措施,通过减少谐波源,限制注入电网的谐波电流和采取措施使系统参数处于谐振范围之外来预防和抑制谐波谐振的发生。

This paper analyses the reasons of series resonance and parallel resonance effected by harmonic from the harmonic source in local circuit of electric power system, discusses the theory that core saturation of electromagnetic potential transformer results in harmonic resonance in the running of electric power system, and puts forward precautionary measure and countermeasure to deal with the overvoltage＇s harm of harmonic resonance, Decreasing harmonic source, limitting harmonic electrical current breathed into electric network, and taking action which can keep system parameter out of the range of resonance can prevent and restrain harmonic resonance.