摘要
针对现有无源滤波器滤波效果较差,易出现谐振过电压、谐波放大等现象的问题,提出一种基于基波谐振原理的谐波治理新方法。该方法在电网与无源滤波器之间的三相线路中分别串联一组由电感和电容组成的基波谐振电路,迫使谐波电流最大限度地流入无源滤波器,从而大幅提升滤波器的效率。实验结果表明,增加基波谐振电路后,电流畸变率从10.6%下降为0.942%,滤波效果更佳。
For problems of poor filtering effect and easily leading to resonance overvoltage and harmonic amplification of existing passive filter,the paper proposed a new method of harmonic elimination based on fundamental resonance principle.The method seriesly connects a fundamental resonant circuit composed by inductance and capacitance in three-phase line between electricity grid and passive filter,so as to force harmonic currents to flow into passive filter and significantly enhance efficiency of the filter.The experimental result shows that the current distortion rate drops from 10.6% to 0.942% after adding fundamental resonant circuit,which indicates the new method has better filter effect.
出处
《工矿自动化》
北大核心
2012年第11期27-30,共4页
Journal Of Mine Automation
基金
广西研究生教育创新计划资助项目(GXU11T32520)
关键词
供电系统
谐波治理
无源滤波器
基波谐振
power supply system
harmonic elimination
passive filter
fundamental resonance
