李璨,杭乃善,郭小璇,曾志明.基于基波谐振原理的无源滤波新方法研究[J].电测与仪表,2012,49(6):38-42. LI Can,HANG Nai-shan,GUO Xiao-xuan,ZENG Zhi-ming.A Research on New Passive Filter Method Based on Principle of Fundamental Resonance[J].Electrical Measurement & Instrumentation,2012,49(6):38-42.
基于基波谐振原理的无源滤波新方法研究
A Research on New Passive Filter Method Based on Principle of Fundamental Resonance
Nonlinear loads increasing brought more and more serious harmonic pollution.In view of defects of active filter of big initial investment,complicated structure and difficult to operation and maintenance,a new passive filter method was presented.The method was that fundamental resonance circuit made up of inductance and capacitance was connected in three-phase circuit between power grids and passive filter.The circuit didn′t affect fundamental circuit,but took on characteristics of high-impedance of harmonic circuit,and could compel harmonic circuit to flow into passive filter by the greatest extent so as to promote filter efficiency by a large margin.This new method had made a filter principle analysis by setting up equivalent circuit comparing with traditional passive filter method,and had been verified by single-phase and three-phase circuit filter experiment.The result indicated that the method had a better filter effect and broad application prospect than traditional passive filter.
