一种低压谐波抑制的新方法

介绍一种新的谐波抑制装置—通用滤波器UHF(UniversalHarmonicFilter)或线性滤波器(Lineator),它是无源滤波器领域里新的进展。它采用带有小容量滤波电容器的T型电抗器反极性接入电源与负荷之间。使得经过绕组中的反串互感减少了供电系统与非线性负荷之间的电压降落,同时,在谐波条件下供电系统支路形成一个高阻抗。这样,就使大部分谐波电流流入滤波器支路,而流入系统的谐波电流大大减少。使用SIMULINK,对装有UHF的三相六脉波整流器装置的工作特性进行数字仿真并与单调谐滤波器相比较,分析结果表明采用UHF对谐波有更好的抑制效果。

A New Approach to Harmonic Restraining in Low Voltage Network

A new approach to harmonic restraining——Universal Harmonic filter, named as LINEATOR, is proposed. It is an advance in the passive power filter. The device consists of T-type reactor reversed polarity with a small filter capacitor connected between the power supply and the load. For this reason, the series-opposing mutual inductance reduces the voltage drop across the winding between the power supply system and non-linear load, while in the harmonic condition, a high impedance is fromed in the supply system circuit. As a result, the majority of harmonic currents are diverted from the power system into the filter circuit, and the harminic currents which flow into supply system are radically reduced. The digital simulation and experimental study of a 6 phase rectifying circuit whith the UHF are conducted. The harmonic components of the current on the power supply side are effectively reduced by the UHF in compaison with the 5~(th) harmonic LC single-filter.