基于分级磁阀可控电抗器的谐波特性研究

Harmonic Characteristic Research Based on Classification Magnetic Valve Controllable Electric Reactor

针对磁阀可控电抗器(magnetic control reactor,MCR)产生谐波影响电网的问题,提出将MCR铁心设计成分级磁阀的结构。为此,从理论上比较单级和多级磁阀可控电抗器产生谐波的原理,推导出四级磁阀电抗器谐波电流的表达式,分析了电抗器在不同工作状态下各饱和度之间的关系,对两种不同结构磁阀电抗器进行模拟仿真和试验数据对比,得出与理论分析基本吻合的结论,表明四级磁阀可控电抗器可大大减少总谐波含量。

Aiming at problem of harmonic impact on power grid produced by magnetic controllable reactor, this paper propo- ses to design classification magnetic valve structure for MCR core. Therefore, it compares principles of producing harmonic by single stage and multi-stage magnetic valve controllable reactor by theory and deduces expression of harmonic current of quaternary magnetic valve reactor. It analyzes relations of each saturation under different working state, carries out analog simulation for two kinds of magnetic valve reactors with different structures and compares testing data. It concludes that the actual operation is in accordance with theoretical analysis which shows that the quaternary magnetic valve controllable reac- tor can greatly reduce total harmonic contents.