一种基于晶闸管可控的变压器型滤波器

摘要

A tunable filter of transformer type based on thyristor-control was proposed to solve the problem of detuning caused by the change of component parameters in traditional passive filters and the problem of the additional harmonic existing in TCR passive filters.By analyzing the principle and structure of the traditional passive filter and the TCR filter,the reactor in the TCR filter was replaced by the adjustable transformer-type reactor,and the basic structure and equivalent circuit of thyristor controlled transformer-type filter were analyzed.The simulation results show that this filter keeps its good tuning performance under detuning,effectively restrains the additional harmonics and improves the defects of traditional passive filters which are easily affected by changes of parameters.%针对传统无源滤波器因元件参数变化引起的失谐以及TCR型滤波器存在附加谐波的问题,提出一种基于晶闸管可控的变压器型调谐滤波器.在分析无源滤波器和TCR型滤波器的工作原理和结构基础上,将TCR型滤波器中的电抗器替换成变压器型电抗器,分析了晶闸管可控的变压器型调谐滤波器的基本结构和等效电路.仿真分析表明,在失谐情况下该型滤波器仍具有良好的调谐性能,可有效抑制附加谐波并改善传统无源滤波器易受参数变化影响的缺点.