城轨24脉波整流器的有源滤波器研究

摘要

The presence of harmonics serious threats the stability and reliability of the power system, having a certain impact on the safety operation of urban rail transit. The paper introduces the working principle of the 24-pulse rectifier set and the connection type of transformer, analyzes the harmonic characteristics. It describes the principles for active filter and harmonic current detecting methods, control algorithm. Finally, a simulation model is created to study the compensation function of the non-characteristic subharmonics of the active filter on the 24-pulse rectifier set.%　　谐波的存在严重威胁电力系统的稳定性和可靠性，对城市轨道交通的安全运行有一定影响。现在轨道交通普遍采用24脉波整流机组，介绍24脉波整流机组的原理及变压器连接方式，分析其谐波特点。对有源滤波器的原理和谐波电流检测方法、控制算法进行说明。最后建立仿真模型，研究有源滤波器对24脉波整流机组非特征次谐波的补偿作用。