变频器输出侧的双LC型滤波器研究  

Research on Dual LC Type Filters on the Output Side of Variable Frequency Converters

作　　者：李颖亮 刘红兵[1] Li Yingliang;Liu Hongbing

机构地区：[1]太原科技大学

出　　处：《智慧工厂》2024年第3期63-68,共6页Smart Factory

摘　　要：在直流网组电动船舶上,电机驱动与日常用电都需要用到变频器。针对变频器输出侧电网谐波的问题,采用无源滤波器方法对其进行抑制。为解决常见的LCL型滤波器存在的动态性能差,滤波效果不理想,且容易在输出端产生较大振荡和电磁干扰问题。本文提出一种高阶的双LC型滤波器。基于对双LC型滤波器优化设计,并将无源阻尼法控制策略应用在此滤波器上,以减小系统在谐振频率处的谐振尖峰并降低高频段的谐波含量,进一步完善所采用滤波器在滤波效果和系统抗干扰上的性能。最后,通过仿真验证基于双LC型滤波器所提出控制策略的有效性。因此,采用双LC型滤波器替代传统LCL型滤波器可以更好地增加系统的效率与稳定性,确保设备的稳定运行。On DC grid electric ships,frequency converters are required for motor drive and daily electricity consumption.To address the issue of grid harmonics on the output side of the frequency converter,a passive filter method is adopted to suppress it.To solve the problems of poor dynamic performance,unsatisfactory filtering effect,and easy generation of large oscillations and electromagnetic interference at the output end of common LCL filters.This article proposes a high-order dual LC type filter.Based on the optimization design of dual LC filters and the application of passive damping control strategy on this filter,the resonance peak at the resonance frequency of the system is reduced and the harmonic content in the high frequency range is reduced,further improving the filtering effect and system anti-interference performance of the adopted filter.Finally,the effectiveness of the control strategy based on the dual LC type filter is verified through simulation.Therefore,replacing traditional LCL filters with dual LC filters can better increase the efficiency and stability of the system,ensuring the stable operation of the equipment.

关 键 词：变频器 LCL滤波器 双LC滤波器 无源阻尼法 谐波分析 

分 类 号：TN773[电子电信—电路与系统]