变频器谐波引起PLC电源故障的分析与处理  

Analysis of PLC Power Fault Caused by Frequency Converter Harmonic Wave and Treatment

作　　者：徐国强 XU Guo-qiang(Shangang Group Laiwu Iron & Steel Xinjiang Co., Ltd., Laiwu 271104)

机构地区：[1]山钢集团莱芜钢铁新疆有限公司,莱芜271104

出　　处：《冶金设备管理与维修》2019年第3期12-13,17,共3页Metallurgical Equipment Management and Maintenance

摘　　要：针对煤气加压站PLC电源屡次烧坏的现象,进行分析试验,发现其原因是受谐波畸变的干扰,而该谐波源是来自于变频器。由于变频器的输入电抗器配置不当,总谐波畸变率远远超过了允许值。重新设计了输入电抗器并改造后降低了总谐波畸变率,取得了良好效果。The PLC power of gas pressuring station often bum-out. Make an analysis and experiment. It turned out that the reason is the interference of harmonic distortion, which comes from the frequency converter. Due to the improper configuration of the input reactor, the total harmonic distortion rate far exceeds the allowable value. After redesigned the input reactor, the total harmonic distortion rate is reduced. Good effects are achieved.

关 键 词：变频器 谐波 电抗器 

分 类 号：TM711[电气工程—电力系统及自动化]