矿用变频器谐波测试系统设计

Design and Application of Harmonic Testing System of Mine Frequency Converter

摘要:

矿用电气设备尤其是矿用变频器对井下电网电能质量污染的问题,越来越受研发厂家、安全准入、各工矿企业的重视。简述了矿用变频器的结构、原理,研究其谐波产生机理,阐述了其谐波的危害。设计了一套基于FLUKE1760的带负载性能测试系统,该系统主要由测试样机、陪试变频器、对拖电机、电能质量分析仪、上位机等单元组成。使用该系统对变频器进行了谐波加载性能测试,并对采集到的电压电流数据进行了谐波分析。实测结果证明：被测变频器的电压电流中均含有较大的5次7次谐波及高次谐波。

Abstract:

The problem of mine electrical equipment, especially mine frequency converters, which pollutes the power quality of underground power grids is getting more and more attention from research and development manufacturers, safety access, and various industrial and mining enterprises. The harmonic generation mechanism of mine inverter is briefly described,a set of load performance test system based on FLUKE1760 is designed. The system is mainly composed of test prototype, accompany test inverter, tow motor, power quality analyzer, host computer and other units. Using this system, the frequency converter was tested for harmonic loading performance, the voltage and current data were analyzed for harmonics. The actual measurement result proves that, the voltage and current of the tested inverter all contain larger 5th harmonic and higher harmonic.