电机节能器的三相不平衡检测和保护

Measure and Protection of Three-Phase Motor under Lopsided Energy-Saving Conditions

由于现阶段电力供应的限制以及出于能源、经济等方面的考虑 ,电机节能器得到越来越广泛的应用。但电机节能器在应用中 ,由于负载的不对称 ,容易产生三相不对称交流电压 ,甚至是直流电压 ,严重时会损坏电气设备 ,影响生产。因此 ,解决电机节能器运行状态下的三相不平衡检测和保护问题 ,对于保护电气设备、推广电机节能器的应用和节约能源具有重要的意义。本文分析了电机节能器运行状态下三相负载不平衡时直流及不平衡交流产生的原因 ,提出了解决的方案。

In view of limitation of electric power to be supplied, energy source and economy, motor energy-saving appliances are used more and more widely. But, the DC and lopsided AC voltage always take place when three-phase loads are not balanceable on the running occasion of motor energy-saving, which can attaint appliances. The reason was analyzed why the DC and lopsided AC voltage takes place when three-phase loads are not balanceable on the running occasion of motor energy-saving appliance and the solution was given.