随着社会的进步及国民经济的发展,供电系统的供电质量的提高成为广大用户和设计、制造单位关心的大事。许多工矿企业、生活小区和重要的用电系统停电均会造成重大事故或经济损失。 为了避免停电损失,一些重要的用户装备了两路供电系统。实际上,两路供电系统又分为两种基本形式:一种是人们所熟悉的市电加自备发电系统,平时市电供电,当市电停电 With the progress of society and the development of the national economy, the improvement of the power supply quality of the power supply system has become a major concern for the vast number of users and design and manufacturing units. Many industrial and mining enterprises, living quarters and major power system blackouts will result in major accidents or economic losses. In order to avoid power loss, some important users are equipped with two power supply systems. In fact, the two power supply system is divided into two basic forms: one is familiar with the mains plus self-generating system, usually mains supply, when the mains power outage