小离相封闭母线与共箱封闭母线在厂用电系统的应用

Application of Small Isolated Phase Bus Duct and Non-Segregated Closed Bus in Auxiliary Power System

高压厂用电电源母线作为连接高压厂用变压器低压侧和高压厂用配电装置之间的关键导体,对火力发电厂的安全运行意义重大。介绍了大型火力发电厂高压厂用电母线型式、原则接线及参数,分析了小离相封闭母线和共箱封闭母线的结构、优缺点和运行业绩,并对两者进行了技术和经济比较,推荐小离相封闭母线在沿海大型火力发电厂厂用电系统中应用。

The high-voltage auxiliary power supply bus is the key conductor between the station transformer at low-voltage side and the highvoltage auxiliary switchgear.It is significant for the safe operation of thermal power plant.Introduction was made to the high-voltage auxiliary power busbar type,the principle line connection and the parameters in large-scale thermal power plant.Analysis was made to the structure,relative merits and operational performance of small isolated phase bus duct and non-segregated closed bus,and the technique and economic comparison was carried out for both of them.The small isolated phase bus duct was recommended to be applied in the auxiliary power system of coastal large-scale thermal power plant.