电厂厂用电源切换系统研究

Study on the Auxiliary Power Switching System in Electricity Generating Station

对电厂厂用电源切换系统进行了研究,主要分析了电厂机组启动过程中,启动/备用变与厂高变切换过程中各种可能运行工况对机组安全并网的影响,以及机组在短时间并网切换厂用电过程中并网线路发生故障时,对系统及电厂机组带来的影响,针对2台60万kW级机组的厂用电源切换进行了系统论证,通过相关电气计算分析,验证了起备电源方案的合理性,提出了电厂机组切换厂用电的合理时机。

This paper studies the auxiliary power switching system in electricity generating station,mainly analyzes the influences of various possible running conditions in the switching process between start/standby transformers and station’s high transformers on unit＇s safe grid and the influence of grid lines’ faults in the switching process of unit’s short-time grid on the system and auxiliary units,and auxiliary power switching of two 600 000 kW units,makes the systematical demonstration on auxiliary power switching of two 600 000 kW units,and through relevant electric calculation and analysis,verifies the rationality of start/standby power scheme,and points out the reasonable time of auxiliary power switching of the units in electricity generating station.