惠州天然气电厂电气设计特点探讨

燃机电厂的显著特点是厂用负荷少 ,布置紧凑 ,其电气设计与常规电厂比较有独特之处。结合惠州天然气电厂的实际情况 ,推荐采用发电机出口断路器 (GCB) ;主变及高厂变不进行有载调压 ;中压厂用母线每机 1段母线 ,双排布置 ,用母线桥连接 ;厂用电系统中性点采用高电阻接地方式 ;全厂公用负荷设 3段 6kV配电装置 ,每机 1段。

Study on Electrical Design Features for Huizhou Combined-cycle Natural Gas Power Plant

The combined-cycle nature gas power plant is characterized with less auxiliary power load and compact arrangement, which has some specialties on electric design compared to the conventional coal-fired power plants. In combination with the concrete conditions in Huizhou Combined-cycle Nature Gas Power Plant the paper recommended the following: application of the generator circuit breaker (GCB); no load voltage regulation for the main transformer and HV auxiliary transformer; one section bus of IV auxiliary busbar for each unit in double row arrangement, which is linked with bus bridge; high resistance grounding mode for the neutral point in the auxiliary power system; common load for the whole plant to be equipped the 3 sections of 6 kV switchgears, each section for each unit.