300MW机组并网控制逻辑的分析及改进

Analysis and improvement on synchronizing and closing logic of 300 MW units

鲤鱼江电厂2台300MW机组的运行方式较特殊———带厂用电运行,又连接湖南电网运行、广东电网运行。这种并网运行过程复杂,要求的安全等级程度高,为此,分析鲤鱼江电厂汽轮机数字电液调节系统(DEH)和电气控制系统(ECS)中相关的并网逻辑和主汽门-调节门切换逻辑,指出其设计中存在的不足之处,并提出相应的改进方案。

The two 300 MW units in Liyujiang Power Plant have three running modes each, i.e. operation with station service, Hunan provincial grid connected operation and Guangdong provincial grid connected operation, which results in complicated running process and high demand on safety. This paper analyzes the synchronizing and closing logic of digital electro-hydraulic (DEH) control system and electric control system(ECS), pointing out the defects in their design, and gives improvement measures as well.