180MW燃气-蒸汽联合循环机组汽轮机并网带初负荷故障分析

ANALYSIS OF FAULTS OCCURRED IN SYNCHRONIZATION WITH POWER NETWORK FOR TAKING INITIAL LOAD BY STEAM TURBINE OF A 180MW GAS AND STEAM TURBINE COMBINED CYCLE UNIT

通过对月亮湾电厂 2号机组并网过程中不定期出现的带初负荷故障情况进行分析 ,查明故障原因为DEH不能同步接受并网信号所致。经对ETS和DEH相应组态控制逻辑改进 。

Through analysis of faults casually occurred in the course of synchroniztion with power network for taking initial lood by unit No 2 in Yueliangwan Power Plant, it was found that the cause leading to fault is the digital electro-hyolraulic (DEH) regulation system can't synchronously receive signal for parallel connection with power network. Through improvement of control logic configuration corresponding to the emergency trip system (ETS) and the DEH system. the control function for said unit in the course of synchronization with power network can be normally maintained.