汽轮机DEH电液调节系统的改造方案探讨  

Discussion on modification scheme of DEH electro-hydraulic control system in steam turbine

作　　者：高桂英[1] 刘涛[1] Gao Guiying;Liu Tao(Thermal Power Plant of Daqing Petrochemical Company,Daqing 163714,China)

机构地区：[1]大庆石化公司热电厂,黑龙江大庆163714

出　　处：《炼油与化工》2017年第3期51-52,共2页Refining And Chemical Industry

摘　　要：某热电厂4~#汽轮发电机组液压调节控制系统进行DEH电液改造安装后,调试过程中保护装置与原机械保护匹配不协调。在进行机械保护超速试验时机械保护跳闸而联动DEH隔膜阀保护拒动问题,造成机械保护失灵,在失去机械超速保护后,机组不允许投入运行,针对该问题进行研究,提出对策。After DEH(electro-hydraulic)modification and installation was made to the hydraulic pressure control system of4#steam turbine generator unit,the protector and the original mechanical protection were uncoordinated during testing.Duringoverspeed test of mechanical protection,the mechanical protection tripped,and DEH diaphragm valve protection refused to work,this caused mechanical protection out of order.After losing mechanical protection,the generator unit was not allowed to put intooperation.Countermeasures were proposed aiming at this problem.

关 键 词：汽轮机 机械保护 隔膜阀 DEH 系统 

分 类 号：TK263.72[动力工程及工程热物理—动力机械及工程]