汽包水位保护逻辑改造在三河发电厂的应用  

Application of Logic Retrofit of Drum Water Level Protection in Sanhe Power Plant

作　　者：吴金辉 

机构地区：[1]北京国华三河发电有限责任公司,河北省三河市065201

出　　处：《电力设备》2006年第6期74-76,共3页Electrical Equipment

摘　　要：原汽包水位保护系统为三取中逻辑,不能准确判断汽包水位变送器的质量。根据国家电力公司颁布的《防止电力生产重大事故二十五项重点要求》,将汽包水位保护系统进行了改造,引入分散控制系统(DCS),实现了三取二逻辑控制,并能够实现当1个变送器退出时自动转为二取一,当2个变送器退出时自动转为一取一的逻辑转换,提高了判断汽包水位变送器运行情况的质量,有效地防止了水位保护的拒动和误动。The original protection system of drum water level was the logic of ＂taking the middle from three＂,which couktn＇ t judge the quality of transducer of drum water level accurately.According to the《Twenty -free Key Requirements for Prevention of Major Failures of Power Production》promulgated by National Power Corporation, the protection system of drum water level was retrofitted, and the distributed control system（DCS）was introduced,to realize the logic of＂ taking two from three, and being able to realize the logic transfer＂ to transfer auto matically to＂taking one from two＂when one transducer withdraws,and to transfer automatically to＂taking one from one＂ when two transducer withdraw. This retrofit haaproved the judgement quality of operation situation of drum water level transducers, effectively preventing the malfunction and operation rejection of drum water level protection.

关 键 词：汽包水位保护 三取二 发电厂 

分 类 号：TK223.13[动力工程及工程热物理—动力机械及工程]