电网瞬时故障时汽轮机汽门快控误动作原因分析  

Cause Analysis on Steam Turbine Valve Control Misoperation during Grid Instantaneous Faults

作　　者：张宝[1] 杨涛[1] 项谨[1] 樊印龙[1] 顾正皓[1] 徐峰 刘晓晟[1] 

机构地区：[1]国网浙江省电力公司电力科学研究院,浙江杭州310014 [2]浙江浙能乐清发电有限责任公司,浙江乐清325609

出　　处：《中国电力》2014年第5期25-28,34,共5页Electric Power

摘　　要：介绍几起电网瞬时故障时汽轮机汽门快控误动作事件,结合电网故障时的录波数据,对几种不同型式的功率变送器进行测试。结果表明,输入信号快速变化时,某些功率变送器输出值会发生畸变,畸变的方向与幅值跟何相故障、故障时刻、功率变送器接线型式与生产厂家有关,电网故障信息可能被放大,这是造成诸多机组汽门快控功能误动作的根本原因。根据测试结果,对功率变送器的选择和使用提出相关建议。In this paper, several steam turbine fast valve control misoperation events caused by grid instantaneous failures are introduced. In combination with the grid fault record data, several power transmitters of different types are tested. The result shows that when the input signal changes rapidly, distortion happens in the output value of some power transmitters with the distortion direction and amplitude relevant to the phase of faults, fault time, power transmitter connection type and the manufacturer such that the grid fault information may he amplified, which is the root cause of the fast valve control misoperation events. Based on the test results, some suggestions are put torwanl on the selection and application of power transmitters.

关 键 词：汽轮机 汽门快控 KU功能 PLU功能 功率变送器 

分 类 号：TK268[动力工程及工程热物理—动力机械及工程]