给煤机低电压扰动跳闸原因分析与改进  

Tripping Analysis and Improvement on Coal Feeders When Low Voltage Disturbance Occuring

作　　者：毕明波 吴斌 

机构地区：[1]神华内蒙古国华呼伦贝尔发电有限公司,内蒙古呼伦贝尔021025

出　　处：《内蒙古电力技术》2012年第5期83-85,共3页Inner Mongolia Electric Power

摘　　要：神华内蒙古国华呼伦贝尔发电有限公司2台600 MW机组因低电压扰动导致MFT动作、给煤机跳闸,分析认为给煤机跳闸原因为给煤机控制板失电。对给煤机控制回路进行了改进,现场模拟试验及实际扰动均证明,改进后的控制系统可成功避免因系统低电压扰动造成的MFT触发、给煤机全停事故的发生。Two 600 MW units MFT action and tripping of coal feeder due to low voltage disturbance occured in Inner Mongolia Guohua Hulun Buir Power Co.,Ltd.,and the coal feeder tripping reason was coal feeder＇s control panel power loss.The coal feeder control circuits were improved,the scene simulation test and the actual disturbance proved that the improved control system could avoid the MFT trigger and coal machine shutdown accident successfully caused by the system low voltage disturbance.

关 键 词：给煤机 低电压扰动 控制回路 MFT DCS 变频器 

分 类 号：TM714[电气工程—电力系统及自动化]