宁夏电力
寧夏電力
저하전력
NINGXIA ELECTRIC POWER
2013年
5期
8-11
,共4页
换流站%并联电容器%滤波器保护%选相合闸
換流站%併聯電容器%濾波器保護%選相閤閘
환류참%병련전용기%려파기보호%선상합갑
converter station%shunt capacitor%filter protection device%phase selection switch on
针对换流站无功设备自动投切过程中发生的一起滤波器差动保护单套保护跳闸事件,基于并联电容器保护配置和交流滤波器选相合闸装置原理,对跳闸原因进行深入分析。分析结果表明:并联电容器选相合闸装置未在B相电压过零点合闸,同时并联电容器差动保护未躲过短时冲击电流,以及保护装置对高频电流过滤处理不充分是导致单套保护装置跳闸的根本原因。
針對換流站無功設備自動投切過程中髮生的一起濾波器差動保護單套保護跳閘事件,基于併聯電容器保護配置和交流濾波器選相閤閘裝置原理,對跳閘原因進行深入分析。分析結果錶明:併聯電容器選相閤閘裝置未在B相電壓過零點閤閘,同時併聯電容器差動保護未躲過短時遲擊電流,以及保護裝置對高頻電流過濾處理不充分是導緻單套保護裝置跳閘的根本原因。
침대환류참무공설비자동투절과정중발생적일기려파기차동보호단투보호도갑사건,기우병련전용기보호배치화교류려파기선상합갑장치원리,대도갑원인진행심입분석。분석결과표명:병련전용기선상합갑장치미재B상전압과영점합갑,동시병련전용기차동보호미타과단시충격전류,이급보호장치대고빈전류과려처리불충분시도치단투보호장치도갑적근본원인。
Aiming at an single set protection of filter differential protection trip fault happend in the reactive power equipment automatic switching process in converter station, base on the deployment of shunt capacitor protection device and phase selection switch on device principle of AC filter, deeply analyzes the trip causes. The analysis result shows that the ultimate causes of the trip are following:phase selection switch on device of shunt capacitor doesn’t switch on when B phase voltage passed ze-ro value, simultaneously shunt capacitor differential protection doesn’t avoid short time shock cur-rent, and the protection device filtration for high frequency current is insufficient.