摘要
DL/T 684—2012《大型发电机变压器继电保护整定计算导则》(以下简称“2012版《导则》”)对提高发电机变压器继电保护装置的正确动作率、保障发电厂电气设备的安全运行发挥了重要作用。然而随着我国发电机组单机容量的增大以及一些新故障情况的出现,2012版《导则》也暴露了一些不适应的问题,需要对其进行修订,以便更好地指导工程实践。为此,分析2012版《导则》存在的问题,并提出具体的修订建议,以解决发电机比率差动保护在和应涌流情况下误动作、经消弧线圈接地的发电机组定子接地保护在系统侧接地故障切除后误动作、误上电保护在同期条件较差时误动作、主变间隙零序电流保护在线路瞬时性单相接地故障重合闸前跳开主变压器等问题。所提建议可为2012版《导则》修订提供参考。
DL/T 684—(hereinafter referred to a2s01th2e“Guide of Calculating Settings of Relay Protection for Large Generator Transformer 2012 Guide”)has played a significant role in improving the correct operation rate of relay protection devices for generator transformers and ensuring the safe operation of electrical equipment in power plants.However,with the increase in capacity of individual generator units in China and the emergence of new faults,the“2012 Guide”has proved inadequate,requiring revision to better guide engineering practice.Therefore,this paper analyzes the problems in the“2012 Guide”and puts forward specific revision suggestions to address prob⁃lems such as misoperation of generator differential protection under sympathetic inrush current,misoperation of false power-on protection under poor synchronous conditions,and tripping of gap zero-sequence current protection of main transformer before reclosing in the case of transient single-phase ground faults on the line.The suggestions can provide reference for the revision of the“2012 Guide”.
作者
陈俊
桂林
陈邦强
兀鹏越
陈延云
CHEN Jun;GUI Lin;CHEN Bangqiang;WU Pengyue;CHEN Yanyun(College of Electrical Engineering and Control Science,Nanjing Tech University,Nanjing 211816,China;Department of Electrical Engineering,Tsinghua University,Beijing 100084,China;Shanghai Liqian Electric Power Technology Co.,Ltd,Shanghai 201599,China;Xi’an Thermal Power Research Institute Co.,Ltd.,Xi’an 710054,China;China Datang Corporation Science and Technology Research Institute Co.,Ltd.East China Branch,)
出处
《浙江电力》
2024年第7期3-9,共7页
Zhejiang Electric Power
基金
国家自然科学基金资助项目(52077115)。
关键词
发电机差动保护
定子接地保护
失步保护
逆功率保护
误上电保护
定子过负荷保护
负序过负荷保护
主变压器间隙零序保护
generator differential protection
stator grounding protection
out-of-step protection
reverse power pro-tection
false power-on protection
stator overload protection
negative sequence overload protection
gap zero-sequence protection of main transformer
