DL/T 684-2012《大型发电机变压器继电保护整定计算导则》修订探讨OACSTPCD
Discussion on the revision of DL/T 684-2012 guide of calculating settings of relay protection for large generator and transformer
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 684-2012 Guide of Calculating Settings of Relay Protection for Large Generator Transformer(hereinafter referred to as the"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".
陈俊;桂林;陈邦强;兀鹏越;陈延云
南京工业大学 电气工程与控制科学学院,南京 211816清华大学 电机工程与应用电子技术系,北京 100084上海利乾电力科技有限公司,上海 201599西安热工研究院有限公司,西安 710054中国大唐集团科学技术研究总院有限公司华东电力试验研究院,合肥 230601
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 protectionstator grounding protectionout-of-step protectionreverse power pro-tectionfalse power-on protectionstator overload protectionnegative sequence overload protectiongap zero-sequence protection of main transformer
《浙江电力》 2024 (007)
3-9 / 7
国家自然科学基金资助项目(52077115)
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