电力系统自动化
電力繫統自動化
전력계통자동화
AUTOMATION OF ELECTRIC POWER SYSTEMS
2011年
17期
107-110
,共4页
过流保护%零序电流%反时限%整定配合%动态特性%线路保护%变压器保护
過流保護%零序電流%反時限%整定配閤%動態特性%線路保護%變壓器保護
과류보호%령서전류%반시한%정정배합%동태특성%선로보호%변압기보호
over-current protection%zero-sequence current%inverse-time%setting coordination%dynamic characteristics%transmission line protection%transformer protection
从事故分析的角度出发,在全网需设置高阻接地故障保护前提下,提出线路保护、主变压器保护均需配置零序反时限过流保护,并且500kV和220kV电压等级都可采用此配置。同时探讨其整定配合问题,提出了零序反时限曲线中时间常数的选取方法。实时数字仿真器（RTDS）试验用电网实例验证了采用零序反时限过流保护的静态和动态特性。
從事故分析的角度齣髮,在全網需設置高阻接地故障保護前提下,提齣線路保護、主變壓器保護均需配置零序反時限過流保護,併且500kV和220kV電壓等級都可採用此配置。同時探討其整定配閤問題,提齣瞭零序反時限麯線中時間常數的選取方法。實時數字倣真器（RTDS）試驗用電網實例驗證瞭採用零序反時限過流保護的靜態和動態特性。
종사고분석적각도출발,재전망수설치고조접지고장보호전제하,제출선로보호、주변압기보호균수배치령서반시한과류보호,병차500kV화220kV전압등급도가채용차배치。동시탐토기정정배합문제,제출료령서반시한곡선중시간상수적선취방법。실시수자방진기（RTDS）시험용전망실례험증료채용령서반시한과류보호적정태화동태특성。
Configuration of zero-sequence inverse-time over-current protection in transmission lines and main transformers is proposed from view point of fault analysis,under the precondition that high resistance ground fault protections are needed for all power grids.Besides,the same configuration can be also applied to equipments of both 500 kV and 220 kV voltage grade.Then related setting coordination problem is discussed,and the method for selecting time constant from zero-sequence inverse-time curves is derived.In addition,the actual case of power grid is simulated with RTDS to verify the static and dynamic characteristics of the zero-sequence inverse-time over-current protection.
