【摘要】：介紹了距離保護(hù)應(yīng)對(duì)過(guò)負(fù)荷策略的實(shí)施方案,根據(jù)過(guò)負(fù)荷與對(duì)稱故障、不對(duì)稱故障、相間故障、單相接地故障的特征分別進(jìn)行處理。首先利用U1cosφ1識(shí)別對(duì)稱故障與過(guò)負(fù)荷,利用電流不對(duì)稱度識(shí)別過(guò)負(fù)荷與不對(duì)稱故障;然后利用正序功率識(shí)別故障點(diǎn)位置,對(duì)于相間距離保護(hù),利用相間Uijcosφij(ij=AB,BC,CA)識(shí)別相間故障與過(guò)負(fù)荷,對(duì)于接地距離保護(hù),采用相Uicosφi(i=A,B,C)、正序補(bǔ)償電壓與相補(bǔ)償電壓關(guān)系識(shí)別單相接地與過(guò)負(fù)荷。利用RTDS建立了仿真模型,模擬了對(duì)稱過(guò)負(fù)荷、不對(duì)稱過(guò)負(fù)荷及過(guò)負(fù)荷期間發(fā)生故障等不同類型故障,仿真結(jié)果表明,本方案過(guò)負(fù)荷時(shí)可靠閉鎖距離保護(hù),故障時(shí)快速開(kāi)放距離保護(hù),耐過(guò)渡電阻能力高達(dá)150Ω。
[Abstract]:This paper introduces the implementation scheme of distance protection strategy to deal with overload, which is dealt with according to the characteristics of overload and symmetrical fault, asymmetric fault, interphase fault and single-phase grounding fault. Firstly, U1cos 蠁 1 is used to identify symmetric fault and overload, and current asymmetry is used to identify overload and asymmetric fault. Then the positive sequence power is used to identify the location of the fault point, for the interphase distance protection, the interphase Uijcos 蠁 ij (ij=AB,BC,CA) is used to identify the interphase fault and overload, and for the grounding distance protection, the phase Uicos 蠁 I (I 鈮，

本文編號(hào)：2484231