【摘要】：介紹了距離保護應(yīng)對過負荷策略的實施方案,根據(jù)過負荷與對稱故障、不對稱故障、相間故障、單相接地故障的特征分別進行處理。首先利用U1cosφ1識別對稱故障與過負荷,利用電流不對稱度識別過負荷與不對稱故障;然后利用正序功率識別故障點位置,對于相間距離保護,利用相間Uijcosφij(ij=AB,BC,CA)識別相間故障與過負荷,對于接地距離保護,采用相Uicosφi(i=A,B,C)、正序補償電壓與相補償電壓關(guān)系識別單相接地與過負荷。利用RTDS建立了仿真模型,模擬了對稱過負荷、不對稱過負荷及過負荷期間發(fā)生故障等不同類型故障,仿真結(jié)果表明,本方案過負荷時可靠閉鎖距離保護,故障時快速開放距離保護,耐過渡電阻能力高達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：2484231