具备应对过负荷能力的距离保护实施方案
发布时间：2019-05-23 21:08
【摘要】：介绍了距离保护应对过负荷策略的实施方案,根据过负荷与对称故障、不对称故障、相间故障、单相接地故障的特征分别进行处理。首先利用U1cosφ1识别对称故障与过负荷,利用电流不对称度识别过负荷与不对称故障;然后利用正序功率识别故障点位置,对于相间距离保护,利用相间Uijcosφij(ij=AB,BC,CA)识别相间故障与过负荷,对于接地距离保护,采用相Uicosφi(i=A,B,C)、正序补偿电压与相补偿电压关系识别单相接地与过负荷。利用RTDS建立了仿真模型,模拟了对称过负荷、不对称过负荷及过负荷期间发生故障等不同类型故障,仿真结果表明,本方案过负荷时可靠闭锁距离保护,故障时快速开放距离保护,耐过渡电阻能力高达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，
本文编号：2484231
[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，
本文编号：2484231
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