Load compensation in distance protection of a three-phase power transmission line
    1.
    发明授权
    Load compensation in distance protection of a three-phase power transmission line 有权
    负载补偿在三相输电线路的距离保护

    公开(公告)号:US08159229B2

    公开(公告)日:2012-04-17

    申请号:US12293601

    申请日:2006-10-18

    IPC分类号: G01R31/08 H02H3/00

    CPC分类号: H02H3/402 G01R31/088

    摘要: A load compensation method for phase-to-ground loops in distance protection. A first reactive reach is estimated assuming zero fault resistance or with a positive sequence current. A second reactive reach is estimated with a zero sequence current. A third reactive reach is estimated with a negative sequence current. An import or export condition is estimated. A fourth reactive reach for import or export condition is estimated based on the first, second and third reactive reach. A fault impedance is estimated based on the estimated fourth reactive reach.

    摘要翻译: 一种用于距离保护的相对地环路的负载补偿方法。 假设零故障电阻或正序列电流估计第一反应到达。 以零序电流估计第二反应到达。 用负序电流估计第三个反应到达。 估计进出口条件。 根据第一,第二和第三无效范围估计进出口条件的第四个反应性达到。 基于估计的第四无功覆盖率来估计故障阻抗。

    LOAD COMPENSATION IN DISTANCE PROTECTION OF A THREE-PHASE POWER TRANSMISSION LINE
    2.
    发明申请
    LOAD COMPENSATION IN DISTANCE PROTECTION OF A THREE-PHASE POWER TRANSMISSION LINE 有权
    三相输电线路距离保护的负载补偿

    公开(公告)号:US20100225329A1

    公开(公告)日:2010-09-09

    申请号:US12293601

    申请日:2006-10-18

    IPC分类号: G01R31/08

    CPC分类号: H02H3/402 G01R31/088

    摘要: A load compensation method for phase-to-ground loops in distance protection. A first reactive reach is estimated assuming zero fault resistance or with a positive sequence current. A second reactive reach is estimated with a zero sequence current. A third reactive reach is estimated with a negative sequence current. An import or export condition is estimated. A fourth reactive reach for import or export condition is estimated based on the first, second and third reactive reach. A fault impedance is estimated based on the estimated fourth reactive reach.

    摘要翻译: 一种用于距离保护的相对地环路的负载补偿方法。 假设零故障电阻或正序列电流估计第一反应到达。 以零序电流估计第二反应到达。 用负序电流估计第三个反应到达。 估计进出口条件。 根据第一,第二和第三无效范围估计进出口条件的第四个反应性达到。 基于估计的第四无功覆盖率来估计故障阻抗。