This paper describes a new technique named controlled reclosing in which the peak value and duration time of reclosing current can be controlled to reduce the enormous pressure to power system when reclosing in permanent fault. Based on the analysis to the reclosing current in different voltage phase angles and a fast estimation algorithm for current parameters, a new reclosing strategy named controlled reclosing was proposed in which fault phases were reclosed in turn in optimum voltage phase angle, and the periodic component amplitude of reclosing current was calculated in a very short time and compared with a setting value to find earth fault; and the pair combinations in fault phases were reclosed synchronously in turn in optimum line-to-line voltage phase angle to find the phase-to-phase fault. A new implementation for controlled reclosing using triggered vacuum switch or power electronics switch was proposed. The simulation results showed that the proposed strategy can reduce the peak value and duration time of reclosing current and determined the fault type.

中文翻译：

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受控重合闸策略与实施：无害重合闸

本文介绍了一种称为受控重合闸的新技术，该技术可以控制重合闸电流的峰值和持续时间，以减少永久性故障重合闸时对电力系统的巨大压力。基于对不同电压相角下重合电流的分析和电流参数快速估计算法，提出了一种新的重合策略，称为受控重合，故障相在最佳电压相角下依次重合，周期分量幅值在很短的时间内计算出重合闸电流，并与整定值进行比较以发现接地故障；并以最佳线电压相角依次同步重合故障相中的对组合，以发现相间故障。提出了一种使用触发真空开关或电力电子开关进行受控重合闸的新实现。仿真结果表明，该策略能够降低重合闸电流的峰值和持续时间，确定故障类型。