中文摘要：

可控开断故障电流能有效提高断路器的开断能力和延长其电寿命。断路器可控开断多相故障电流的关键是快速、可靠识别故障类型和故障相。笔者采用相关分析法获得特殊相的正、负序故障分量的相位关系，从而根据相位关系快速、可靠实现确定故障类型和相应故障相：采用MATLAB建立高压断路器开断故障电流模型，对提出的故障选相算法的性能进行了测试验证。测试结果表明，提出算法能够在故障发生后半个周期内准确识别出特定条件下的故障类型和故障相．为同步断路器可控开断故障电流实现提供了理论依据和实现基础．

英文摘要：

Controlled interruption of fault currents can increase the interrupting capacity of high voltage synchronous circuit breakers and prolong the electrical life of circuit breaker contacts. One of the most important factors for controlled interruption of multi-phase fault currents is the detection of fault phase and type. In this paper, the phase position relationship of positive sequence and negative sequence fault components was obtained via correlation analysis to determine the fault phase rapidly and precisely. Furthermore, an interrupting fault current model of high voltage circuit breaker based on MABLAB was constructed to verify the proposed method. The results show that the proposed method can detect the fault phases within the latter half cycle after fault initiation, and may provide theoretical basis and implementation for controlled interruption of fault current.