提出一种利用采样值改进相关系数的单相自适应重合闸方法,可以准确识别出各种运行方式下发生的瞬时性故障和永久性故障.在分析单相瞬时接地和永久接地,线路两端短路器跳开后的电气量的基础上,利用经过滤波的采样值,进行相关性的分析。以此来判别故障的性质。MATLAB仿真验证该算法的可行性,易于硬件实现. This paper presents a single-phase adaptive reclosing method based on sampling values ​​to improve the correlation coefficient, which can identify instantaneous faults and permanent faults in various operating modes accurately.After analyzing single-phase instantaneous grounding and permanent grounding, On the basis of the electrical quantity after the short circuit breaker jumps open, utilize the sampled value that is filtered, carry on the analysis of correlation. In order to determine the nature of the fault. MATLAB simulation to verify the feasibility of the algorithm, easy to implement hardware.