为解决配电网小电流接地系统的单相接地故障定位难题，研发了一套基于无线通信的配电网单相接地故障定位系统，该系统主要包括线路测量单元和监控主站2 部分。线路测量单元安装在配电网各主要节点上，监控主站配置在变电站中。该系统通过ZigBee 模块实现单元子节点之间的通信，通过 GPRS 模块实现测量单元与主站的通信，全网通过 GPS 实现同步采样。该系统适用于多种故障定位方法，能够实现电气量同步采集、无线通信、数据存储、状态监测和故障定位等功能。与定位系统相对应，还提出一种“先定段，后定位”的故障定位思想。理论分析、PSCAD 仿真和动模实验验证了该系统和所提故障定位思想的正确性和有效性。 In order to solve the problem of single-phase grounding fault location of low-current grounding system in distribution network, a single-phase grounding fault location system of distribution network based on wireless communication is developed. The system mainly includes line measurement unit and monitoring master station. The line measuring unit is installed on the main nodes of the distribution network, and the main monitoring station is configured in the substation. The system realizes the communication between the sub-nodes of the unit through the ZigBee module, the communication between the measuring unit and the master station through the GPRS module, and the synchronous sampling of the whole network through GPS. The system is suitable for many kinds of fault location methods, and can realize the functions of synchronous electrical data acquisition, wireless communication, data storage, condition monitoring and fault location. Corresponding to the location system, a fault location idea of “segment first, location later” is also proposed. Theoretical analysis, PSCAD simulation and dynamic model experiment verify the correctness and effectiveness of the system and the proposed fault location idea.