CAJ | 학술논문

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。
위해결배전망소전류접지계통적단상접지고장정위난제，연발료일투기우무선통신적배전망단상접지고장정위계통，해계통주요포괄선로측량단원화감공주참2부분。선로측량단원안장재배전망각주요절점상，감공주참배치재변전참중。해계통통과ZigBee모괴실현단원자절점지간적통신，통과GPRS모괴실현측량단원여주참적통신，전망통과GPS실현동보채양。해계통괄용우다충고장정위방법，능구실현전기량동보채집、무선통신、수거존저、상태감측화고장정위등공능。여정위계통상대응，환제출일충“선정단，후정위”적고장정위사상。이론분석、PSCAD방진화동모실험험증료해계통화소제고장정위사상적정학성화유효성。
In allusion to the difficulty of single-phase earth fault location in distribution system with non-solidly earthed network, a wireless communication based single-phase earth fault location system composed of line-measuring units and a monitoring station is developed. The line-measuring units are installed at main nodes of the distribution system and the monitoring station is configured in substation. In the developed system the communication among line-measuring units is implemented by ZigBee module and the communication among line-measuring units and monitoring station is implemented by GPRS module, and the synchronization of the sampling in the whole distribution system is implemented by GPS. The developed fault location system is suitable for various kinds of fault locations and by which such functions as synchronized sampling of electric operating parameters, wireless communication, data storage, operational state monitoring and fault location can be realized. Corresponding to the fault location system, a thinking of fault location, namely firstly determining the branch where fault occurs and then locating the fault, is proposed. The correctness and effectiveness of the proposed fault location thinking are validated by the results of theoretical analysis, PSCAD-based simulation and dynamic simulation experiments.