应用无线传感网络的分布式电力系统接地状态监测

Distributed Detection of Ground State Using Wireless Sensor Networks

为提高检修工作的可靠性,针对变电站线路检修时倒闸操作和挂接地线的情况,研发了一套接地检测与管理系统,系统基于非接触传感和ZigBee无线局域网络技术,采用双钳口法测量激励、检回信号,节点可以移动技术,最大限度减少了系统线路的铺设与维护;在建立了应用于接地状态检测中的无线传感器网路结构模型后,给出了无线传感网络接地检测系统的硬件设计与软件实现方法,该系统实现了状态检测、分析、管理、集中显示各点接地状态等功能。理论分析和仿真结果表明,系统数据采集链路的传输可靠性,系统数据会聚时延,接地电阻测量精度,网络节点的维护等指标均达到较高水平,系统满足电力系统对接地状态实时监控的要求。

For the improvement of the retiability of maintenace for the substation switching operation in the situation of the articulated ground,we research and develop a ground detection and management system based on the non-contact sensing and ZigBee wireless local area network technology.The system measures the power and check-back signals with two clamps,and node can be moved to minimize line laying and maintenance of the system.Structure model of ground state detection based on wireless sensor networks is presented,and the hardware design and software realization of ground detection and management system is introduced.The system can realize functions of state detection,analysis,management and display.According to the requirements of end-to-end delay,reliability,accuracy in power system fault detection,simulation results indicate that it is feasible to implement power system ground detection.