配网带电远程智能检测系统的设计与实现

Design and Implementation of the Charged Remote Intelligent Monitoring System for Distribution Networks

配网在电力系统中具有重要作用,通常通过带电检测对其运行情况进行监测,以便于日常维护。传统检测系统需要大量的布线,不仅实现过程复杂,而且存在一定的安全隐患,为此,设计并实现了一种配网带电远程智能检测系统。给出系统总体设计,选用具有良好一次电光效应特性的铌酸锂晶体设计了无源集成的光电电压传感单元以及使用该单元的非接触式过电压监测传感器,通过相位合成完成分相检测,实现准确判断、显示全带电或缺相带电状态。利用单片机自动实现电磁闭锁,采用点阵图形式的LCD对检测结果进行显示,通过89C51单片机内集成的串行端口实现远程通信,将配网供电状态反馈至上位机,完成配电网带电的远程检测。软件设计中,给出了系统软件开发平台,详细介绍了信号采集的源代码。实验结果表明,所设计系统检测结果的一致性较好,达到了较高的检测准确度。

Distribution network plays an important role in the power system,and to facilitate the everyday maintenance the live（charged） detection is usually used to monitor its running situation.Traditional detection system needs a lot of wiring,and its implementation process is not only complex,but also has certain hidden security dangers.To this end,a charged remote intelligent distribution network test system is designed and implemented.With the overall system design given and selection of the lithium niobate crystal of good Electra-optical properties,the passive integrated optical voltage sensing unit and the non-contact overvoltage monitoring sensor used in the unit are designed,and the phase detection is made through phase synthesis to realize the accurate judgment and display of the fully charged or phase deficient charged state.The single ship micro-computer is used to realize the automatic electromagnetic lock and the dot matrix graphic LCD is used to display the detection result and the remote communication is realized through the serial port integrated in the 89C51 single-chip computer and the power supply state of the distribution network is fed to the upper monitor,thus the remote live detection of the distribution network is completed.The system software development platform is given in the software design,and the source code of the signal acquisition is introduced in detail.The experimental results show that the designed system has good consistency and high detection accuracy.