330kV 封闭式组合电器局部放电微机集散监测系统

A COMPUTER DISTRIBUTED PD MONITORING SYSTEM FOR 330kV GIS

本集散系统是为安康水电站３３０千伏变电站封闭式组合电器（ＧＩＳ）局部放电（ＰＤ）的监测研制开发的。该系统已正常运行半年。系统具有自校验，数据采集、处理，数据通信等功能。模拟信号在现场完成Ａ／Ｄ转换，再以数字信号方式送到位于控制室的主计算机。由于在ＲＳ－４８５总线上加入了光电隔离电路，主计算机和各个数据采集单元电气上完全隔离。系统具有较高的抗干扰能力和可靠性。

This system is designed for partial discharge (PD) monitoring for Ankong hydropower plant 330kV gas insulated switchgears (GIS). This system has been worked well for half a year. The system has the capability of self testing, data sampling, data processing and communication. Analogue signals were converted to digital signals by data sampling units on site and then transmitted to the computer in control room. The host computer and sampling units were separated electrically by adding photocoupler circuits to RS 485 bus interfaces. This system has strong resistance to interference and is reliable.