作　　者： ; ; ; ;

机构地区： 西安工程大学电子信息学院

出　　处： 《华东电力》 2014年第6期1180-1185,共6页

摘　　要： 在线监测电容型高压设备的介质损耗(简称介损)是判断其绝缘状况的有效手段。其介损值或阻性电流值的测量精度与电容型设备各分系统(如PT与MOA等监测终端)的采样数据密切相关,而各分系统之间的采样时间同步是对监测数据的有效性与准确性最基本的保证。本文采取IRIG-B码对时方案来实现分系统的采样同步,并采用CPLD作为IRIG-B码编码与解码的控制芯片。介绍了该方案中IRIG-B码对时的结构设计、编码与解码的原理以及方案用于实验和现场的结果分析。阐述了该对时方案的优点。 Online monitoring of dielectric loss angle( δ) is an effective measure to assess the insulation condition of HV capacitive apparatus. The measurement precision of the dielectric loss value or resistance current value is closely related with the sampling data of each subsystem( such as PT and MOA),and the synchronization of sampling time between each subsystem is the basic guarantee of the effectiveness and accuracy of monitoring data. This paper adopts the plan of the time synchronization with IRIG-B to realize the system time synchronization,and uses CPLD as the control chip in coding and decoding of IRIG-B. It introduces the structure design and the principle of encoding and decoding in the time synchronization with IRIG-B,and also analyzes the results of the plan application in the experiment and field. This plan has many advantages,including high measurement accuracy,simple hardware design,low cost,high practicability,etc.

关 键 词： 在线监测 电容型高压设备 介质损耗 码对时方案 控制芯片

领　　域： [电气工程]