直流滤波器电容器塔的在线监测方案初步探讨  

Preliminary Discussion of On-line Monitoring Scheme for DC Filter Capacitor Tower

作　　者：冯文昕[1] 李道豫 程大印[2] 王华静[2] 陈仲[2] 王钰[2] 

机构地区：[1]中国南方电网有限责任公司超高压输电公司贵阳局,贵州贵阳530000 [2]北京诺德威电力技术开发有限责任公司,北京100070

出　　处：《电力电容器与无功补偿》2016年第5期11-15,共5页Power Capacitor & Reactive Power Compensation

摘　　要：近年电力系统迅速扩大,同时随着高压直流输电技术上取得的突破和交流输电缺陷的进一步凸显,为高压直流输电的广泛应用铺平了道路。直流滤波器电容器塔作为直流输电系统的重要组成部分发挥着重要作用,他可以滤除直流侧的谐波,减少不利影响。在电容器塔的实际运行过程中常发生保护误动的情况,而停电检测又检测不到问题,如此往复影响输电线路的正常运行。基于上述问题,本文提出了对电容器塔进行在线监测的方案,通过监测电容器的端电压和流过的电流,计算电容器的电容值,实时监测电容器的运行状态。根据电容器的运行状态可以提前分析电容器的运行走势,及时开展预防工作,避免不必要的损失。Rapid expansion of electrical power system in recent years and, at the same time ,the breakthrough of HVDC transmission technology and further defect prominent of AC power transmission has paved the way for the wide application of HVDC transmission system. As an important part of HVDC sys tem,DC filter capacitor tower plays an important role,not only in filtering the harmonic in DC side, but also in reducing the adverse effects. The malfunction of the protection is often occurred in the actual operation of the capacitor tower and the problem cannot be detected with power off and the normal operation of the transmission line is affected by the repeating effect. Based on the above issues, the online monitoring scheme for capacitor tower is proposed in this paper to calculate capacitance of capacitor and real-time monitor the operation status of capacitor by way of monitoring end voltage and the flow current of capacitor. The operation trend of the capacitor can be analyzed in advance in accordance with the operation status of the capacitor, develop preventive work timely and avoid unnecessary loss.

关 键 词：直流滤波器 电容器塔 在线监测 电容分压器 环形电流互感器 

分 类 号：TM53[电气工程—电器] TM721.1