基于金属化膜法的输电线路电晕损耗在线监测系统研究  

Online Corona Loss Monitoring System of High Voltage Transmission Line Based on Metallized Membrane Method

作　　者：王明松[1] 刘海沧[1] 罗勇芬[1] 张源斌[1] 李锐海 王国利 曹蕤[3] 

机构地区：[1]西安交通大学电气工程学院,西安710049 [2]特高压工程技术国家工程实验室,广州510080 [3]西安高压电器研究院有限责任公司,西安710077

出　　处：《高压电器》2014年第3期1-5,共5页High Voltage Apparatus

基　　金：特高压工程技术(昆明;广州)国家工程实验室开放基金资助~~

摘　　要：在提出的基于金属化膜的输电线路电晕损耗监测方法基础上,研制了一套在线监测系统,它包括主机、导线电压采集模块和电晕电流采集模块3部分。电晕电流采集模块放置在高压输电线上,采集各分裂导线的电晕电流转化的电压信号,该信号由并联在薄膜金属镀层和分裂导线之间的采样电阻得到。电压采集模块放置在变电站内,采集输电导线的电压。2个模块的采集由GPS的秒脉冲上升沿触发同步,且均通过GPRS无线传输方式将数据传输至移动通讯网的公共端口。远端上位主机通过有线网络访问该公共端口,将其存储的电压、各分裂导线的电晕电流数据按照瞬时功率算法计算出单位长度各分裂导线的电晕损耗,以及折算线路电晕损耗。实验表明,该系统能准确测量输电线路电晕损耗。基于金属化膜的输电线路电晕损耗监测技术的研究,为后续对超特高压输电线路进行不同气候和环境条件下的电晕及其效应展开研究奠定了基础。Based on the presented metallized membrane method for measuring corona leakage current of AC/DC transmission line, an on-line monitoring system is developed, which includes three components, i.e. the upper computer, the lead line voltage acquisition module, and the corona leakage current acquisition module. The corona leakage current acquisition module is located on overhead line to sample the voltage signal translated from corona leakage current on the resistor paralleled between respective bundle conductor and metallized membrane coat. The lead line voltage acquisition module is put in transformer substation for sampling the conductor voltage. Both modules are synchronized in sampling by the rising edge of PPS （pulse per second） emitted by the global position system （GPS）, and their data are sent to the public port of mobile telephone network with GPRS wireless telecommunicatioru The data of conductor voltage and corona currents of the bundle conductors stored in the public port are accessed by remote upper computer to calculate the corona loss of each metallized coat bundle conductor in unit length, and to further calculate the corona loss of whole llne. Experimental results show that the proposed system is accurate. This study may provide a foundation for future research of corona and its effect of high voltage transmission line.

关 键 词：金属化膜法 电晕损耗 在线监测 同步 

分 类 号：TM755[电气工程—电力系统及自动化]