半波长输电真型线路试验宽频带电压测量方法  

Wide Frequency Band Voltage Measurement for Real Transmission Line Test of Half-wave-length AC Power Transmission

作　　者：刘卫东[1] 韩彬 丁登伟 项祖涛 LIU Weidong;HAN Bin;DING Dengwei;XIANG Zutao(State Key Lab of Control and Simulation of Power System and Generation Equipments, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China;China Electric Power Research Institute, Beijing 100192, China;Sichuan Energy Internet Research Institute, Tsinghua University, Chengdu 610200, China)

机构地区：[1]清华大学电机工程与应用电子技术系电力系统及发电设备控制和仿真国家重点实验室,北京100084 [2]中国电力科学研究院有限公司,北京100192 [3]清华四川能源互联网研究院,成都610200

出　　处：《高压电器》2018年第7期119-122,130,共5页High Voltage Apparatus

基　　金：国家电网公司科技项目(SGXJDK00DJJS1600155)~~

摘　　要：半波长输电工程实施前开展真型线路试验,对半波长输电有关特性进行试验验证,以支撑工程实施十分必要。半波长交流输电真型线路试验时,需要进行输电线路不同位置的工频电压测量和操作暂态电压测量。为此,文中提出了基于电容式电压传感器的输电线路电压测量方法,将电容式电压传感器密封于SF6气体绝缘高压绝缘筒,可实现高电压和宽频带测量,且具有重量轻、便于运输和安装、满足户外运行等特点。对该测量方法的实验研究表明,在50 Hz^100 MHz频段范围内,分压比的变化小于5.7%。To support the engineering application of half-wave-length AC power transmission, real transmission line test is necessary to verify the characteristics.In the test themeasurement of power frequency voltage and switching transient voltage in different middle points of the transmission line is required. It is proposed for this test a high voltage measurement method in which a capacitive voltage sensor is used to realize wide frequency band voltage measurement and the sensor is sealed within a composite insulation sleeve filled with SF6 gas to realize high voltage insulation. This method has the advantages of wide frequency band of voltage measurement, comparatively low weight and suitable for outdoor condition. The frequency response characteristic of the voltage measurement has been experimentally investigated, the change of the voltage divider ratio in the frequency range of 50 Hz-100 MHz is within 5.7%.

关 键 词：半波长交流输电 输电线路 电压测量 电容式电压传感器 频率特性 

分 类 号：TM75[电气工程—电力系统及自动化]