高压直流输电线路静电场测量装置

UHV DC Transmission Line Electrostatic Field Measuring Device

目前国内外在高压输电线、变电站的验电设备研究较多,而针对高原架接的超高压及特高压验电设备的研究处于起步阶段,相关产品较少。目前国内外在直流输电线路中并没用形成,成熟、可靠的非接触式验电设备,也没有具体的国际标准来借鉴。本文目的是解决电力作业人员在高压输电线路及超高压、特高压下的预警装置的研究,针对环境复杂、接触验电过程困难等难题,该文研制出了基于开关调制技术的非接触式电场传感器。通过对输电线路数学模型的建立,利用COMSOL仿真输电线电场分布情况,结合调理电路对恒定静电场的调制技术。实现了复杂电力环境下,超高压、特高压直流输电线路的电场检测,保障了作业人员安全作业。试验结果表明,该电场测量装置通过控制激励源的调制,可以检测电力作业下的恒定电场和工频电场,实现±500kV超高压直流输电线路的电场测量。

At present, there are many researches on electroscope equipment for high-voltage transmission lines and substations at home and abroad, and the research on ultra-high voltage and ultra-high-voltage electroscope equipment for plateau erection is in its infancy, and there are few related products. At present, there is no use in the direct current transmission lines at home and abroad. Mature and reliable non-contact electroscopes have no specific international standards for reference. The purpose of this paper is to solve the problem of electric power workers' high-voltage transmission lines and early warning devices under ultra-high voltage and ultra-high voltage. In view of the complicated environment and the difficulty of contact electro-induction process, this paper develops a non-contact electric field based on switching modulation technology. sensor. Through the establishment of the mathematical model of the transmission line, the electric field distribution of the transmission line is simulated by COMSOL, and the modulation technique of the constant electrostatic field by the conditioning circuit is combined. The electric field detection of ultra-high voltage and ultra-high voltage direct current transmission lines under complex power environment is realized, which ensures the safe operation of the operators. The test results show that the electric field measuring device can detect the constant electric field and the power frequency electric field under the electric power operation by controlling the modulation of the excitation source, and realize the electric field measurement of the 500 kV ultra-high voltage direct current transmission line.