Research on Transmission Line Voltage Measurement Method of D-Dot Sensor Based on Gaussian Integral

Sensors

Xianglong Zeng¹  Yanhang Zhao¹  Juan Tang²  Yao Wang²  Xudong Deng²  Wenjiang Li³  Jingang Wang³ 

[1] System Security and New Technology, Chongqing University, Chongqing 400044, China;Maintenance Branch of State Grid Chongqing Electric Power Company, Chongqing 400039, China;;State Key Laboratory of Power Transmission Equipment &

关键词: D-dot sensor;    electric field inverse problem;    transmission line voltage measurement;    Gaussian integral;   

DOI  :  10.3390/s18082455

来源: DOAJ

【 摘 要 】

D-dot sensors meet the development trend towards the downsizing, automation and digitalization of voltage sensors and is one of research hotspots for new voltage sensors at present. The traditional voltage measurement system of D-dot sensors makes possible the reverse solving of wire potentials according to the computational principles of the electric field inverse problem by measuring electric field values beneath the transmission line. Nevertheless, as it is limited by the solving method of the electric field inverse problem, the D-dot sensor voltage measurement system is struggling with solving difficulties and poor accuracy. To solve these problems, this paper suggests introducing a Gaussian integral into the D-dot sensor voltage measurement system to accurately measure the voltage of transmission lines. Based on studies of D-dot sensors, a transmission line voltage measurement method based on Gaussian integrals is proposed and used for the simulation of the electric field of a 220 kV and a 20 kV transmission line. The feasibility of the introduction of the Gaussian integral to solve transmission line voltage was verified by the simulation results. Finally, the performance of the Gaussian integral was verified by an experiment using the transmission line voltage measurement platform. The experimental results demonstrated that the D-dot sensor measurement system based on a Gaussian integral achieves high accuracy and the relative error is lower than 0.5%.

【 授权许可】

Unknown