Method and Experimental Study of Transmission Line Voltage Measurement Based on a Gauss-Type Integral Algorithm
Wang Jingang1, Yan Xiaojun1, Li Xiang1, Liao Jucheng2, Tao Yaqin2
1. State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing 400044 China; 2. Jiangbei Power Supply Branch of State Grid Chongqing Electric Power Company Chongqing 401147 China
Abstract:Aiming at flaws that existed in the electric field integration method, such as some nodes are too close to the transmission line, the segmentation of the integration domain is inconvenient to calculate, in this paper, a Gauss-type numerical integration method with the given node was proposed, to reduce the difficulty in solving nonlinear equations, optimize the integration node parameters, and improve voltage measuring precision. First, comparing with the prototype method, the Gauss-type calculation models with the given node were established, and the analytical formula with E-field disturbance factors was derived for calculating the node parameters. Then, the E-field distribution was calculated under the transmission line by the electromagnetic simulation software Maxwell. Combining with the conditional factors in the selection of the integral node, the coordinates and the corresponding weights of the nodes were calculated. Finally, a D-dot sensor measurement experimental platform was built and the effectiveness of the proposed method was verified. According to the repeated test results in the voltage range of 5~20 kV, the relative error of the proposed Gauss-type method is less than 0.5%, which means a better measurement performance than the prototype method.
汪金刚, 颜晓军, 李想, 廖巨成, 陶亚琴. 基于一种Gauss型积分算法的输电线路电压测量方法与试验[J]. 电工技术学报, 2021, 36(19): 3978-3986.
Wang Jingang, Yan Xiaojun, Li Xiang, Liao Jucheng, Tao Yaqin. Method and Experimental Study of Transmission Line Voltage Measurement Based on a Gauss-Type Integral Algorithm. Transactions of China Electrotechnical Society, 2021, 36(19): 3978-3986.
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