UHVDC输电线路低零值绝缘子带电检测方法
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郑云龙(1993-),男,硕士研究生,主要从事输电线路带电作业技术等研究;E-mail:yunlongzheng@foxmail.com

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TM216

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国家自然科学基金(50977003);湖南省教育厅科学研究项目(15C0031)


Research on live detection method of zero insulator for UHVDC transmission line
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    摘要:

    针对特高压直流输电线路绝缘子绝缘电阻在线带电检测的难题,提出一种利用机械装置带电测量特高压直流输电线路绝缘子绝缘电阻的新方法,并研发出一款输电线路低零值绝缘子检测机器人。该方法利用等电位作业的理念,通过机器人的双臂以及机身对待测绝缘子搭建旁路回路,避免泄露电流对检测回路的干扰,提高测量的精度。利用机器人自身的机械结构设计以及硬件电路的的配合,完成对绝缘子阻值的测量、存储与传输;同时,建立离散拟合函数对数据精确化,保证检测结果的准确性;最后研制出样机进行对比试验。试验结果表明:机器人测量法能准确地测量运行中的绝缘子阻值,且误差控制在5%以内,进而分辨绝缘子的优劣状况,实现低零值绝缘子的在线预警。

    Abstract:

    In order to solve the on-line detection problem of insulator insulation resistance for UHVDC transmission lines, a new method of measuring insulation resistance of UHVDC line insulators by using live robots is proposed, and a low zero value insulator detection robot for transmission lines is developed. By using the method of equipotential operation, a bypass circuit for the tested insulator is built with the arms and body of the robot. The interference of leakage current to the tested circuit is eliminated and the measurement accuracy is improved by using this method. The measurement, storage and transmission of insulator resistance information are completed by using the mechanical structure design of the robot itself and the cooperation of hardware circuit. Meanwhile, the discrete fitting function is established to accurately calculate the data, thus the accuracy of the test results is ensured. Finally, a prototype is developed for comparative test. The test results show that the robot measurement method can accurately measure the insulators resistance in operation, and the error is controlled within 5%. Then, the operating condition of insulators can be judged, and the online warning of low-zero insulators can be realized.

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郑云龙,罗日成,邹明. UHVDC输电线路低零值绝缘子带电检测方法[J].电力科学与技术学报,2022,(2):197-204. ZHENG Yunlong, LUO Richeng, ZOU Ming. Research on live detection method of zero insulator for UHVDC transmission line[J]. Journal of Electric Power Science and Technology,2022,(2):197-204.

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  • 在线发布日期: 2022-05-26
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