基于线性滤波法的直流输电地电位分布研究  

Study on ground potential distribution of DC transmission based on linear filtering method

作　　者：徐碧川 张益赓 张宇 童军心 潘卓洪[2] 鲁海亮 XU Bichuan;ZHANG Yigeng;ZHANG Yu;TONG Junxin;PAN Zhuohong;LU Hailiang(Jiangxi Electric Power Research Institute of State Grid Corporation of China,Nanchang 330006,China;School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China)

机构地区：[1]国网江西省电力有限公司电力科学研究院,江西南昌330006 [2]武汉大学电气与自动化学院,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2020年第9期794-798,共5页Engineering Journal of Wuhan University

基　　金：国家自然科学基金项目(编号:51607129)。

摘　　要：随着长距离大容量的特高压直流输电工程不断建设投运,其引起的直流偏磁问题也越来越严重,分析直流偏磁问题的重点与难点离不开求解直流接地极的空间电位等电磁兼容参数,这也属于目前研究的热点和难点。首先从空间电位分布的理论推导出发,得到了直流接地极空间电位分布的理论公式,然后提出使用210点线性滤波法求解直流接地极的空间电位分布。最后通过实际算例,分析了此种方法在计算效率、求解精度、运算速度和应用场景上的表现,并验证了该方法的正确性。与商用的接地计算软件CDEGS对比,该方法展现了良好的数值性能和一致性,为直流接地极空间电位分布的计算提供了有效的基础手段。With the continuous construction and operation of long-distance and large-capacity high voltage direct current(HVDC)transmission projects,the DC bias problems caused is becoming more and more serious.The key and difficulties in analyzing the DC bias problem are inseparable from solving the space potential of the DC grounding electrode,which is also a hot and difficult point in current research.First,based on the theoretical derivation of spatial potential distribution,the theoretical formula of the spatial potential distribution is obtained.Then,a 210-point linear filtering method is proposed to solve the spatial potential distribution of the DC grounding electrode.Finally,the practical examples are used to analyze the performance of the method in terms of computational efficiency,solution accuracy,computational speed and application scenarios to verify the correctness of the method.Compared with the commercial grounding calculation software CDEGS,the method proposed shows good numerical performance and consistency,and can provide an effective basis for the calculation of the spatial potential distribution of DC grounding electrode.

关 键 词：直流接地极 空间电位 线性滤波法 CDEGS 大地返回运行方式 

分 类 号：TM721[电气工程—电力系统及自动化]