计及趋肤效应的套管载流结构损耗分析  

Analysis on Active Power Loss of Bushing Conductor Considering Skin Effect

作　　者：杜林[1] 张科 冯辉 贺鹏 曹雅玮 杨峰 Du Lin;Zhang Ke;Feng Hui;He Peng;Cao Yawei;Yang Feng(State Key Laboratory of Transmission and Distribution Equipment and System Safety and New Technology Chongqing University,Chongqing 400044 China;State Grid Hunan Electric Power Co.Ltd,Changsha 410004 China;Tianfu New District Power Supply Company State Grid Sichuan Electric Power Company,Chengdu 610000 China;School of Engineering and Technology Southwest University,Chongqing 400716 China)

机构地区：[1]输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆400044 [2]国网湖南省电力有限公司,长沙410004 [3]国网四川省电力公司天府新区供电公司,成都610000 [4]西南大学工程技术学院,重庆400716

出　　处：《电工技术学报》2023年第17期4746-4756,共11页Transactions of China Electrotechnical Society

摘　　要：高比例新能源和高比例电力电子设备特征下的新型电力系统谐波问题日益显著,实际通过套管等电力设备载流结构的电流含有大量高次谐波,趋肤效应作用下谐波电流会产生较大的有功损耗。为了研究谐波电流下套管载流结构的有功损耗特性,建立计及趋肤效应影响的套管载流结构电阻计算模型;理论推导和试验验证了复杂多次谐波电流作用下套管载流结构有功损耗计算方法;仿真获取了换流变阀侧套管电流波形,结合载流导体实际结构进行了有功损耗定量计算。结果表明,与基波电流相比,谐波电流产生的功率损耗比例远大于谐波含量比例,趋肤效应作用下谐波电流对套管载流结构有功损耗具有显著的增强作用。With the increasing proportion of new energy in the power grid and the access characteristics of a large number of power electronic equipment,the problem of new power system harmonics becomes increasingly significant.The actual current passing through the current carrying structure of power equipment such as sleeve contains a large number of high order harmonics.As a very important electrical equipment in power system,high voltage bushing is used for ground insulation of incoming and outlet lines of power equipment such as transformers,reactors and circuit breakers,and high voltage circuit crossing walls.This paper takes the active power loss of bushing under the action of harmonics as the starting point,and considers the enhancement effect of skin effect on harmonic loss of current-carrying conductor.The active power loss characteristics of casing current carrying structure under harmonic current are studied.Firstly,based on the basic electromagnetic field theory,the calculation model of the harmonic resistance and active power loss of the current carrying structure of the casing is established,and the superposition of the active power loss of the casing under different harmonic components and the correctness of the calculation method of the active power loss of the current carrying structure under the consideration of skin effect are verified theoretically and experimentally.Finally,based on the current waveform obtained by simulation,the active power loss of the current carrying structure of the casing was quantitatively calculated,and the enhancement coefficient of the harmonic current on the active power loss of the current carrying structure under skin effect was proposed to correct the active power loss of the current carrying structure of the casing.From a theoretical point of view,the superposition of the active power loss of the current structure and the change rule of harmonic resistance were verified by taking into account the influence of skin effect and the effect of harmonic current,and the superpo

关 键 词：趋肤效应 套管 有功损耗 谐波 

分 类 号：TM855[电气工程—高电压与绝缘技术]