雷电冲击电压下空心电抗器电压分布特性研究  

Study on voltage distribution characteristics of air-coredreactor under lightning impulse voltage

作　　者：申昱博 张健 陈莉娟 刘骥[3] 刘贺千 张明泽[3] 朱东柏 SHEN Yubo;ZHANG Jian;CHEN Lijuan;LIU Ji;LIU Heqian;ZHANG Mingze;ZHU Dongbai(State Grid Heilongjiang Electric Power Co.,Ltd.Electric Power Research Institute,Harbin 150030,China;State Grid Taicang Power Supply Company,Suzhou 215400,China;Key Laboratory of Engineering Dielectrics and Its Application Ministry of Education,Harbin University of Science and Technology,Harbin 150080,China)

机构地区：[1]国网黑龙江省电力有限公司电力科学研究院,哈尔滨150030 [2]国网太仓市供电公司,江苏苏州215400 [3]哈尔滨理工大学工程电介质及其应用教育部重点实验室,哈尔滨150080

出　　处：《黑龙江电力》2023年第3期204-209,共6页Heilongjiang Electric Power

基　　金：新型抗开裂无环流干式空心电抗器技术研究及应用(项目编号:52243722000Q)。

摘　　要：针对目前空心电抗器雷击过电压下内部绕组电压分布无法定量计算的问题,建立一种适用于空心电抗器结构的高频阻抗网络等效分析模型。根据基尔霍夫基本定律,提出雷击电压下暂态、稳态电压分布的计算方法,能够计算电抗器内雷击电压下的电压分布。以实际并联空心电抗为例,对计算得到雷击电压下的电压分布与实际测试的电压分布进行分析。根据计算结果发现,内外包封中1-2匝线圈的承担电压及不均匀系数均较大,主要与内外侧对地电压引起的电压钳位有关。Aiming at the current problem that the voltage distribution in the internal windings of air-cored reactors under lightning overvoltage cannot be calculated quantitatively,a high-frequency impedance network equivalent analysis model suitable for air-cored reactor structure is established.According to Kirchhoff's basic law,a calculation method for transient and steady state voltage distribution under lightning overvoltage is proposed,which can calculate the voltage distribution within the reactor under lightning overvoltage.Taking an actual parallel air-cored reactor as an example,the voltage distribution under lightning overvoltage calculated and the actual measured voltage distribution are analyzed.Based on the calculation results,it is found that the voltage borne by 1-2 turns of coils in the inner and outer envelopes and the non-uniformity coefficient are both large,which is mainly related to the voltage clamp caused by the inner and outer side voltage to ground.

关 键 词：空心电抗器 雷击过电压 暂态电压 阻抗分布网络 

分 类 号：TM85[电气工程—高电压与绝缘技术]