串并联混合谐振在500 kV海缆交流耐压试验中的应用  

Application of Series⁃parallel Hybrid Resonance in 500 kV Submarine Cable AC Withstand Voltage Test

作　　者：李乃一 孙翔 金涌涛 杨勇 刘黎 王少华 LI Naiyi;SUN Xiang;JIN Yongtao;YANG Yong;LIU Li;WANG Shaohua(State Grid Zhejiang Electric Power Co.,Ltd.,Research Institute,Hangzhou 310014,China)

机构地区：[1]国网浙江省电力有限公司电力科学研究院,杭州310014

出　　处：《高压电器》2020年第10期247-252,共6页High Voltage Apparatus

基　　金：国网浙江省电力有限公司科技项目(5211DS19002Z)。

摘　　要：文中介绍了世界首条500 kV交联聚乙烯海缆1.7U0、60 min交流耐压试验串并联混合谐振方案及其应用情况。共设计、核算了4种电抗器串并联组合方案,其中3种方案用于应对设备故障、试验电压波动大等现场突发情况。现场试验表明,“2串联3并联1补偿”的电抗器组合方案相比“2串联4并联”,品质因数减小25%、励磁变压器输出电流减小22%、变频电源总输入电流减小20%,两种方案试验频率均为25.5 Hz。同时采取双端电压监测、防电晕波纹管等措施,提出击穿发生时的预案,保证了试验的顺利进行。This paper introduces the series⁃parallel hybrid resonance program and its application for the world’s first 500 kV XLPE submarine cable 1.7U0,60 min AC withstand voltage test.4 reactor series⁃parallel combination pro⁃grams of were proposed and checked.And 3 of them are used for dealing with live emergencies of equipment failure and big fluctuation of test voltage.Compared to“2 series and 4 parallel”reactor combination,the field test shows,for“2 series,3 parallel and 1 compensation”reactor combination,the quality factor decreases 25%,output current decreases 22%and total input current of variable⁃frequency power source decreases 20%.And the test frequency of both programs is 25.5 Hz.Moreover the double⁃end voltage monitoring and anti⁃corona wires were used.The plan when breakdown happens was proposed.All of them assured the successful proceeding of the test.

关 键 词：500 kV海缆 交流耐压试验 串并联混合谐振 试验电流 试验频率 电抗器组合 

分 类 号：TM75[电气工程—电力系统及自动化]