基于TOPSIS-RSR方法的水环境下交流配网XLPE电缆绝缘状态评估  

Insulation Condition Assessment of XLPE Cable in AC Distribution Network Under Water Environment Based on TOPSIS-RSR Method

作　　者：柳怡晨 于竞哲 陈向荣 陆晓东 LIU Yichen;YU Jingzhe;CHEN Xiangrong;LU Xiaodong(Zhejiang Provincial Key Laboratory of Electrical Machine Systems,College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China;State Grid Shaoxing Power Supply Company,Zhejiang Shaoxing 312000,China;Electric Power Research,State Grid Jibei Electric power Co.,Ltd.,Beijing 100045,China)

机构地区：[1]浙江大学电气工程学院浙江省电机系统智能控制与变流技术重点实验室,杭州310027 [2]国网绍兴供电公司,浙江绍兴312000 [3]国网冀北电力有限公司电力科学研究院,北京100045

出　　处：《高压电器》2021年第7期105-111,118,共8页High Voltage Apparatus

基　　金：“浙江大学”百人计划(自然科学A类);浙江省自然科学基金项目(LY18E070003)。

摘　　要：我国南部地区特别是沿海区域的大量交流配网电缆长期在水环境中运行,准确评估水环境下电缆的绝缘性能对于电网的安全稳定运行具有重要意义。选取在不同环境条件和负荷条件下运行的80组10 kV交流配网XLPE电缆,利用理想解—秩和比综合评估方法对所选电缆进行绝缘状态评估,同时对所选电缆进行超低频介质损耗和振荡波局部放电实验,重点研究水分和温度对电缆绝缘性能的影响。超低频介损和振荡波局放实验结果证明了电缆绝缘状况评估结果的准确性。因此,在对多根电缆进行绝缘检测前,可通过理想解-秩和比综合评估方法对待测电缆进行绝缘状况评估,提高交流配网电缆的维护效率。A large number of AC distribution cable in southern China,especially in coastal areas,operate in water environment for a long time.Accurate assessment of the insulation performance of the cable under water environment is of great significance to the safe and stable operation of power grid.Eighty groups of 10 kV AC distribution network XLPE cables operating under different environmental conditions and loads are selected.The insulation condition of the selected cables are assessed by the comprehensive evaluation method of ideal solution-rank sum ratio and,at the same time,ultra-low frequency dielectric loss and oscillating wave partial discharge experiments are carried out on the selected cables and the effects of moisture and temperature on the insulation performance of the cables are studied in particular.The accuracy of the insulation condition assessment result of the cables is proved by the experimental results of ultra-low frequency dielectric loss and oscillating wave partial discharge.Therefore,before the insulation detection of multiple pieces of cables,the insulation condition of the cables to be tested can be evaluated by the comprehensive evaluation method of ideal solution-rank sum ratio so as to improve the maintenance efficiency of AC distribution network cables.

关 键 词：交联聚乙烯电缆 水环境 理想解—秩和比法 超低频介损 振荡波局放 

分 类 号：TM75[电气工程—电力系统及自动化]