DC Insulation Parameter Characteristics of XLPE in the Course of Its Aging

作     者：WANGHong-xin CHENGShu-kang WENXi-shan YAOHong-yu CHENYun-ping 

作者机构：SchoolofElectricalEngineeringandAutomationHarbinInstiluleofTechnologyHarbin150001HeilongjiangChina SchoolofElectricalEngineeringWuhanUniversityWuhan430072HubeiChina 

出 版 物：《Wuhan University Journal of Natural Sciences》 (武汉大学学报（自然科学英文版）)

年 卷 期：2005年第10卷第2期

页      面：421-425页

核心收录：

学科分类：0808[工学-电气工程] 080803[工学-高电压与绝缘技术] 08[工学] 

基　　金：Supported by the National Natural Science Foundation of China (59677018) 

主　　题：XLPE aging insulation resistance DC component 

摘      要：This paper deals with the experimental study on the correlation betweeninsulation resistance (R) and direct current (DC) component (i_(de)) and corresponding aging degreeof insulation in the course of the aging within cross linked polyethylene (XLPE) insulation. Theaging tests were performed on a section of 10 kV transmission XLPE cable by means of water needlemethod, and _R was measured by DC voltage superimposed method, R and i_(de) were found to besignificantly dependent on the correspondingaging degree of insulation in the course of aging ofXLPE, and different kind of aging stage has different characteristics. Beside, there are generallysimilar regularity but different amplitude in the course of aging of XLPE insulation in differentelectrolyte, and the various electrochemical tree were found on the surface of aging XLPE cableimmersed in CuSO_4, solution. Therefore, according to the changing regularity of the DCcharacteristic parameters i. e. R and i_(de) within XLPE insulation judging the aging degree of XLPEinsulation will be an effective method.