等溫松弛電流法在XLPE電纜老化狀態評估中的應用
林敏1，張子陽1，李淑琦2，吳建東2，尹毅2
(1 江蘇省電力公司，江蘇 南京 210024；
2 上海交通大學 電氣工程系，上海 200240)
摘 要： 設計了一種新型的等溫松弛電流測試系統，測試電路中考慮到微電流測試的抗干擾問題，基于該套系統分別研究了未老化、人工加速老化和實際運行的XLPE 絕緣電纜的等溫松弛電流，研究表明采用等溫松弛電流法不僅能夠有效評估實驗室電纜的老化程度，同時能夠有效評估現場運行電纜。
關鍵詞： 等溫松弛電流法；絕緣電纜；極化；退極化；電纜老化
中圖分類號：TM247+.1 文獻標識碼：A 文章編號：1007-3175(2014)09-0046-04
Application of Constant Temperature Relaxation Current Method in XLPE Insulated Power Cable Ageing State Evaluation
LIN Min1, ZHANG Zi-yang1, LI Shu-qi2, WU Jian-dong2, YIN Yi2
（1 Jiangsu Electric Power Company, Nanjing 210024, China;
2 Department of Electrical Engineering, Shanghai Jiaotong University, Shanghai 200240, China）
Abstract: This paper designed a new type of constant temperature relaxation current test system, which considered the anti-interference problem of micro-current test in the testing circuit. On the basis of this system, this paper studied the non-ageing, manual speedup ageing and constant temperature relaxation current of actually running cross linked polyethylene (XLPE) insulated power cable. Research shows that adopting the constant temperature relaxation current method could not only evaluate the ageing degree of cable in lab effectively, but also evaluate the site running cable.
Key words: constant temperature relaxation current method; insulated power cable; polarization; depolarization; cable ageing
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