CAJ | 학술논문

为了对10 kV运行电缆绝缘状态进行简单、快速评估，提出一种基于去极化电流的诊断方法，对水树老化交联聚乙烯电缆绝缘状态进行评估，并对其诊断参数进行了研究。首先通过水树加速老化装置在电缆样本中生成明显的水树。然后采用虚拟仪器（ Labview ）配合Keithely皮安表与高压真空开关系统完成去极化电流控制采集平台的搭建。利用搭建的测试平台对不同长度和不同老化时间的电缆样本进行去极化电流测试，通过对去极化电流曲线的积分，提出了基于去极化电流放电量的电缆绝缘老化判别方法。结果表明：长电缆的去极化放电量远大于短电缆，老化电缆的放电量大于新电缆，且老化程度越严重，稳定后去极化电流值越大。说明该去极化电流法能准确有效判别电缆绝缘老化问题。
위료대10 kV운행전람절연상태진행간단、쾌속평고，제출일충기우거겁화전류적진단방법，대수수노화교련취을희전람절연상태진행평고，병대기진단삼수진행료연구。수선통과수수가속노화장치재전람양본중생성명현적수수。연후채용허의의기（ Labview ）배합Keithely피안표여고압진공개관계통완성거겁화전류공제채집평태적탑건。이용탑건적측시평태대불동장도화불동노화시간적전람양본진행거겁화전류측시，통과대거겁화전류곡선적적분，제출료기우거겁화전류방전량적전람절연노화판별방법。결과표명：장전람적거겁화방전량원대우단전람，노화전람적방전량대우신전람，차노화정도월엄중，은정후거겁화전류치월대。설명해거겁화전류법능준학유효판별전람절연노화문제。
In order to assess the 10kV power cable insulation condition simply and rapidly , this paper proposed a di-agnosis method based on the depolarization current .Insulation conditions of water tree aged XLPE cable were assessed using this method , and the diagnosis parameters of the method were discussed .Firstly, a water-needle method was employed to obtain water tree aged cables samples .Using the virtual instrument ( Labview ) , Keithely picoammeters and high-voltage vacuum switch system , a current test platform was constructed to collect the depolarization current . Samples of different length were subjected to perform depolarization current measurements , and diagnosis method based on depolarization discharge quantity was put forward by integrating the depolarization current measurement curve .The results show that depolarization discharge quantity of long cable is greater than that of short one , and the depolarization current values of samples tend to increase with aging time .The experiment indicates that depolarization current measurements can effectively assess the insulation condition of power cable .