Diagnostic Criterion of Turn-to-turn Overvoltage Test in Dry-type Air-core Reactor

被引：0
|
作者：
Guo S. [1 ]
Niu Z. [1 ]
Li H. [1 ]
Mao T. [2 ]
Ma J. [1 ]
Long K. [1 ]
机构：
[1] Electric Power Research Institute of State Grid Jibei Electric Power Company, Beijing
[2] State Grid Jibei Electric Power Company, Beijing
来源：
Gaodianya Jishu/High Voltage Engineering | 2018年 / 44卷 / 03期
关键词：
Attenuation coefficient; Dry-type air-core reactor; Quantitative criterion; Turn-to-turn insulation; Turn-to-turn overvoltage;
D O I：
10.13336/j.1003-6520.hve.20180301018
中图分类号：
学科分类号：
摘要：
Turn-to-turn insulation defects in dry-type air-core reactors are the main cause of equipment failure. Consequently, we proposed the diagnostic criteria based on oscillation frequency, attenuation coefficient, and standard deviation. For oscillation frequency, if the frequency deviation of the rated voltage and the test voltage is more than 2%, the reactor has a turn-to-turn insulation defect and is in a serious state. If the deviation is between 2% and 1%, the reactor may have turn-to-turn insulation defects and is in an attendant state. If the deviation does not exceed 1%, the reactor is in a normal state. For attenuation coefficient, two criteria such as 5% and 10% are established. For standard deviation, two criteria such as 10% and 30% are established. A standardized judgment flow can be used to assess the turn-to-turn insulation of dry-type air-core reactor, which provides a reference for the operation and maintenance of the reactor equipment. © 2018, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：804 / 811
页数：7
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