Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

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试验电源对变压器低电压短路阻抗试验的影响

来源:电工电气发布时间:2017-12-19 13:19 浏览次数:3
试验电源对变压器低电压短路阻抗试验的影响
 
郭强
(国网乐山供电公司,四川 乐山 614000)
 
    摘 要:不同类型的试验电源会对低电压短路阻抗试验数据产生不同的影响。介绍了低电压短路阻抗法的试验原理,并利用不同种类的试验电源对同一台变压器进行低电压短路阻抗测试,对比所测试验数据的差异后分析可知,在短路阻抗现场试验时应使用电能质量合格的站内检修电源,如现场不具备条件,宜使用大容量应急发电车提供试验电源;当变压器短路阻抗试验数据出现异常时,应及时使用更加可靠的试验电源进行复测,排除试验电源的影响,提高试验数据的准确性。
    关键词:试验电源;变压器;绕组变形;短路阻抗试验源
    中图分类号:TM406     文献标识码:A     文章编号:1007-3175(2017)12-0056-03
 
Influence of Test Power Source on Low Voltage Short-Circuit Impedance Test of Transformer
 
GUO Qiang
(State Grid Leshan Power Supply Company, Leshan 614000, China)
 
    Abstract: Different type of test power source will have impacts on low voltage short-circuit test data. Introduction was made to the test principle of low voltage short-circuit impedance method. This paper used different kinds of test power sources to carry out low voltage shortcircuit impedance tests for the same transformer. The tested data differences were contrasted and the analysis showed that when the shortcircuit impedance field tests were carried out, the overhauling power source of eligible power quality in the station should be adopted. If the field didn’t meet the requirements, the high-capacity emergency dynamo van could provide the test power source. When the short-circuit impedance test data of the transformer were abnormal, the more reliable test power source should be carried out retest in time, to eliminate the impact of the test power source to improve the accuracy of the test data.
    Key words: test power source; transformer; winding deformation; short-circuit impedance test
 
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