試驗(yàn)電源對(duì)變壓器低電壓短路阻抗試驗(yàn)的影響
郭強(qiáng)
(國(guó)網(wǎng)樂(lè)山供電公司,四川 樂(lè)山 614000)
摘 要:不同類型的試驗(yàn)電源會(huì)對(duì)低電壓短路阻抗試驗(yàn)數(shù)據(jù)產(chǎn)生不同的影響。介紹了低電壓短路阻抗法的試驗(yàn)原理,并利用不同種類的試驗(yàn)電源對(duì)同一臺(tái)變壓器進(jìn)行低電壓短路阻抗測(cè)試,對(duì)比所測(cè)試驗(yàn)數(shù)據(jù)的差異后分析可知,在短路阻抗現(xiàn)場(chǎng)試驗(yàn)時(shí)應(yīng)使用電能質(zhì)量合格的站內(nèi)檢修電源,如現(xiàn)場(chǎng)不具備條件,宜使用大容量應(yīng)急發(fā)電車提供試驗(yàn)電源;當(dāng)變壓器短路阻抗試驗(yàn)數(shù)據(jù)出現(xiàn)異常時(shí),應(yīng)及時(shí)使用更加可靠的試驗(yàn)電源進(jìn)行復(fù)測(cè),排除試驗(yàn)電源的影響,提高試驗(yàn)數(shù)據(jù)的準(zhǔn)確性。
關(guān)鍵詞:試驗(yàn)電源;變壓器;繞組變形;短路阻抗試驗(yàn)源
中圖分類號(hào):TM406 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):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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