試驗電源對變壓器低電壓短路阻抗試驗的影響
郭強(qiáng)
(國網(wǎng)樂山供電公司,四川 樂山 614000)
摘 要:不同類型的試驗電源會對低電壓短路阻抗試驗數(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原理,并利用不同種類的試驗電源對同一臺變壓器進(jìn)行低電壓短路阻抗測試,對比所測試驗數(shù)據(jù)的差異后分析可知,在短路阻抗現(xiàn)場試驗時應(yīng)使用電能質(zhì)量合格的站內(nèi)檢修電源,如現(xiàn)場不具備條件,宜使用大容量應(yīng)急發(fā)電車提供試驗電源;當(dāng)變壓器短路阻抗試驗數(shù)據(jù)出現(xiàn)異常時,應(yīng)及時使用更加可靠的試驗電源進(jìn)行復(fù)測,排除試驗電源的影響,提高試驗數(shù)據(jù)的準(zhǔn)確性。
關(guān)鍵詞:試驗電源;變壓器;繞組變形;短路阻抗試驗源
中圖分類號:TM406 文獻(xiàn)標(biāo)識碼:A 文章編號: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
參考文獻(xiàn)
[1] 王麗,劉勛. 一起電力變壓器繞組變形的綜合分析[J]. 變壓器,2011,48(6):68-70.
[2] 穆永保. 一起220 kV變壓器繞組變形缺陷的診斷與原因分析[J]. 變壓器,2014,51(11):62-65.
[3] 劉海峰,劉宏亮,唐亮. 變壓器繞組變形的診斷與分析[J]. 變壓器,2008,45(6):61-64.
[4] 陳巧勇,任紅,羅平,等. 電力變壓器繞組變形的綜合診斷法[J]. 高壓電器,2011,47(7):50-53.
[5] 程盛,陳三運(yùn),馬強(qiáng),等. 變壓器低電壓短路阻抗測試異常案例分析與討論[J]. 高壓電器,2009,45(2):108-111.
[6] 于洋,耿寧,陳勇強(qiáng). 一起220 kV變壓器繞組變形缺陷的診斷分析與解體驗證[J]. 高壓電器,2016,52(8):172-176.
[7] 鄒國平, 何文林, 董雪松, 等. 一起變壓器近區(qū)短路沖擊的診斷與分析[J]. 高壓電器,2013,49(12):95-98.
[8] 何文林,駱炫忠. 基于多狀態(tài)量的變壓器繞組變形判斷策略研究[J]. 變壓器,2009,46(2):34-37.
[9] 王楠,王偉,馬小光,等. 基于多融合技術(shù)的變壓器繞組變形測試與診斷方法[J]. 絕緣材料,2015,48(11):69-75.
[10] DL/T 1093—2008電力變壓器繞組變形的電抗法檢測判斷導(dǎo)則[S].