电气自动化
電氣自動化
전기자동화
ELECTRICAL AUTOMATION
2015年
1期
73-74,107
,共3页
谭喜堂%吕佩佩%朱琴跃%成林坤
譚喜堂%呂珮珮%硃琴躍%成林坤
담희당%려패패%주금약%성림곤
单相双绕组变压器%匝间短路%故障诊断%故障发生时刻%故障程度
單相雙繞組變壓器%匝間短路%故障診斷%故障髮生時刻%故障程度
단상쌍요조변압기%잡간단로%고장진단%고장발생시각%고장정도
single-phase two-winding transformer%inter-turn short circuit%fault diagnosis%fault occurrence time%fault degree
针对现有方法无法对变压器匝间短路故障的发生时刻及其严重程度同时实现诊断，提出了基于电类特征信号提取的故障诊断方法。在对单相双绕组变压器匝间短路后其输出响应进行分析的基础上，对变压器匝间短路故障的产生进行了建模和仿真；通过提取变压器一、二次侧电流信号的时域故障特征对故障发生时刻进行了诊断；基于此再结合相应电流信号的频域故障特征，采用曲线拟合与数据库比对的方法对匝间短路故障程度进行了有效诊断。仿真和测试结果表明，进行诊断后的结果符合预期的目标。
針對現有方法無法對變壓器匝間短路故障的髮生時刻及其嚴重程度同時實現診斷，提齣瞭基于電類特徵信號提取的故障診斷方法。在對單相雙繞組變壓器匝間短路後其輸齣響應進行分析的基礎上，對變壓器匝間短路故障的產生進行瞭建模和倣真；通過提取變壓器一、二次側電流信號的時域故障特徵對故障髮生時刻進行瞭診斷；基于此再結閤相應電流信號的頻域故障特徵，採用麯線擬閤與數據庫比對的方法對匝間短路故障程度進行瞭有效診斷。倣真和測試結果錶明，進行診斷後的結果符閤預期的目標。
침대현유방법무법대변압기잡간단로고장적발생시각급기엄중정도동시실현진단，제출료기우전류특정신호제취적고장진단방법。재대단상쌍요조변압기잡간단로후기수출향응진행분석적기출상，대변압기잡간단로고장적산생진행료건모화방진；통과제취변압기일、이차측전류신호적시역고장특정대고장발생시각진행료진단；기우차재결합상응전류신호적빈역고장특정，채용곡선의합여수거고비대적방법대잡간단로고장정도진행료유효진단。방진화측시결과표명，진행진단후적결과부합예기적목표。
Considering that there is no existing method for diagnosis of both the occurrence time of fault and its degree of the inter-turn short circuit of the transformer,this paper proposes a fault diagnostic method based on electrical characteristic signals.On the basis of analyzing the output response after occurrence of inter-turn short circuit of the single-phase two-winding transformer,modeling and simulation is completed on the generation of inter-turn short circuit of the transformer.The fault occurrence moment is diagnosed by extracting time domain fault characteristics of the current signal at the primary and secondary sides of the transformer.Furthermore, the fault degree is diagnosed effectively in the method of curve fitting and database comparison under consideration of the frequency domain fault characters of corresponding current signal.Simulation and test results show that the result of this diagnostic method fulfills the expected goal.
