高电压技术
高電壓技術
고전압기술
HIGH VOLTAGE ENGINEERING
2009年
11期
2693-2697
,共5页
单绕组变压器模型%电气定位%变压器%局部放电%电流传输函数%距离函数法%多导体传输线模型
單繞組變壓器模型%電氣定位%變壓器%跼部放電%電流傳輸函數%距離函數法%多導體傳輸線模型
단요조변압기모형%전기정위%변압기%국부방전%전류전수함수%거리함수법%다도체전수선모형
single-winding transformer model%electrical location%transformers%partial discharge%current transfer function%distance function method%multi-conductor transmission wire model
为了实现变压器故障的准确、快速检测,建立了变压器连续式单绕组模型,该绕组的多导体传输线模型由180根导线构成,基于每匝线圈绕组首末端的连续性条件,以绕组高压首端从其套管末屏的接地线提取电流,绕组末端从其接地线上提取电流为边界条件.以此模型理论分析了绕组不同位置与首末端的电流传输函数,基于对不同饼的分段电流传输函数比曲线具有较大差异现象的考虑,提出并采用距离函数分析法实现对变压器局部放电的定位;将理论分析结果与一组180匝的变压器连续式单绕组实物的测试结果进行了对比分析,测试结果证明了所建立的变压器绕组多导体传输线模型和距离函数法在反映放电脉冲沿变压器绕组的实际传播特性和局部放电定位的有效性.
為瞭實現變壓器故障的準確、快速檢測,建立瞭變壓器連續式單繞組模型,該繞組的多導體傳輸線模型由180根導線構成,基于每匝線圈繞組首末耑的連續性條件,以繞組高壓首耑從其套管末屏的接地線提取電流,繞組末耑從其接地線上提取電流為邊界條件.以此模型理論分析瞭繞組不同位置與首末耑的電流傳輸函數,基于對不同餅的分段電流傳輸函數比麯線具有較大差異現象的攷慮,提齣併採用距離函數分析法實現對變壓器跼部放電的定位;將理論分析結果與一組180匝的變壓器連續式單繞組實物的測試結果進行瞭對比分析,測試結果證明瞭所建立的變壓器繞組多導體傳輸線模型和距離函數法在反映放電脈遲沿變壓器繞組的實際傳播特性和跼部放電定位的有效性.
위료실현변압기고장적준학、쾌속검측,건립료변압기련속식단요조모형,해요조적다도체전수선모형유180근도선구성,기우매잡선권요조수말단적련속성조건,이요조고압수단종기투관말병적접지선제취전류,요조말단종기접지선상제취전류위변계조건.이차모형이론분석료요조불동위치여수말단적전류전수함수,기우대불동병적분단전류전수함수비곡선구유교대차이현상적고필,제출병채용거리함수분석법실현대변압기국부방전적정위;장이론분석결과여일조180잡적변압기련속식단요조실물적측시결과진행료대비분석,측시결과증명료소건립적변압기요조다도체전수선모형화거리함수법재반영방전맥충연변압기요조적실제전파특성화국부방전정위적유효성.
In order to detect transformer fault accurately and quickly,a single-winding transformer model is established.The multi-conductor transmission wire model consists of the 180-turn wires,takes the winding continuity of the first-end of each turn as boundary conditions,in which the extraction current of the high-voltage winding is the extraction current of the end of casing form,and the extraction current of the winding end is the extracted current of the grounding line.With this model.the current transfer functions of the different windings from the first position to the end position are discussed.Based on the consideration of the great difference of the current transfer function between the different discharge locations,the position of the partial discharge of transformer is realized using the distance function method.The current transfer functions of a 180-turn single-winding transformer are measured.The theoretical and measured results are comparatively analyzed.The comparisons of the theoretical and experimental measured results of current transfer functions show that the method is effective.
