绝缘材料
絕緣材料
절연재료
INSULATING MATERIALS
2014年
3期
85-88,93
,共5页
刘勇%汲胜昌%梁笑尘%何文林%孙翔%邱炜
劉勇%伋勝昌%樑笑塵%何文林%孫翔%邱煒
류용%급성창%량소진%하문림%손상%구위
绕组变形%扫频阻抗法%频率响应分析法%短路阻抗法
繞組變形%掃頻阻抗法%頻率響應分析法%短路阻抗法
요조변형%소빈조항법%빈솔향응분석법%단로조항법
winding deformation%sweep frequency impedance method%frequency response analysis meth-od%short circuit impedance method
为了有效减少变压器绕组变形诊断的误判率,提出了一种新型变压器绕组变形检测方法--扫频阻抗法,以该法为理论基础建立了一套变压器绕组变形测试系统,并对一台三相变压器进行了测试。结果表明:扫频阻抗曲线50 Hz处的阻抗值与短路阻抗法的测试值呈现较高的一致性;在频率为500 Hz~1 MHz时,扫频阻抗法具有频率响应分析法的测试特点,能够有效描述绕组等效电路模型极值点的变化;在整个频段中,扫频阻抗法都表现出很高的测试灵敏度和重复性,因此该方法是一种可行且有效的变压器绕组变形检测方法。
為瞭有效減少變壓器繞組變形診斷的誤判率,提齣瞭一種新型變壓器繞組變形檢測方法--掃頻阻抗法,以該法為理論基礎建立瞭一套變壓器繞組變形測試繫統,併對一檯三相變壓器進行瞭測試。結果錶明:掃頻阻抗麯線50 Hz處的阻抗值與短路阻抗法的測試值呈現較高的一緻性;在頻率為500 Hz~1 MHz時,掃頻阻抗法具有頻率響應分析法的測試特點,能夠有效描述繞組等效電路模型極值點的變化;在整箇頻段中,掃頻阻抗法都錶現齣很高的測試靈敏度和重複性,因此該方法是一種可行且有效的變壓器繞組變形檢測方法。
위료유효감소변압기요조변형진단적오판솔,제출료일충신형변압기요조변형검측방법--소빈조항법,이해법위이론기출건립료일투변압기요조변형측시계통,병대일태삼상변압기진행료측시。결과표명:소빈조항곡선50 Hz처적조항치여단로조항법적측시치정현교고적일치성;재빈솔위500 Hz~1 MHz시,소빈조항법구유빈솔향응분석법적측시특점,능구유효묘술요조등효전로모형겁치점적변화;재정개빈단중,소빈조항법도표현출흔고적측시령민도화중복성,인차해방법시일충가행차유효적변압기요조변형검측방법。
To decrease the misjudge rate of diagnosing the transformer winding deformation, a novel meth-od to detect transformer winding deformation was proposed, which is defined as sweep frequency imped-ance(SFI) method. A measurement system was set up to test a three-phase transformer based on SFI meth-od. The results show that the impedance value when the frequency is 50Hz in SFI curve is approximate-ly equal to the test value of short circuit impedance(SCI) method. When the frequency is 500 Hz~1 MHz, the SFI method has the characteristics of frequency response analysis method, which can describe the changes of extreme point of transformer equivalent circuit model and show super sensitivity and repeat-ability. Therefore, SFI method is a feasible and effective method to detect the winding deformation of transformer.