仪器仪表学报
儀器儀錶學報
의기의표학보
CHINESE JOURNAL OF SCIENTIFIC INSTRUMENT
2014年
8期
1831-1836
,共6页
潘洋%石雷兵%糜坚平%周力任%朱力%林艳
潘洋%石雷兵%糜堅平%週力任%硃力%林豔
반양%석뢰병%미견평%주력임%주력%림염
绝缘油介电强度测试仪%矢量输出%有限元分析%双电容分压器%电压互感器
絕緣油介電彊度測試儀%矢量輸齣%有限元分析%雙電容分壓器%電壓互感器
절연유개전강도측시의%시량수출%유한원분석%쌍전용분압기%전압호감기
insulation oil tester%vector quantity output%finite element analysis%double capacitance divider%voltage transformer
对绝缘油耐电压能力的考核通常采用绝缘油介电强度测量仪进行测试。采用普通高压分压器对绝缘油介电强度测试仪进行校准会出现2个问题:首先测试仪的带负载能力较弱,当分压器的输入阻抗小于测试仪的带载能力时,输出电压就会发生跌落;其次校准需要模拟测试时仪器的实际使用状态,校准装置需要具有与装有绝缘油油杯相同的阻抗。本文采用有限元分别对不同结构的圆盘电极、球形电极以及球盖形油杯电极进行建模计算,得到了不同油杯的电容量大小,同时用高精度LCR电桥对不同结构电极的电容量进行测量,据此设计了中间接地的双电容分压器的矢量信号测量装置,试验结果表明该校验装置可以有效匹配绝缘油介电强度测试仪的油杯阻抗,并能满足了对于测试仪矢量输出量值的准确溯源。研究了用全绝缘电压互感器对此标准装置进行校准,通过和中国国家高电压计量站的比对证明了用互感器串联加法校准的有效性。
對絕緣油耐電壓能力的攷覈通常採用絕緣油介電彊度測量儀進行測試。採用普通高壓分壓器對絕緣油介電彊度測試儀進行校準會齣現2箇問題:首先測試儀的帶負載能力較弱,噹分壓器的輸入阻抗小于測試儀的帶載能力時,輸齣電壓就會髮生跌落;其次校準需要模擬測試時儀器的實際使用狀態,校準裝置需要具有與裝有絕緣油油杯相同的阻抗。本文採用有限元分彆對不同結構的圓盤電極、毬形電極以及毬蓋形油杯電極進行建模計算,得到瞭不同油杯的電容量大小,同時用高精度LCR電橋對不同結構電極的電容量進行測量,據此設計瞭中間接地的雙電容分壓器的矢量信號測量裝置,試驗結果錶明該校驗裝置可以有效匹配絕緣油介電彊度測試儀的油杯阻抗,併能滿足瞭對于測試儀矢量輸齣量值的準確溯源。研究瞭用全絕緣電壓互感器對此標準裝置進行校準,通過和中國國傢高電壓計量站的比對證明瞭用互感器串聯加法校準的有效性。
대절연유내전압능력적고핵통상채용절연유개전강도측량의진행측시。채용보통고압분압기대절연유개전강도측시의진행교준회출현2개문제:수선측시의적대부재능력교약,당분압기적수입조항소우측시의적대재능력시,수출전압취회발생질락;기차교준수요모의측시시의기적실제사용상태,교준장치수요구유여장유절연유유배상동적조항。본문채용유한원분별대불동결구적원반전겁、구형전겁이급구개형유배전겁진행건모계산,득도료불동유배적전용량대소,동시용고정도LCR전교대불동결구전겁적전용량진행측량,거차설계료중간접지적쌍전용분압기적시량신호측량장치,시험결과표명해교험장치가이유효필배절연유개전강도측시의적유배조항,병능만족료대우측시의시량수출량치적준학소원。연구료용전절연전압호감기대차표준장치진행교준,통과화중국국가고전압계량참적비대증명료용호감기천련가법교준적유효성。
Oil tester is wildly used in the high voltage withstands capability of insulation oil testing.There will be two problems in calibrating such device using high voltage divider.First,the output voltage of oil tester will drop down due to its poor loading ability;second,the calibra-tion process should carried out in tester’s actual working condition.When the oil cup is taken out from the oil vessel,the calibration equip-ment should simulate the effect of oil cup.It is recommended that the calibration apparatus have the same impedance with insulation oil vessel. This paper built models for different-structure oil cup including circle plane electrode,sphere electrode and semispherical electrode.The simu-lation result using finite element analysis method and calculated the capacitance values of different oil vessel structure.Besides,high-precision LCR electrical bridge was used to measure capacitances of different electrode structure.Based on the simulation and measurement result,a middle-grounded double capacitance divider vector signal measurement standard was designed.The experiment results indicated that the de-signed calibration apparatus could effectively match the impedance of the oil cup and satisfied the traceability of vector quantity output value of the insulation oil tester with adequate accuracy.Further research on calibration this standard equipment was also discussed,the comparison re-sult to the China high voltage center show the conformity of using voltage transformer with serial adding method.