高电压技术
高電壓技術
고전압기술
HIGH VOLTAGE ENGINEERING
2011年
6期
1355-1361
,共7页
电容型设备%在线监测%介质损耗因素%故障预警%预测%受潮故障
電容型設備%在線鑑測%介質損耗因素%故障預警%預測%受潮故障
전용형설비%재선감측%개질손모인소%고장예경%예측%수조고장
capacitive equipment%on-line monitoring%dielectric dissipation factor%fault early warning%prediction%damp fault
电容型设备是重要的输变电设备,其可靠稳定运行是保障电力系统安全生产的重要因素。为此,以电容型设备常见的受潮故障作为研究内容,研究了其故障程度表征情况和预警方法。基于虚拟仪器技术,采用高速同步数字化测量技术,开发一套高精度电容型设备绝缘特性测试系统;提出基于真实设备本体的电容型设备受潮故障模型设计方案,对电流互感器人为设置受潮故障;应用绝缘特性测试系统测试电流互感器的受潮故障特性,获得水分质量浓度与介质损耗因素tanδ、泄漏电流、阻性电流及电容量的关系曲线,探索不同严重程度的绝缘受潮故障预警值。最后根据实验数据建立了tanδ对水分质量浓度的预测模型,得到了故障设备水分质量浓度的发展路线和速率,并通过实例分析验证了将tanδ作为特征量,绝缘油中水分质量浓度为阈值进行电容型设备故障预警的可行性。
電容型設備是重要的輸變電設備,其可靠穩定運行是保障電力繫統安全生產的重要因素。為此,以電容型設備常見的受潮故障作為研究內容,研究瞭其故障程度錶徵情況和預警方法。基于虛擬儀器技術,採用高速同步數字化測量技術,開髮一套高精度電容型設備絕緣特性測試繫統;提齣基于真實設備本體的電容型設備受潮故障模型設計方案,對電流互感器人為設置受潮故障;應用絕緣特性測試繫統測試電流互感器的受潮故障特性,穫得水分質量濃度與介質損耗因素tanδ、洩漏電流、阻性電流及電容量的關繫麯線,探索不同嚴重程度的絕緣受潮故障預警值。最後根據實驗數據建立瞭tanδ對水分質量濃度的預測模型,得到瞭故障設備水分質量濃度的髮展路線和速率,併通過實例分析驗證瞭將tanδ作為特徵量,絕緣油中水分質量濃度為閾值進行電容型設備故障預警的可行性。
전용형설비시중요적수변전설비,기가고은정운행시보장전력계통안전생산적중요인소。위차,이전용형설비상견적수조고장작위연구내용,연구료기고장정도표정정황화예경방법。기우허의의기기술,채용고속동보수자화측량기술,개발일투고정도전용형설비절연특성측시계통;제출기우진실설비본체적전용형설비수조고장모형설계방안,대전류호감기인위설치수조고장;응용절연특성측시계통측시전류호감기적수조고장특성,획득수분질량농도여개질손모인소tanδ、설루전류、조성전류급전용량적관계곡선,탐색불동엄중정도적절연수조고장예경치。최후근거실험수거건립료tanδ대수분질량농도적예측모형,득도료고장설비수분질량농도적발전로선화속솔,병통과실례분석험증료장tanδ작위특정량,절연유중수분질량농도위역치진행전용형설비고장예경적가행성。
Taking common damp faults of capacitive equipment as research contents,we studied its fault degree characterization and warning methods.With virtual instrument technique and high-speed synchronous digital measurement technology,we developed a set of test system for insulating properties of high-precision capacitance equipment,proposed a design scheme of capacitance equipment damp fault model based on real equipment,and set damp fault artificially for current transformer.Moreover,we applied the test system to test the damped insulating properties of the current transformer and obtain the micro water content of insulating oil and tanδ,discharge current,resistance of current,and capacitance relation curves,and explored the insulation damp fault early warning value.According to the experimental data,we established a prediction model,and obtained the micro water content development route and speed of fault equipment.The results prove the feasibility of fault early warning for capacitive equipment when taking tanδ as a characteristic parameter,micro water content of insulating oil as threshold value.
