电机与控制学报
電機與控製學報
전궤여공제학보
ECTRIC MACHINES AND CONTROL
2015年
5期
21-29
,共9页
魏新劳%朱博%庞兵%陈庆国%王颂%李锐海
魏新勞%硃博%龐兵%陳慶國%王頌%李銳海
위신로%주박%방병%진경국%왕송%리예해
海底充油电缆%绝缘在线监测%护套绝缘%接地电流%电流传感器
海底充油電纜%絕緣在線鑑測%護套絕緣%接地電流%電流傳感器
해저충유전람%절연재선감측%호투절연%접지전류%전류전감기
submarine oil-filled cable%on-line insulation monitoring%jacket insulation%grounding cur-rent%current sensor
为了研究海南联网工程中所采用的海底充油电缆的绝缘状况,提出了基于双CT法的双端四电流传感器法对海底充油电缆护套绝缘进行在线监测,对该方法的原理进行了阐述,通过护套绝缘电流泄漏比和接地回路环流感应系数的变化作为判据来判断电缆护套的绝缘状况。给出了基于该方法的实施方案及监测系统,介绍了系统的组成,对电流传感器的结构进行了详细介绍。运用仿真软件构建电缆模型并对感应电流和电容电流进行仿真计算。现场实际监测结果与仿真计算结果表明监测系统能够真实的反应电缆护套绝缘状况。目前,监测系统已经在海南联网工程中运行,运行情况良好、数据稳定,为监测海底电缆护套绝缘状况提供了重要依据。
為瞭研究海南聯網工程中所採用的海底充油電纜的絕緣狀況,提齣瞭基于雙CT法的雙耑四電流傳感器法對海底充油電纜護套絕緣進行在線鑑測,對該方法的原理進行瞭闡述,通過護套絕緣電流洩漏比和接地迴路環流感應繫數的變化作為判據來判斷電纜護套的絕緣狀況。給齣瞭基于該方法的實施方案及鑑測繫統,介紹瞭繫統的組成,對電流傳感器的結構進行瞭詳細介紹。運用倣真軟件構建電纜模型併對感應電流和電容電流進行倣真計算。現場實際鑑測結果與倣真計算結果錶明鑑測繫統能夠真實的反應電纜護套絕緣狀況。目前,鑑測繫統已經在海南聯網工程中運行,運行情況良好、數據穩定,為鑑測海底電纜護套絕緣狀況提供瞭重要依據。
위료연구해남련망공정중소채용적해저충유전람적절연상황,제출료기우쌍CT법적쌍단사전류전감기법대해저충유전람호투절연진행재선감측,대해방법적원리진행료천술,통과호투절연전류설루비화접지회로배류감응계수적변화작위판거래판단전람호투적절연상황。급출료기우해방법적실시방안급감측계통,개소료계통적조성,대전류전감기적결구진행료상세개소。운용방진연건구건전람모형병대감응전류화전용전류진행방진계산。현장실제감측결과여방진계산결과표명감측계통능구진실적반응전람호투절연상황。목전,감측계통이경재해남련망공정중운행,운행정황량호、수거은정,위감측해저전람호투절연상황제공료중요의거。
Taking insulation condition of the submarine oil-filled cable which used in Hainan Interconnec-tion Project as the research object, a synchronous detection technique by using four current sensors to mo-nitor cable sheath insulation was put forward . The principle of the method was introduced and the ratio of jacket insulation leakage current and the inductance coefficient of grounding circuit current were proposed which can be used to judge the jacket insulation condition. The on-line monitoring system basic on the method was introduced, including the system composition and introduced the structure of current sensor in detail. Simulaiton software was used to build the cable model and simulation calculation on induced current and capacitive current were conducted. The simulation and monitoring results show that the monitoring sys-tem which can reflect condition of the cable insulation. The system was successfully put into operation in Hainan Interconnection project at present. The operation condition is good and test data is reliable, and provides an important basis on monitoring jacket insulation for submarine oil-filled cable.