空心电力电抗器绝缘故障在线监测

Online Monitoring for Insulation Fault of Air-core Power Reactor

在对干式空心电抗器匝间绝缘在线监测技术进行研究的基础上,提出了检测损耗因数作为干式空心电抗器匝间绝缘故障在线监测的方法,探究了正常情况及匝间短路时空心电力电抗器电气参数和损耗因数的计算方法。以10 kV级串、并联空心电力电抗器为研究对象,对两台电力电抗器的不同位置匝间短路故障下各种电气参数及变化率进行了计算。结果表明,在不同温度下,通过监测损耗因数的变化,能准确地识别电力电抗器的绝缘故障。

In this paper,the loss factor detection as online monitoring method for inter-turn insulation fault of dry air core reactor is proposed on the basis of study of online monitoring technology for inter-turn insulation of dry-type air-core reactor.The calculation method of the electrical parameters and loss factor of the air core power reactor under normal circumstances and in the case of failure respectively is explored.The 10 kV series and parallel air-core reactors as taken as study object,and various electrical parameters and rate of change of two air-core reactors at different positions of two sets of power reactors in case of inter-turn short circuit are calculated.It is shown by the result that the insulation fault of the power reactor can be identified accurately by way of monitoring loss factor variation at different temperatures.