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A new approach to on-line insulation monitoring of 10kV electric power cables
Author(s): 
Pages: 32-35
Year: Issue:  22
Journal: RELAY

Keyword:  绝缘在线监测模型参数识别最小二乘估计EMPT仿真;
Abstract: 在简述现有的电力电缆绝缘监测方法的基础上,提出了一种基于模型参数识别的电力电缆绝缘在线监测的新方法,对10 kV电力电缆每条线路的每一相分别建立数学模型,基于模型参数识别方法建立以线路参数为未知量的微分方程,利用实时采集到的电压、电流求解最小二乘意义下的模型参数估计值,依据得到的电缆线路对地绝缘电阻值,从而判断电缆的绝缘水平.经EMTP仿真结果验证,该方法正确、可靠,并且可以和馈线保护合为一体,满足自动化的要求.
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