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首页> 外文会议>DRPT 2008;International Conference on Electric Utility Deregulation and Restructuring and Power Technologies >Study of Auto-reclosure Strategy for 110kV Overhead-underground System in Kunming Power Grid
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Study of Auto-reclosure Strategy for 110kV Overhead-underground System in Kunming Power Grid

机译：昆明电网110kV架空地下系统自动重合闸策略研究

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In recent years, the proportion of under-ground cables in power gird has increased. More and more overhead -underground hybrid lines have come out. It is necessary to do further research on the problem that whether auto-reclosure should be put into operation on overhead-underground hybrid lines. In this paper, the phase matrices of overhead underground hybrid lines are derived at first, then the capacitive effect is analyzed and voltage transfer coefficient of hybrid lines is calculated. Taking one typical hybrid line as example in Kunming power grid, detailed models of it was built up in PSCAD/EMTDC. A large number of simulations for various reclosure angle were performed. Factors affecting the over-voltage caused by auto-reclosure are analyzed. And the mid-time method for judging the fault region is presented. The theory reference that whether reclosure should be put into operation on 110kV overhead-underground hybrid lines of Kunming power grid is provided.
机译：近年来，地下电缆在电网中的比例有所增加。越来越多的架空地下混合线路出现了。有必要对架空地下混合线路是否应进行自动重合闸的问题做进一步的研究。本文首先推导了架空地下混合线路的相位矩阵，然后分析了电容效应，计算了混合线路的电压传递系数。以昆明电网中的一条典型混合线路为例，在PSCAD / EMTDC中建立了详细的模型。对各种重合角度进行了大量的模拟。分析了由自动重合闸引起的过电压影响因素。提出了一种判断故障区域的中点方法。该理论为昆明电网110kV架空地下混合线路是否应重合闸提供了理论依据。

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