区域中压配电网的节能改造

Energy-saving Reconstruction of Regional Medium-voltage Distribution Network

由于配电网能效研究领域中缺乏系统化的区域配电网节能潜力评估,提出了基于熵权法的灰色关联分析法应用于中压配电网中。建立了简便、具有代表性的中压配电网指标体系,并通过基于熵权法的灰色关联分析筛选出区域中压配电网中损耗高、运行状态差的10 k V线路。运用改进的方法对该重损线路进行支路和单个变压器的损耗计算,计算出线损率并以线损率排序为依据评估节能潜力,从而实施节能改造。通过对某区域中压配电网的实例分析,证明该方法的合理性与实用性。

Due to the lack of systematic assessment on the energy-saving potential of a regional distribution network in the research field of distribution network＇s energy efficiency,the application of grey correlation analysis method to medium-voltage distribution network is proposed based on entropy weight method. First,a simple and representative medi-um-voltage distribution network index system is established,and a 10 k V line with high line loss rate and poor opera-tion state is selected from the regional network through grey correlation analysis based on entropy weight method. Then,the losses of branches and each transformer on this line are calculated using the improved method;afterwards,the ener-gy-saving potential is evaluated based on the sorting of line loss rate,which can help implement the energy-saving reconstruction. The rationality and practicability of the proposed method are verified by analyzing a regional medium-voltage distribution network as an example.