A Method for Topology Identification of Low-voltage Station Area Based on Mixed Integer Programming

Abstract

The invention relates to a low-voltage station area topology identification method based on mixed integer programming. Firstly, combined with the data of the user electricity information collection system and the basic file data of the marketing system, the line loss is highly negatively correlated, and there is obviously an abnormal station area where the household change belongs. Then, binary variables are introduced into the abnormal station area to accurately represent the subordination relationship of the station area, and the mixed integer model of household change checking in the station area is constructed with the minimum square sum of line loss as the optimization goal, and the model is solved by using the branch and bound method; then the integer is used The segmentation method obtains the topological relationship of the station area with the highest priority and the highest probability of decreasing step by step; finally, the credibility evaluation index is established to evaluate the reliability of the abnormal users belonging to the station area that are checked and corrected. The invention greatly reduces the dependence of the topology identification method on the sample data, thereby obtaining the correct subordination relationship of household substations in the station area, and can accurately identify when there are many abnormal household substations.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a low-voltage station area topology identification method based on mixed integer programming. Background technique [0002] Compared with the level of intelligent construction of power transmission and medium-voltage distribution networks, the level of automation and intelligent construction of low-voltage distribution networks is backward. It is the weakest link in the intelligent construction of power grids, and lacks intelligent means for overall effective and precise management. The low-voltage distribution network is a terminal power supply network directly oriented to users, and it is an important link in creating a good power business environment. The accurate and reliable electrical topology relationship in the station area is to ensure stable and reliable operation of the low-voltage distribution network, rapid repair of faults, and line loss in the station area. T...

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Problems solved by technology

Among them, the method that requires the connection relationship of grid components and switch status information is of reference significance for newly added power grids, but for existing power grids, frequent switching of switches is impractical and greatly affects the residents' experience of using electricity; The sample size is limited, and it is impossible to effectively use machine learning, linear regression and other algorithms for analysis and calculation; the actual operation of a small number of station areas is difficult to meet the goal of optimal line loss, and the optimal solution of the model obtained by using only traditional planning algorithms sometimes does not conform to reality Area Topology

Therefore, it has been difficult to obtain an effective solution for the topological research and judgment of the stock low-pressure station area with few samples.

[0004] Therefore, there are certain difficulties in the actual engineering application of the traditional station topology research and judgment method

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