Clustering method for identifying user-phase relationship of low-voltage single-phase user

Abstract

The invention discloses a clustering method for user-phase relationship identification of low-voltage single-phase users, which relates to the technical field of topology identification of low-voltagepower distribution networks and comprises the following steps: acquiring voltage data of all low-voltage users in a transformer area in a specified time period to form a high-dimensional voltage matrix; normalizing high-dimensional voltage matrix elements to be within the range of [0,1]; calculating a similarity index threshold; judging whether a clustering standard is met or not; when the clustering standard is met, the clustering being the same phase; when the clustering standard is not met, deleting all the user data meeting the standard from the original matrix, and forming a new high-dimensional matrix by residual data; returning to execute the step of calculating the similarity index threshold; and finally, after clustering into three types of results, verifying each of two types ofuser phases so as to identify the user-to-user relationship of all users. According to the invention, based on data mining, a metering automation system is used to carry out clustering analysis on user measurement data so as to realize effective identification of a single-phase low-voltage user phase relation.

Description

technical field [0001] The present invention relates to the technical field of low-voltage distribution network topology identification, in particular to a clustering method for identification of phase relationship between low-voltage single-phase users. Background technique [0002] Due to the backward development of my country's distribution network, especially the low-voltage distribution network compared with the power generation and transmission networks, the structural relationship of low-voltage users is complex and diverse, and the problem of three-phase imbalance is prominent, resulting in a series of problems such as increased line loss and low quality of power consumption by users. harm. In view of the above hazards, the power grid needs to carry out the treatment of the three-phase imbalance problem, but the premise of the work is that the household-phase relationship of the low-voltage single-phase users must be clarified. However, the current problem facing the...

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Problems solved by technology

[0004] At present, the control of three-phase imbalance currently adopts two methods: automatic adjustment and manual adjustment. Automatic adjustment requires the installation of hardware facilities, which has high investment costs and is difficult to promote on a large scale; manual adjustment must be based on household changes and household phase relationships, otherwise there will be strong However, the existing means can only distinguish the relationship between households and households, and there is no effective way to confirm the relationship between households and phases. Most areas still rely on repeated load switching to achieve precise adjustments. Therefore, for low-voltage single-phase users The cluster analysis of household relationship identification is very necessary

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