Low-voltage topology identification and automatic generation method

Abstract

The invention provides a low-voltage topology identification and automatic generation method. The method comprises the following steps: collecting data through a measurement system, forming the big data of a low-voltage power distribution network, and finally forming a multi-source heterogeneous database; performing data cleaning on the historical data, carding events based on data variation, and generating a node sensitivity relation database between nodes; dividing nodes into a considerable node list and an unconsiderable node list, vectorizing the nodes according to node types, forming a random walk list based on real-time electrical quantity weights in combination with a node sensitivity relation database matrix and real-time power data, and forming a low-voltage power distribution network topological structure; and on the basis of topology, according to the electrical distance between the nodes and the design parameters of the low-voltage power distribution network, combining a dynamic planning method, and finallyautomatically generating the network architecture of the power distribution network. Topology identification and automatic generation are dynamically realized, and the method has the advantages of easy engineering practice, high realizability and manpower saving.

Description

technical field [0001] The present application relates to the technical field of low-voltage topology identification, in particular, to a low-voltage topology identification and automatic generation method. Background technique [0002] At present, three methods are used to identify the topological relationship of the low-voltage distribution network in the station area: 1) Manual line inspection method: it is to manually check the line to describe the power supply path from the distribution transformer to the user through the feeder cabinet and the distribution box. Based on this synthesis, the power supply topology is drawn; 2) Switch-on method: by switching off the low-voltage outgoing line of the distribution network transformer, check whether the power is lost on the user side. If the power fails, it means that it does not belong to the power supply type of the transformer outlet, and so on; 3) Automatic identification based on the signal injection method: the basic met...

AI Technical Summary

Problems solved by technology

The above three methods are currently the main methods for low-voltage power supply topology identification in the station area, but there are many problems: 1) The workload is heavy. Whether it is manual line inspection, switch method, or injection signal method, personnel are required to work on site. It is very cumbersome and inefficient, and the signal injection method needs to add additional equipment, which increases the cost; the switching method works extensively, and it is not easy to adopt if it is not necessary; It is possible to solve such problems by re-patching the line and re-installing the identification signal device

However, in the process of application, this kind of statistical algorithm will cause misestimation of the circuit model to a certain extent, and generate redundant information such as virtual nodes and virtual branches. Therefore, there is still a lot of room for improvement in this kind of algorithm.

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