Low-voltage distribution network three-phase single-line diagram initial layout automatic generation method

Abstract

The invention discloses a low-voltage distribution network three-phase single-line diagram initial layout automatic generation method. According to the topological relation of single feeders of the low-voltage three-phase power distribution network and equivalent single-phase loads of load nodes, the sector layout of a, b and c according to 120 degrees is calculated, and finally a three-phase power distribution network single-feeder single-line diagram which is uniformly arranged in a plane is formed. According to the method, wiring of the low-voltage power distribution network wiring diagramcan be carried out on one plane, coordinates of all nodes are automatically calculated, line segments are drawn according to the connection relation between the nodes, line segment intersection can beavoided through selection of the coefficient l, and finally the low-voltage power distribution network split-phase wiring diagram which is uniform in distribution and free of intersection is formed.An excellent initial single-line diagram is provided for the next step of diagram optimization calculation, the method can also be directly used for the final diagram of the low-voltage power distribution network wiring diagram, rendering of various themes is performed on the single-line diagram based on intelligent electric meter measurement data, load flow calculation and other calculation values, and the effect of the quasi-real-time situation monitoring purpose of the low-voltage power distribution network is better.

Description

technical field [0001] The invention belongs to the field of situation awareness and visualization of smart grids, and relates to an automatic generation method for a single-line diagram of a three-phase branch line of a low-voltage distribution network suitable for situation analysis. Background technique [0002] The low-voltage distribution network in the public substation area is the lowest-level power grid that the power grid company serves for the majority of low-voltage power users; its power users can be divided into three-phase users and single-phase users; the low-voltage distribution network uses distribution transformers as the power supply, The main power supply mode is three-phase four-wire, taking into account the single-phase two-wire power supply mode; the main line is laid with three-phase four-wire, and a junction box or junction box is set in the middle to lead out three-phase four-wire branches, or lead out three-phase The incoming line of the four-phase...

AI Technical Summary

Problems solved by technology

[0005] The automatic generation of one-line diagrams mainly includes the rule method, the optimization mathematical model method, the force field model or the dynamic algorithm; among them, the rule method is fast in calculation and can avoid overlapping problems. However, it is a high-dimensional optimization mathematical problem that is difficult to solve; while the one-line diagram calculated based on the force field model or dynamic algorithm is more beautiful, and the calculation is fast, but it may appear Intersection and layout ball clustering

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