Optimization method for distribution transformer site selection and low-voltage net rack planning

Abstract

The invention discloses an optimization method for distribution transformer site selection and low-voltage net rack planning. The optimization method comprises the following steps that: taking a load moment theory as a basis to assist in deciding the optimal distribution point of a distribution transformer; through linear iterative computation, searching each-point load moment algebra and the point coordinate of a minimum value within a supply area range to serve as a basis for the planning distribution point of the distribution transformer; and from the structural characteristics of a low-voltage power distribution network, utilizing the related theory of a graph theory to enable the optimal layout of the low-voltage power distribution network to be equivalent to the search of a minimum spanning tree and a shortest path in the graph theory. The method has the advantages of being convenient in operation, small in workload and high in practicality, an effect of minimized initial cost and line loss optimization of zone area construction is achieved to a high degree, working efficiency is effectively improved, a technical support is provided for guaranteeing the production and operation of the rural power distribution network and electric energy quality, and therefore, the optimization method has a great auxiliary decision meaning for the construction of the low-voltage power distribution network.

Description

technical field [0001] The invention relates to the field of distribution networks, in particular to a method for site selection of distribution transformers and low-voltage grid planning optimization. Background technique [0002] At present, in the process of distribution network construction, the layout of transformers and low-voltage lines has a wide range of points and a huge amount of use. The amount of capital invested in the construction and renovation of the distribution network is huge. Billions. The rationality of the planning and design of the transformer layout and the selection of low-voltage outlets will directly affect the initial investment of the project and the low-voltage problems caused by commissioning. The number of projects every year is so huge. Basically, the designers rely on site surveys one by one and manual positioning. The design scheme is highly subjective. Different people may have different conclusions. The error is large. It is difficult...

AI Technical Summary

Problems solved by technology

[0015] ①The number of load points must be much greater than the number of intervals for distribution transformer outlets, so it is impossible for one load point to occupy one interval;

[0016] ②The actual direction of the low-voltage line is affected by the surrounding terrain, buildings, line corridors, etc., and it is difficult to go to the end in a straight line;

[0017] ③Each load point is directly supplied by the power point, which will inevitably cause a great consumption of wires

[0018] (2) The coordinate positioning in the traditional site selection method lacks the possibility of operation

According to the existing technology, coordinate positioning requires the establishment of a measurement control network and the use of more advanced surveying and mapping equipment, which is unbearable for a low-voltage distribution network with a short construction period and a large number of constructions

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