Method for selecting main substation capacity and optimal station address of transformer substation

Abstract

The present invention discloses a method for selecting main substation capacity and an optimal station address of a transformer substation and belongs to the technical field of distribution network planning in the power industry. According to the present invention, a method for selecting the station address of the transformer substation comprises: selecting the optimal station address of the transformer substation according to factors such as an area load condition, load distribution, a geographic position and the like; and a method for determining the substation capacity comprises: selecting and determining the main substation capacity of the transformer substation according to the load distribution and the future development condition by considering conditions such as investment cost and the like. According to the present invention, based on the actual situations, a load is predicted and according to the load prediction condition and the actual situations of environmental geographical factors and the like, a transformer substation layout principle is combined, factors such as initial investment cost, operation cost, maintenance cost and the like of a transformer substation planning scheme are comprehensively considered and related constraint conditions such as a capacity-load ratio and the like are considered so as to determine the optimal substation capacity and station address; and the method considers more comprehensive actual factors of a distribution network transformer substation locating and sizing plan, so that the planning scheme is closer to the actual situations, the method is more reasonable and practicality is higher.

Description

technical field [0001] The invention belongs to the technical field of distribution network planning in the electric power industry, and in particular relates to a method for selecting the main transformer capacity of a substation and an optimal station site. Background technique [0002] High-voltage distribution substations play an extremely important role in the power supply security and power supply quality of the entire power grid. To determine the location and capacity of high-voltage substations, it is necessary to consider not only the separate conditions of the load, but also the structure of the entire power grid. [0003] There have been many research results on optimizing the site and capacity of distribution substations at home and abroad. These studies are either based on the horizontal year candidate sites proposed by experts, or based on the assumption of average load distribution. Literature (1) divides the substation optimization problem into two sub-probl...

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Problems solved by technology

Based on the research in literature (1), literature (2) puts forward a more complete optimization model considering the impact of line investment, and uses the triangular continuous segmentation algorithm to solve the combined optimization problem of substation optimization planning, but the triangular continuous segmentation algorithm is in the solution The optimal solution may also be missed when the objective function is non-convex optimization problem

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