Expansion planning comprehensive optimization method of power distribution network with distributed power supply

Abstract

The invention provides an expansion planning comprehensive optimization method of a power distribution network with a distributed power supply. The expansion planning comprehensive optimization method includes the following steps that a multi-objective optimization function based on life-cycle cost is built; constraint conditions are determined; expansion planning comprehensive optimization of the power distribution network is performed. According to the expansion planning comprehensive optimization method of the power distribution network with the distributed power supply, the distributed power supply is taken as an optimizable factor, the minimum expansion grid cost serves as a target function, and the comprehensive optimization planning method of a substation, the distributed power supply and a feeder network under multiple constraint conditions is provided. Through solving, the optimal scheme of the position and the volume of a substation to be built in a planning area, the structure of the feeder network and the optimization configuration of the distributed power supply is obtained.

Description

technical field [0001] The invention belongs to the technical field of distribution network planning, and in particular relates to a comprehensive optimization method for distribution network expansion planning including distributed power sources. Background technique [0002] The main task of traditional distribution network planning is to determine the optimal system construction plan according to the spatial load prediction results in the network during the planning period and the basic conditions of the existing network, that is, under the premise of satisfying load growth and safe and reliable power supply, make The construction and operation costs of distribution network upgrading and transformation are minimal. When the capacity of the power distribution system cannot meet the increasing demand of the load in the area under its jurisdiction or some users have higher requirements for the reliability of power supply, it is necessary to increase the capacity of the syste...

AI Technical Summary

Problems solved by technology

[0005] Since distributed power can balance part of the load on site, and the type, capacity, installation location and investment time of distributed power are unpredictable, with the massive access of distributed power, it will lead to distribution network supply load (total, partition and sub-voltage level) prediction is more difficult, which is not conducive to the preparation of substation layout and line planning schemes for distribution network planning, and increases the uncertainty of distribution network planning

[0006] (2) It may lead to local adjustment of the distribution grid structure

[0008] (3) Have a certain impact on distribution network equipment and automation

[0010] (4) Have a certain impact on the investment benefits of the distribution network

Local consumption of distributed power will lead to a reduction in electricity sales in the distribution network

All of the above factors will lead to a decline in the return on investment of grid assets

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