A double-layer optimization method for distribution network expansion planning and solar-storage site selection and capacity determination

Abstract

The invention discloses a dual-layer optimization method for power distribution network expansion planning and light storage locating and sizing. The method comprises the steps of building an upper-layer optimization model for active power distribution network expansion planning: determining a target function and constraint conditions of the upper-layer model; building a lower-layer optimization model for light storage capacity configuration: determining a target function and constraint conditions of the lower-layer model; and solving the upper-layer model and the lower-layer model: executing an upper-layer model optimization method, a lower-layer model optimization method and a dual-layer optimization method. According to the method, the built dual-layer optimization models taking a distribution network enterprise and users as subjects and taking calculation of optimal economic cost as a target comprehensively analyze economic influence of light storage system access and power distribution network expansion planning on the distribution network enterprise and the users; a planning model taking annual cost expense as a target function can well assess the economy of a power distribution network; and the light storage system can be reasonably configured, so that the power purchase costs of the users are effectively reduced, the on-spot consumption of photovoltaic energy is increased, and the network loss of a power distribution system can be effectively reduced.

Description

technical field [0001] The invention relates to a distribution network optimization method. In particular, it involves a two-layer optimization method for distribution network expansion planning and solar storage site selection and capacity determination. Background technique [0002] Distributed power generation is designed and installed in order to meet the needs of some special users and support the economic operation of the existing distribution network. Get an enhanced form of power generation. Distributed power generation is generally located near the end users of the distribution network, which can provide benefits to users and power transmission and distribution systems. Distributed power supply is more economical and effective than centralized power supply in dealing with peak power load, and it is a beneficial supplement to centralized power supply. At the same time, a reasonable configuration of the energy storage system can effectively reduce photovoltaic outp...

AI Technical Summary

Problems solved by technology

[0008] (1) Establish the objective function of the upper model, aiming at solving distribution network planning and solar storage location problems for distribution network enterprises, the objective function considering the optimal total cost / benefit of distribution network enterprises is as follows:

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