Alternating current and direct current hybrid power distribution network distributed coordination optimization method considering multi-objective optimization

Abstract

The invention relates to an AC/DC hybrid power distribution network distributed coordination optimization method considering multi-objective optimization. The method comprises the following steps: step 1, constructing an objective function and a constraint condition of an AC/DC hybrid power distribution network coordination optimization model; 2, reasonably partitioning the AC/DC hybrid power grid according to the connection position of the VSC to obtain a corresponding boundary decoupling equation and a constraint condition, and establishing a mathematical model of a sub-region by using an augmented Lagrangian method; 2, solving the interior of a region by adopting the AC/DC hybrid power distribution network coordinated optimization model established in the step 1, performing linearization processing on a non-convex problem by adopting a second-order cone relaxation technology and the like, thereby obtaining a convex optimization mathematical model based on the ADMM, solving and obtaining a new network power flow and the operation power of the FDS and the VSC, and finally obtaining the optimal power flow of the AC/DC hybrid power distribution network. And distributed coordinated optimization operation of the multi-target AC/DC hybrid power distribution network is realized. The operation cost of the power distribution network is reduced, and the flexibility and safety of the power distribution network are improved.

Description

technical field [0001] The invention belongs to the technical field of coordination optimization of AC-DC hybrid distribution network, and relates to a distributed coordination optimization method of AC-DC hybrid distribution network, especially a distributed coordination optimization method of AC-DC hybrid distribution network considering multi-objective optimization . Background technique [0002] In recent years, distributed generation (DG), especially photovoltaic systems and distributed energy storage systems, and flexible power loads such as electric vehicles have been continuously connected to the distribution network, which has brought many changes to the operation of the distribution network. The physical form of the distribution grid is undergoing rapid transformation. The AC-DC hybrid distribution network has the characteristics of efficient consumption of new energy and high proportion of access, and has become an important form of the future smart distribution ...

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Problems solved by technology

[0005] However, most studies usually only consider a single control method to solve the coordination optimization problem of AC-DC hybrid distribution network, and few optimization methods consider FDS together with other control methods

[0006] After searching, no published patent documents identical or similar to the present invention were found

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