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

An AC-DC hybrid, multi-objective optimization technology, applied in the field of distributed coordination optimization of AC-DC hybrid distribution network considering multi-objective optimization, can solve the problems of undiscovered patent literature, coordination and optimization of a single AC-DC hybrid distribution network, etc. Achieve the effect of improving flexibility and reliability, solving grid flow and voltage out-of-limit problems, increasing economy and safety

Pending Publication Date: 2022-04-15
HEBEI UNIV OF TECH
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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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  • Alternating current and direct current hybrid power distribution network distributed coordination optimization method considering multi-objective optimization
  • Alternating current and direct current hybrid power distribution network distributed coordination optimization method considering multi-objective optimization
  • Alternating current and direct current hybrid power distribution network distributed coordination optimization method considering multi-objective optimization

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Embodiment Construction

[0026] Embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings:

[0027] A distributed coordination optimization method for AC / DC hybrid distribution network considering multi-objective optimization, comprising the following steps:

[0028] Step 1: Considering various control methods of FDS, VSC, OLTC and photovoltaics, construct the objective function and constraints of the coordination optimization model of the AC-DC hybrid distribution network;

[0029] Step 2: According to the connection position of the VSC, divide the AC-DC hybrid grid reasonably, obtain the corresponding boundary decoupling equations and constraints, and use the augmented Lagrangian method to establish the mathematical model of the sub-region; The established AC-DC hybrid distribution network coordination optimization model is solved, but the model is a non-convex problem, which cannot be solved directly by ADMM. It needs to use second-orde...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J4/00H02J5/00
Inventor 王笑雪顾梨婷杨文泉
Owner HEBEI UNIV OF TECH
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