Three-phase unbalanced intelligent power distribution network reconstruction method based on linear model

A technology for intelligent distribution network and network reconfiguration, applied in the direction of reducing asymmetry of multi-phase network, eliminating/reducing asymmetry of multi-phase network, AC network circuit, etc., can solve the problems of high computational complexity and low computational efficiency

Active Publication Date: 2018-05-29
SOUTHEAST UNIV
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Problems solved by technology

However, the calculation complexity based on the deterministic mathematical programming method is usually high, and the computational efficiency is relatively low, so it is necessary to adopt a corresponding simplified approximation method to improve the practicability of the mathematical programming method

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  • Three-phase unbalanced intelligent power distribution network reconstruction method based on linear model
  • Three-phase unbalanced intelligent power distribution network reconstruction method based on linear model
  • Three-phase unbalanced intelligent power distribution network reconstruction method based on linear model

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Embodiment Construction

[0073] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0074] Such as figure 1 As shown, a three-phase unbalanced intelligent distribution network network reconfiguration method based on a linear model includes the following steps:

[0075] Step 1: For the radial smart distribution network, based on the Distflow branch power flow model, the total line loss is modeled for the smart distribution network with distributed power generation with asymmetrical three-phase line parameters and unbalanced three-phase power, and the The voltage approximation is simplified.

[0076] (1) For the smart distribution network with radial operation, the Distflow branch power flow form of its optimization model is derived as follows.

[0077] For node j in the grid, there is

[0078]

[0079]

[0080] In the formula, is the ABC three-phase model; the set t(j) is the head-end node set of the branch with j as...

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Abstract

The invention discloses a three-phase unbalanced intelligent power distribution network reconstruction method based on a linear model. The method includes performing modeling and approximate analysison the three-phase unbalanced intelligent power distribution network by using a Distant flow branch flow model; establishing a network reconstruction mathematical model considering the problems that an intelligent power distribution network including distributed generation (DG) has the line parameters in three-phase asymmetry and unbalanced power; linearizing the established model by using an optimal isometric piecewise linear approximation method, so as to obtain a mixed integer linear model reconstructed by the network and solve the mixed integer linear model by using commercial mathematicalplanning software. According to the method, the defects that the circuit parameters are not symmetric and the power is unbalanced in the current intelligent power distribution network reconstructionoptimization process are overcome, meanwhile, the solving speed and efficiency of the network reconstruction model are improved, and a theoretical support is provided for economic and reliable operation of the intelligent power distribution network.

Description

technical field [0001] The invention relates to a network reconfiguration method for the operation of an intelligent distribution network, in particular to an economical reconfiguration method considering the unbalanced three-phase power of the distribution network and the asymmetry of line parameters. Background technique [0002] The smart distribution network is a complex network composed of substation busbars, section switches, tie switches, loads and distributed power sources and other equipment and components connected in a certain form. Distribution network reconfiguration is a process in which the distribution network achieves the established optimization goals under the conditions of safe operation and radial operation by reasonably changing the opening and closing states of the switches in the system. Distributed power generation, as a representative of clean energy power generation technology, has attracted increasing attention due to its high efficiency and low e...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/26
CPCH02J3/26H02J2203/20Y02E40/50
Inventor 吴在军成晟周力窦晓波顾伟
Owner SOUTHEAST UNIV
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