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Dynamic reconstruction loss reduction method for power distribution network based on second-order cone relaxation method

A technology of distribution network reconfiguration and dynamic reconfiguration, which is applied to AC networks of the same frequency with different sources, electrical digital data processing, special data processing applications, etc.

Inactive Publication Date: 2019-06-07
STATE GRID CORP OF CHINA +2
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Problems solved by technology

At present, in the field of dynamic reconfiguration of distribution network, the solution is mainly based on traditional optimization methods and intelligent optimization algorithms, which can only obtain approximate suboptimal solutions and cannot theoretically prove that the obtained solutions are global optimal solutions. Therefore, using Convex optimization method for dynamic reconfiguration to reduce line loss still has room for improvement

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  • Dynamic reconstruction loss reduction method for power distribution network based on second-order cone relaxation method
  • Dynamic reconstruction loss reduction method for power distribution network based on second-order cone relaxation method
  • Dynamic reconstruction loss reduction method for power distribution network based on second-order cone relaxation method

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Embodiment Construction

[0066] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0067] The network loss of distribution network is an important indicator of distribution network operation economy, so it is of great significance to study the strategy of reducing the network loss rate of distribution network. Due to the difference in time and space distribution of loads during the operation of the distribution network, it may lead to problems such as unbalanced power flow distribution, node voltage collapse, and excessive network loss.

[0068]In this embodiment, the distribution network is divided into three functional areas: industrial area, commercial area, and residential area, and the differences in load curves in different areas are considered. In order to balance the power flow distribution of the distribution network, this embodiment aims at reducing the network loss, optimizes the switching state in each time period, conver...

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Abstract

The invention relates to the power system operation technology, and particularly relates to a dynamic reconstruction loss reduction method for a power distribution network based on a second-order conerelaxation method. The method gives consideration to the load characteristics of different functional areas in the power distribution network. A power distribution network dynamic reconstruction model is established with the aim of reducing the network loss, a power flow equation is converted into a convex optimization form through second-order cone relaxation, and a global optimal solution is quickly obtained, so that the network loss of the power distribution network can be considerably reduced and the voltage quality of the power distribution network can be improved through a small numberof switch changes. The method also solves the problems of unbalanced power flow distribution, node voltage collapse, over-high network loss and the like possibly caused by space-time distribution difference of loads in the operation process of the power distribution network.

Description

technical field [0001] The invention belongs to the technical field of power system operation, and in particular relates to a method for dynamic reconfiguration and loss reduction of distribution networks based on a second-order cone relaxation method. Background technique [0002] The line loss rate is an important indicator reflecting the economics of power supply of the distribution network. During the operation of the power grid enterprise, the line loss accounts for a part of the operating cost. With the continuous advancement of the new round of power system reform, the power grid will strengthen line loss management as an important means of corporate profitability. Since the distribution network usually adopts closed-loop design and open-loop operation, there are a large number of normally closed switches and a small number of tie switches in the distribution network, and the grid structure of the distribution network is usually fixed. However, because the load in th...

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Application Information

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IPC IPC(8): H02J3/06G06F17/50
Inventor 袁欣吴建林胡文博涂梦如徐铮
Owner STATE GRID CORP OF CHINA
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