Method for assessing power distribution reliability of large-scale medium-voltage distribution network based on modes

A grid power supply and reliability technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve the problems of large modeling workload, failure to take into account accuracy and engineering practicability, etc., to reduce the amount of calculation, reduce Modeling workload and the effect of improving power supply reliability

Active Publication Date: 2011-03-09
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology

Existing methods for reliability assessment of large-scale and complex power distribution systems are often improved on the basis of methods such as the minimum path method and t

Method used

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  • Method for assessing power distribution reliability of large-scale medium-voltage distribution network based on modes
  • Method for assessing power distribution reliability of large-scale medium-voltage distribution network based on modes
  • Method for assessing power distribution reliability of large-scale medium-voltage distribution network based on modes

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Embodiment Construction

[0033] This method is mainly aimed at the power supply reliability assessment of large-scale medium-voltage distribution network, and the specific implementation scheme is as follows.

[0034] (1) Simplified modeling

[0035] Firstly, the network structure of the line should be basically simplified, so as to facilitate the subsequent line mode analysis and accurate modeling of typical lines. The simplification means are as follows:

[0036] ●Load point merging: merge multiple loads in the same segment into multiple users on one load point.

[0037] ●Line segment simplification: Merge all line segments separated by no switch into one line segment; under the premise of not affecting the connection relationship, some shorter line segments are ignored.

[0038] ●Merge branch lines: Merge the branch lines that are closer together.

[0039] After the simplification of the above means, the number of line segments and load points of each line can be effectively reduced, and a simpl...

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Abstract

The invention provides a method for assessing the power distribution reliability of a large-scale medium-voltage distribution network based on modes. For the large-scale medium-voltage distribution network, the detailed assessment and analysis of power distribution reliability has a large amount of work load and implement difficulty. In the method of the invention, similarities of lines in structural characteristic, electric characteristic, power distribution reliability and other aspects in the distribution networks of the same area are considered, thus the structural characteristic of one set of lines is selected as the basis of classification, and the lines with the similar structural characteristic belong to the same mode, wherein the reliability index of each mode is represented by typical lines therein, thereby greatly reducing the work load and analysis difficulty of reliability assessment. The classification method of the mode is mainly based on the relative factors of the distribution network structure, thus the mode is called as a network reliability characteristic mode. The method is applied to the assessment of the power distribution reliability of the large-scale medium-voltage distribution network.

Description

technical field [0001] The invention belongs to the field of power grid planning and construction, and relates to a model-based large-scale medium-voltage distribution network power supply reliability evaluation method. Background technique [0002] The quantitative evaluation of the reliability of distribution network power supply is based on the existing operating state of the distribution network, in order to plan, design and build a new system, or expand, transform and develop the reliability of the existing distribution network power supply capacity. estimate. The reliability of different distribution network planning and reconstruction schemes is compared through reliability evaluation, and an economical and reasonable scheme is finally determined. Quantitative evaluation of distribution network power supply reliability can improve and promote the production technology and management of the power industry, and provide a scientific basis for distribution network planni...

Claims

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Application Information

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IPC IPC(8): H02J3/00G06Q50/00G06Q50/06
Inventor 刘伟苏剑赵大溥崔艳妍周莉梅钱朝阳王之伟王旭陈楷龙禹杨林张谦
Owner CHINA ELECTRIC POWER RES INST
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