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Distribution network reliability evaluation method based on failure transfer feature of components

A technology of transfer characteristics and reliability, applied in the field of reliability assessment of distribution network based on fault transfer characteristics of components, can solve the problems of slow calculation speed and large calculation amount of analysis method.

Inactive Publication Date: 2008-05-28
HUNAN UNIV
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Problems solved by technology

[0004] In order to solve the technical problem of large amount of calculation and slow calculation speed of the existing failure mode effect analysis method of distribution network, the present invention provides a reliable distribution network based on fault transfer characteristics of components with fast calculation speed and high reliability. sex assessment method

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  • Distribution network reliability evaluation method based on failure transfer feature of components
  • Distribution network reliability evaluation method based on failure transfer feature of components
  • Distribution network reliability evaluation method based on failure transfer feature of components

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Embodiment Construction

[0035] see figure 1 , figure 1 It is a typical complex distribution network structure including backup power supply and multi-level branch lines. The connection points between components in the distribution network are called nodes, and a distribution network is also a component-node network. The network composed of series elements and single parallel elements on the path connecting the main power supply to the backup power supply in the distribution network is called the main network, such as figure 2 The solid-line network in . In the remaining part after deleting the main network from a distribution network, any connected network is called a branch network. The connection point between the branch network and the main network is called a branch node. A distribution network with an arbitrary structure has only one main network, and usually has multiple branch networks, and the power flow direction in each branch network is constant, and does not change with the switching ...

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Abstract

The invention relates to an evaluation method of distribution network reliability based on the fault transmission characteristic of an element. First, a fault at the downstream of a comprehensive branch network affects reliable parameters. Second, the branch network uses the reliable parameters to replace with an equivalent element and then adopts an FMEA method to acquire the comprehensive reliable parameters on each node and the downstream reliable parameters on each branch node, wherein, the reliable parameter is equal to the reliable parameters on each branch node. Third, the reliable parameters on each branch node element of the comprehensive branch network and the downstream reliable parameters on the first node obtain the downstream reliable parameters on the final node. Finally, the comprehensive countercurrent reliable parameters and the downstream reliable parameters obtain the comprehensive reliable parameters. The method is a rapid and reliable evaluation method equal to the FMEA method. The method designs the effect on reliable evaluation by the self fault of the switch element and supplies the defects in the prior method. The invention is suitable for a plurality of standby power supplies and a distribution network with any multi-branch by carrying out the combination of the power and every standby power supply.

Description

technical field [0001] The invention relates to a distribution network reliability evaluation method based on component fault transfer characteristics. Background technique [0002] The distribution network is an important part of the power system. Compared with the transmission network, it has more kilometers and a wider coverage, and has a greater impact on the reliability of electricity consumption. Statistical results show that about 80% of user power outages are caused by the distribution network. Therefore, it is of great significance to study fast and accurate reliability assessment methods applicable to distribution networks with arbitrary structures. [0003] The reliability assessment methods of distribution network mainly include simulation method and analytical method. The simulation method can give the probability distribution of the reliability parameters and provide users with a large amount of information. However, due to its time-consuming calculation, th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
Inventor 彭建春何禹清江辉
Owner HUNAN UNIV
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