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Directed relational graph-based power distribution network reliability evaluation method

A technology of distribution network and relationship diagram, applied in electrical components, circuit devices, AC network circuits, etc., can solve the difficulty of establishing failure mode consequence table, the difficulty of evaluating the reliability of complex distribution network, and the difficulty in obtaining complex distribution network. Equivalent network, etc.

Active Publication Date: 2015-04-01
STATE GRID CORP OF CHINA +1
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Problems solved by technology

However, when the structure of the distribution network is complex, it will be very difficult to establish the failure mode consequence table, so it is very difficult to directly use the failure mode consequence analysis method to evaluate the reliability of the complex distribution network
The network equivalent technology for reliability evaluation of complex distribution network is used to simplify the reliability evaluation steps of distribution network. However, when there are many sub-feeders in the distribution network, it will be difficult to obtain the equivalent network of complex distribution network

Method used

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  • Directed relational graph-based power distribution network reliability evaluation method
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Embodiment Construction

[0065] Such as figure 1 As shown, the present invention includes a distribution network reliability assessment method based on a directed graph, which is characterized in that: comprising the following steps:

[0066] A: Collect the structural data, electrical parameter data and reliability parameter data of the distribution network to be evaluated;

[0067] B: According to the data collected in step A, divide and classify the network structure of the distribution network;

[0068] Based on the different effects of faults on different components in the distribution network, the distribution network is divided into blocks and graded according to the following steps:

[0069] B1: Divide the first-stage circuit breaker directly connected to the busbar of the main network into the first-level circuit breaker, and record it as CB11;

[0070] B2: In the fault-free running state of the system, based on the depth-first search algorithm, starting from CB11, start searching for compon...

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Abstract

The invention discloses a directed relational graph-based power distribution network reliability evaluation method. According to the method, a power distribution network is divided into protection zones (CZ) of different levels and feeder layers (FS) according to protection zones of circuit breakers in the power distribution network and segmental acting of disconnecting switches in feeders, so that a digraph of the power distribution network can be constructed; and the digraph can be conveniently applied to reliability evaluation of the power distribution network and can be directly applied to a power distribution network with a distributed power source; the greater an ASAI value is, the higher reliability is, and the smaller the SAIFI, SAIDI, CAIDI and AENS values are, the higher the reliability is, and therefore, the reliability of the power distribution network system can be evaluated. The directed relational graph-based power distribution network reliability evaluation method of the invention can be widely applied to the reliability evaluation of medium-voltage power distribution networks. With the directed relational graph-based power distribution network reliability evaluation adopted, defects of an existing failure mode and effect analysis method and blocking algorithm can be eliminated.

Description

technical field [0001] The invention relates to the technical field of safe and reliable operation of a distribution network, in particular to a distribution network reliability evaluation method based on a directed relation graph. It can be used not only for the reliability assessment of the traditional distribution network, but also for the reliability assessment of the distribution network with distributed power generation. Background technique [0002] The distribution network is the link that directly faces users in the power system, and has the most direct impact on the quality and reliability of power supply for users. The reliability evaluation of the distribution network can improve the reliability of the distribution network, ensure the quality of power supply, and promote It is of great significance to improve the production technology, management, and economic and social benefits of the electric power industry. [0003] The traditional distribution network relia...

Claims

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Application Information

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IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 王文博冯光周宁马建伟谢开贵胡博杨贺钧
Owner STATE GRID CORP OF CHINA
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