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Method for acquiring the reliability of direct-current power transmission system based on parameter matrix

A technology of direct current transmission system and parameter matrix, which is applied in the direction of electric digital data processing, special data processing application, electric power transmission AC network, etc., and can solve the problems of small number of system capacity states and cumbersome problems

Inactive Publication Date: 2015-07-08
STATE GRID CORP OF CHINA +3
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional frequency and duration method is accurate, but the process of establishing a state space diagram is very cumbersome. In order to simplify the calculation, the number of system capacity states considered is small

Method used

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  • Method for acquiring the reliability of direct-current power transmission system based on parameter matrix
  • Method for acquiring the reliability of direct-current power transmission system based on parameter matrix
  • Method for acquiring the reliability of direct-current power transmission system based on parameter matrix

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Embodiment 1

[0075] The structure of the direct current transmission system is as follows figure 1 As shown, the DC side connection mode is the neutral point grounding method at both ends of the bipolar, the transmission line is 72km long, the rated capacity of the line is 1200MW, the rated capacity of the converter station is 1200MW, and the system reference capacity is set to 1200MW, the system component parameters, The equivalent capacity of the AC filter and compensation capacitor, and the equivalent capacity of the DC capacitor are shown in Tables 1, 2, and 3, respectively.

[0076] Table 1

[0077]

[0078] Table 2

[0079]

[0080] table 3

[0081]

[0082] 1) Analyze the system structure, component connection methods, etc., and obtain the system reliability block diagram, such as figure 2 shown.

[0083] 2) Obtain the reliability model of each component by using the state space method, and combine the components to obtain the reliability model of the subsystem.

[00...

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Abstract

The invention discloses a method for acquiring the reliability of a direct-current power transmission system based on parameter matrix, comprising the following steps: determining a system reliability block diagram according to the topology and the running status of a direct-current power transmission system; extracting running statistical information of each component and calculating to obtain reliability parameters of the component, and establishing subsystem reliability models according to the mode of component connection; combining the subsystem reliability models by a parameter matrix method and calculating to obtain a direct-current power transmission system reliability model; and selecting reliability indexes, and calculating the reliability indexes on the basis of the system reliability model, so as to achieve the purpose of direct-current power transmission system reliability evaluation.

Description

technical field [0001] The invention belongs to the field of power system reliability analysis and relates to a method for obtaining the reliability of a direct current transmission system based on parameter matrixing. Background technique [0002] In recent years, the actual projects of HVDC transmission have been increasing. This technology is currently mainly used for long-distance high-power transmission, large-scale networking, and underground or submarine cable power transmission. The improvement of its reliability will also bring huge benefits to the safe, reliable and economical operation of the entire power system. Therefore, it is a very important task to quantitatively evaluate the reliability of HVDC transmission system, analyze various influencing factors, and propose corresponding countermeasures. [0003] Compared with the reliability research of AC system, the reliability research of HVDC transmission system started relatively late. In terms of reliability ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/36G06F19/00
CPCY02E60/60
Inventor 刘杰王秀丽郭静丽宁联辉
Owner STATE GRID CORP OF CHINA
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