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Method of evaluating reliability of offshore converter station

A converter station, reliability technology, applied in the direction of AC network circuits, electrical components, circuit devices, etc., can solve problems such as blank reliability research, and achieve the effect of continuous and efficient work

Inactive Publication Date: 2017-05-31
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the number of offshore converter station projects based on flexible direct current transmission technology is increasing, the overall reliability research on the project is still blank.

Method used

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  • Method of evaluating reliability of offshore converter station
  • Method of evaluating reliability of offshore converter station
  • Method of evaluating reliability of offshore converter station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The method for evaluating the reliability of offshore converter stations provided by the present invention includes:

[0043] First of all, according to the mean time to repair (MTTR) of its products provided by various electrical equipment manufacturers, that is, the average time required to repair equipment after a failure, the mean time between failures (MTBF), that is, the average interval between one failure and the next failure The time to calculate the availability index A of a single piece of equipment i , the calculation process is as follows:

[0044]

[0045] as attached figure 1 The internal electrical system structure of a typical offshore converter station based on flexible direct current transmission technology is shown, and all electrical equipment is divided into multiple subsystems. Among them, the modular multi-level technology offshore converter station adopted by the current mainstream flexible DC transmission projects contains multiple bridge ...

Embodiment 2

[0052] to attach figure 1 Taking the flexible DC offshore converter station shown as an example, the converter station is divided into the following converter station subsystems:

[0053] GIS, transformer, bridge arm of converter valve, converter valve, smoothing reactor, control protection system and auxiliary system.

[0054] The control and protection subsystem includes valve control and protection system, converter station level control and protection system, DC side control and protection system and all control and protection systems in the converter station. The auxiliary system includes station power system, cooling system, auxiliary power supply system, etc.

[0055] Calculate the availability of each subsystem according to the availability of each device in the subsystem:

[0056] Availability A of each subsystem of the converter station subsystem-i Calculate according to the formula:

[0057]

[0058] Among them, N: indicates the number of each device in the su...

Embodiment 3

[0066] For the converter station of the offshore bipolar flexible direct current transmission system, the availability rate A of the unipolar line of the converter station is obtained by calculating the availability rate of the internal equipment of the unipolar line according to the above method single ; Calculate the availability A of the converter station of the overall bipolar flexible direct current transmission system according to the availability of the internal subsystems of the motor line double ;Evaluate the reliability of the converter station according to the overall availability of the converter station;

[0067] Calculate the availability rate A of the unipolar line according to the following formula single :

[0068]

[0069] In the formula, M': represents the number of internal subsystems of the unipolar line; A s-i ': Indicates the availability of the internal subsystem of the unipolar line, obtained by the following formula:

[0070]

[0071] In the ...

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Abstract

The invention provides a method of evaluating reliability of an offshore converter station; the method comprises: calculating availability of a converter station subsystem according to availability of electrical equipment in the offshore converter station; calculating total availability of the converter station according to the availability of the converter station subsystem; evaluating reliability of the converter station according to the total availability of the converter station. The method according to the technical scheme provided herein has the advantages that effectively extended continuous working time and effectively improved working efficiency are given to the converter station, converter station reliability evaluation basis is provided for the early study phase of a project, and technical support is provided for project construction.

Description

technical field [0001] The invention relates to the field of reliability evaluation of converter stations, in particular to a method for evaluating the reliability of offshore converter stations. Background technique [0002] The energy efficiency of offshore wind energy resources is 20% to 40% higher than that of land wind farms. It has the advantages of large power, stable operation, and long service life of units. It is the main direction of wind power development in the future. With the continuous expansion of the scale of offshore wind farms, offshore converter stations have become an indispensable part of the project. In recent years, the construction of offshore converter stations is experiencing unprecedented growth worldwide. [0003] Modular multi-level flexible DC transmission technology is especially suitable for powering offshore platform systems due to its flexible and controllable technical characteristics, as well as the advantages of environmental protection...

Claims

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Application Information

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IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 周季许韦华阳岳希王晓宇涂莉别晓玉李泓志
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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