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A grid-connected point power control method and device for an offshore converter station

A power control and converter station technology, applied in the direction of circuit devices, AC network circuits, power transmission AC networks, etc.

Active Publication Date: 2021-11-02
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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Problems solved by technology

[0005] The embodiment of the present application provides a power control method and device for a grid-connected point of an offshore converter station, which solves the problem that the current control method has high requirements for the energy consumption design of the energy consumption device in order to achieve a better control effect technical problem

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  • A grid-connected point power control method and device for an offshore converter station
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  • A grid-connected point power control method and device for an offshore converter station

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Embodiment Construction

[0041] The embodiment of the present application provides a power control method and device for a grid-connected point of an offshore converter station, which solves the problem that the current control method has high requirements for the energy consumption design of the energy consumption device in order to achieve a better control effect technical problem.

[0042]In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[00...

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Abstract

The present application discloses a power control method and device for a grid connection point of an offshore converter station, wherein the method includes: obtaining the DC voltage U of the offshore converter station in real time dcoff ; When judging the DC voltage U dcoff less than the first voltage threshold U dc1 When , maintain the amplitude reference value V of the AC voltage of the offshore converter station rmsoff unchanged; when it is judged that the DC voltage U dcoff greater than the first voltage threshold U dc1 And less than the second voltage threshold U dc2 When , the amplitude reference value V is adjusted through the first preset voltage adjustment formula rmsoff ; When judging the DC voltage U dcoff greater than the second voltage threshold U dc2 And less than the third voltage threshold U dc3 When , adjust the amplitude reference value V through the second preset voltage adjustment formula rmsoff ;Control the fans based on the amplitude reference value V rmsoff Adjust the output power of wind turbines to reduce the feed-in power of offshore wind power grid-connected points. It solves the technical problem that the current control method has higher requirements on the energy consumption design of the energy consumption device in order to achieve a better control effect.

Description

technical field [0001] The present application relates to the technical field of direct current transmission technology, in particular to a power control method and device for a grid-connected point of an offshore converter station. Background technique [0002] At present, there are several flexible DC transmission technologies at home and abroad that have been used in engineering planning for large-scale offshore wind farms to be integrated into onshore main grids. Among them, many challenges brought by the access of large-scale wind power to the main grid are still problems to be faced today, especially the requirements for the safety and stability of the grid under various fault conditions. [0003] Based on the MMC-HVDC DC transmission system, the main grid system and the offshore wind farm system can be isolated, so that the short-circuit fault of the main grid system cannot be transmitted to the offshore wind farm, and thus will not affect the normal operation of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/46H02J3/36
CPCH02J3/36H02J3/46H02J2203/20H02J2300/28Y02E10/76Y02E60/60
Inventor 陈怡静高志华黄伟煌敖健永彭发喜李岩谭涛亮赵晓斌余浩许树楷胡圣青
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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