Grid-connected point power control method and device for offshore converter station

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

Active Publication Date: 2021-03-16
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 th

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  • Grid-connected point power control method and device for offshore converter station
  • Grid-connected point power control method and device for offshore converter station
  • Grid-connected point power control method and device for 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 invention discloses a grid-connected point power control method and device for an offshore converter station. The method comprises the steps that the direct-current voltage Udcoff of the offshoreconverter station is acquired in real time; when it is judged that the direct-current voltage Udcoff is smaller than a first voltage threshold value Udc1, the amplitude reference value Vrmsoft of thealternating-current voltage of the offshore converter station is kept unchanged; when it is judged that the direct-current voltage Udcoff is larger than a first voltage threshold Udc1 and smaller thana second voltage threshold Udc2, the amplitude reference value Vrmsoft is adjusted through a first preset voltage adjusting formula; when it is judged that the direct-current voltage Udcoff is largerthan a second voltage threshold Udc2 and smaller than a third voltage threshold Udc3, the amplitude reference value Vrmsoft is adjusted through a second preset voltage adjusting formula; and the draught fan is controlled to adjust the output power of the draught fan based on the amplitude reference value Vrmsoft so as to reduce the feed-in power of the offshore wind power grid-connected point. The technical problem that in order to achieve a good control effect, an existing control method has high requirements for energy consumption design of an energy consumption device is solved.

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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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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