Reactive power coordinated control method for wind power generator set and static var generator (SVG) equipment in wind power plant

Abstract

The invention discloses a reactive power coordinated control method for a wind power generator set and static var generator (SVG) equipment in a wind power plant. The reactive power coordinated control method comprises the steps of acquiring a target reactive power Delta Q of the wind power plant, controlling the SVG equipment to perform reactive power adjustment according to the target reactive power Delta Q until the reactive power of the wind power plant reaches the target reactive power Delta Q, and controlling a draught fan of the wind power generation set to substitute the SVG equipment to perform reactive power output or controlling the draught fan to increase the reactive power so as to substitute a part of the reactive power output of the SVG equipment. According to the reactive power coordinated control method, different adjustment amplitudes and adjustment speeds of the wind power generator set and an SVG are combined, the SVG is used for adjustment, the reactive power of the SVG is gradually substituted by the reactive power of the wind power generator set, so that the active power loss of the SVG is reduced, the dynamic reactive power storage of the SVG is maintained, and the internal power loss of the wind power plant is reduced on the condition that the voltage adjustment requirement is met.

Description

technical field [0001] The invention belongs to the field of electric power system control, and relates to a reactive power cooperative control method of wind turbines and SVG equipment in a wind farm. Background technique [0002] At present, the reactive power control of wind farms is generally completed by SVG. SVG has a fast response speed and high adjustment accuracy. However, when SVG adjusts reactive power, there will be active power loss, and SVG is a dynamic reactive power adjustment device. It should maintain its reactive power reserve to Respond to reactive power adjustment requirements under fault conditions. [0003] In order to reduce the active power loss of SVG, maintain the reactive power reserve of SVG, and improve the regulation performance of wind turbines, it is necessary to coordinate the reactive power control of wind turbines and SVGs. [0004] In view of this, the present invention is proposed. Contents of the invention [0005] The technical pro...

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Problems solved by technology

[0002] At present, the reactive power control of wind farms is generally completed by SVG. SVG has a fast response speed and high adjustment accuracy. However, when SVG adjusts reactive power, there will be active power loss, and SVG is a dynamic reactive power adjustment device. It should maintain its reactive power reserve to Response to reactive power adjustment requirements under fault conditions

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