Full wind speed power control method for fixed propeller pitch variable speed wind power generator set

Abstract

The invention discloses a full wind speed power control method for fixed propeller pitch variable speed wind power generator set, belonging to control method in technical field of wind power generation and realizing aim of controlling fixed propeller pitch variable speed wind power generator set to operate safely and efficiently at different wind speeds. The control method consists of three parts: (1) rotating speed adjustment link; (2) maximum power tracking link; and (3) maximum power limiting link. The rotating speed adjustment link comprises a rotating speed adjuster P1D1; the maximum power tracking and controlling link comprises rotating speed feedback optimal power control algorithm and an adjuster P1D2; and the maximum power limiting link comprises a pneumatic power observer and an adjuster P1D3. By using the control method in the invention, maximum power tracking under the wind speed corresponding to rating rotating speed of the set, constant rotating speed operation over the wind speed corresponding to the rating rotating speed and under the rating wind speed, constant power operation over the rating rotating speed, and soft switching among the three working conditions can be conveniently realized. The invention has certain application prospect in fixed propeller pitch variable speed wind power generator set in China.

Description

technical field [0001] The invention relates to a control method in the technical field of wind power generators, which realizes the control objectives required by fixed-pitch and variable-speed wind power generators in different wind speed segments, that is, the maximum power output is realized below the wind speed corresponding to the rated speed, and the maximum power output is achieved at the wind speed corresponding to the rated speed. Constant speed operation is realized above the wind speed and below the rated wind speed, and constant power operation is realized above the rated wind speed. technical background [0002] As a clean renewable energy, wind energy has been widely developed and utilized in recent years, especially wind power technology, which has become a hot spot at home and abroad. Due to the randomness and volatility of wind energy resources, both the wind direction and the wind speed are constantly changing, so the energy generated by the wind turbine a...

AI Technical Summary

Problems solved by technology

The fixed-pitch unit has the advantages of simple mechanism and high reliability, but there are also some inherent defects: the performance of the wind turbine is limited by the stall performance of the blades

But correspondingly, the introduction of variable pitch control and actuators will undoubtedly increase the complexity of the unit, and also increase the cost of manufacturing and maintenance of the unit, with both advantages and disadvantages

In the literature "Survey of Failures in Wind Power Systems with Focus on Swedish Wind Power Plants during 1997-2005", JohanRibrant et al. objectively analyzed the reliability of each component of wind turbines in the current wind power market. The reliability of the electronic control system needs to be further improved

In addition, domestic research on variable pitch power regulation technology is still in its infancy, and the core technology is still monopolized by other advanced countries

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