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Control method for stall-controlled wind turbine generator system

A technology of wind power generators and control methods, which is applied to the control of wind power generators, wind power generators, wind power generation, etc., and can solve problems such as the inability to actively control the generator torque, and achieve considerable economic benefits and good economical effects

Inactive Publication Date: 2016-01-20
北京科诺伟业科技股份有限公司 +1
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  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the defect that the fixed-pitch stall-type unit can reach the maximum wind energy utilization coefficient at only one wind speed point below the rated wind speed, and cannot actively control the generator torque above the rated wind speed, and proposes a fixed-pitch stall-type unit. Control method of power generation efficiency

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  • Control method for stall-controlled wind turbine generator system
  • Control method for stall-controlled wind turbine generator system
  • Control method for stall-controlled wind turbine generator system

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Embodiment Construction

[0046] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0047]The present invention completes the transition from constant-speed and fixed-propeller control to variable-speed and fixed-propeller control by adding a full-power converter to the tower base and cooperating with the control system. The maximum wind energy utilization coefficient can be realized within the speed range, and the active control of the unit under high wind speed is very economical for improving the power generation efficiency of the unit.

[0048] Such as Figure 4 As shown, the fixed-pitch stall-type wind power generating set applied to the control method of the present invention includes an impeller, a speed-up gearbox, a generator, a full-power converter, a control system, and a tower. Driven by the wind, the wind wheel rotates, realizing the conversion of wind energy to mechanical energy. The rotating wind wheel drives t...

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Abstract

The invention provides a control method for a stall-controlled wind turbine generator system. According to the method, conversion from constant-speed and fixed-propeller type control to variable-speed and fixed-propeller type control is completed by adding a full-power converter to be matched with a control system; a wind speed-power curve and a rotation speed-torque control curve of an improved control system are obtained through calculation so that the maximum wind energy utilization coefficient of the wind turbine generator system can be realized at a low wind speed within a wide rotation speed range; the system conducts active control at a high wind speed, and good economy on improving the generating efficiency of the stall-controlled wind turbine generator system is realized.

Description

technical field [0001] The invention relates to a control method of a three-blade fixed-pitch stall type wind power generating set. Background technique [0002] As a clean renewable energy, wind energy has been paid more and more attention and developed at home and abroad, and how to break through the existing technology and convert wind energy into electric energy to the greatest extent is an eternal pursuit of wind power technology. At present, there are still a batch of three-blade fixed-pitch stall-type wind turbines in the market. is fixed, which makes only one point on the wind speed-power curve have the maximum wind energy utilization coefficient. In addition, due to the characteristics of the blades, they quickly enter a stall state at high wind speeds, resulting in fixed-pitch stall-type units capturing wind energy. The ability is poor, and it is difficult for the owner to obtain better economic benefits. [0003] figure 1 Shown is a typical output wind speed-po...

Claims

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Application Information

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IPC IPC(8): F03D7/04H02P9/04H02P101/15
CPCY02E10/72
Inventor 张小川许洪华
Owner 北京科诺伟业科技股份有限公司
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