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Maximum wind energy tracking control method for variable-speed constant-frequency wind power generation

A technology of maximum wind energy tracking and control method, which is applied in the control system, control generator, adaptive control and other directions to achieve the effect of simple control, good rapidity and improvement of wind energy utilization coefficient

Inactive Publication Date: 2012-05-16
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

However, this method still needs the original optimal power-speed curve of the wind turbine, and does not fully utilize the advantages of the hill-climbing method, which does not need to know the power characteristic parameters and wind speed parameters of the wind turbine.

Method used

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  • Maximum wind energy tracking control method for variable-speed constant-frequency wind power generation
  • Maximum wind energy tracking control method for variable-speed constant-frequency wind power generation
  • Maximum wind energy tracking control method for variable-speed constant-frequency wind power generation

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Embodiment Construction

[0017] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0018] Improvement of the disturbance observation method: 1. The method of judging the stable operation of wind turbines

[0019] In order to ensure the reliable work of P&O, it must wait for the system to run stably before implementing new disturbances. Equation (1) describes the relationship between the wind turbine output mechanical power and the system output power (excluding friction power)

[0020] P m = 1 η P out + Jω dω dt - - - ( 1 )

[0021] where P m is the output power of the wind turbine, η is the efficiency from the generator to the measurement point of the output power, P out is t...

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Abstract

The invention relates to a maximum wind energy tracking control method for variable-speed constant-frequency wind power generation, which belongs to the field of wind power generator set control. The method does not need to previously know the optimal performance curve of a wind power generator set, uses the improved perturbation and observation process and the power signal feedback process basedon different power-rotating speed curves to carry out on-line searching, and records the information of the ratio of power to cubic rotating speed at the maximum power point. When switching to the power signal feedback process from the perturbation and observation process, the power-rotating speed curve on which the power signal feedback process is based can be obtained according to the recorded information; and after finishing recording the information, an optimal power-rotating speed curve can be obtained, and at this time, only the power signal feedback process is adopted. The method can obtain the optimal power-rotating speed curve of the wind power generator set on line according to the actual operating environment of the wind power generator set, and effectively realizes the maximumwind energy tracking. The invention is suitable for variable-speed constant-frequency wind power generation systems.

Description

technical field [0001] The invention relates to a maximum wind energy tracking control method for variable-speed constant-frequency wind power generation, which belongs to the field of wind power generator control. Background technique [0002] Wind energy is a clean and renewable energy. With the intensification of the global greenhouse effect, the depletion of fossil energy and the maturity of wind power generation technology, countries all over the world have accelerated the pace of development and utilization of wind energy. Wind power generation technology has developed from constant speed and constant frequency to variable speed and constant frequency. One of the advantages of the latter over the former is that through the speed control of wind turbines, the maximum wind energy tracking of the wind power generation system can be realized and the utilization rate of wind energy can be improved. [0003] "A Novel Algorithm for Fast and Efficient Maximum Power Point Track...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P9/00G05F1/67G05B13/02
Inventor 左广杰周波郭鸿浩魏佳丹唐国芬
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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