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Megawatt wind generating set combination control policy

A technology for wind turbines and wind turbines, which is applied in the control of wind turbines, wind turbines, wind energy power generation, etc. The effect of load shock, smooth and sensitive switching, and improved running performance

Inactive Publication Date: 2010-03-03
南京智昊置业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is: the switching mode of the torque control and the pitch control of the existing variable speed variable pitch wind turbine will cause the load impact of the pitch actuator, the transmission system and the converter generator, and Frequent power drops will occur, which will adversely affect the power grid and reduce the life of mechanical equipment

Method used

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  • Megawatt wind generating set combination control policy
  • Megawatt wind generating set combination control policy
  • Megawatt wind generating set combination control policy

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Embodiment Construction

[0018] The schematic block diagram of the combined control strategy of megawatt-level wind power generators in the present invention is as follows figure 1 As shown, it includes torque PID controller 1, variable pitch PID controller 2, deviation gainer 3, pitch angle gainer 4, notch filter 5, speed deviation generator 6, torque deviation generator 7, Power Command Generator8.

[0019] figure 1 middle:

[0020] ω 风轮 : Measured wind turbine rotor speed;

[0021] ω 滤波 : Wind rotor speed after notch filter processing;

[0022] ω 设定 : Wind turbine rotor speed setting value;

[0023] T 测量 : measured generator torque;

[0024] T 指令 : generator torque command;

[0025] beta 测量 : Measured wind turbine pitch angle;

[0026] beta 设定 : Wind turbine pitch angle setting value;

[0027] P 指令 : wind turbine power command value;

[0028] e 偏差 : joint deviation;

[0029] Conversion coefficient k: used for dimension conversion and deviation adjustment;

[0030] Torque PID con...

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Abstract

The invention relates to a megawatt wind generating set combination control policy. When the wind speed of a wind generator fluctuates at rated wind speed, a torque control policy and feather control policy simultaneously remain in operation state, so as to realize undisturbed switching between a feather PID controller and a torque PID controller. The invention makes the best of the integral saturation characteristic of PID algorithm, so that switching between the torque PID controller and the feather PID controller is smooth and sensitive, mutual interference between the feather controller and the torque controller in the previous switch mode switching process while only one controller is ensured to operate at the same time, drastic fluctuation of wind generator power when the wind speedfluctuates at the rated wind speed is avoided, further load impact is reduced, electric energy quality is improved, reliability of the wind generating set is improved, and operation performance of the wind generating set is improved.

Description

technical field [0001] The invention relates to a control strategy of a wind power generator, which is used in a control system of a megawatt-level variable-pitch wind power generating set to realize a smooth transition between a torque control strategy and a pitch-variable control strategy, and is a megawatt-level wind power generation Unit joint control strategy. Background technique [0002] In recent years, the wind power industry has developed rapidly in China. Mechanical components such as gearboxes, generators, and hubs have basically been produced domestically. However, the design technology and control system of the whole machine are basically imported from abroad, and domestic production has only been realized. Unit assembly work. Foreign wind power companies have set up great barriers to domestic control technology. In order to break the foreign monopoly situation, some R&D institutions and companies have begun to develop their own wind turbine control systems. H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/00
CPCY02E10/723Y02E10/72
Inventor 俞斌屈虎杜煜赵文庆
Owner 南京智昊置业有限公司
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