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Variable pitch controller design method based on linear active disturbance rejection control

A technology of linear self-disturbance rejection and design method, which is applied in the direction of control algorithm type, engine control, wind engine control, etc., can solve the problems such as the performance of the pitch controller needs to be improved, and achieve the effect of optimal speed regulation performance

Active Publication Date: 2020-06-02
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in the AGC mode, in order to keep the system speed stable, the pitch controller needs to adjust the pitch rate according to the changes of the two operating conditions, the wind condition and the power command, and the performance of the existing pitch controller still needs to be improved.

Method used

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  • Variable pitch controller design method based on linear active disturbance rejection control
  • Variable pitch controller design method based on linear active disturbance rejection control
  • Variable pitch controller design method based on linear active disturbance rejection control

Examples

Experimental program
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Effect test

Embodiment

[0076] In this embodiment, the open-source professional wind turbine simulation software FAST (Fatigue, Aerodynamics, Structures, and Turbulence) provided by the US National Renewable Energy Laboratory (NREL) is used to simulate the control effect. The fan model adopts the 600kW CART3 test model developed by NERL, and its main parameters are shown in Table 1.

[0077] Table 1 Main parameters of NREL 600kW CART3 fan

[0078]

[0079] The present invention applies the linear active disturbance rejection pitch control and the traditional PI pitch control to perform simulations under complex operating conditions, and compares the simulation results.

[0080] A turbulent wind speed with a length of 300s and A-level turbulence intensity is selected for simulation, and a constantly changing power command is set. The wind speed and power command used in the simulation are shown in Figure 3(a). Instructions can simulate complex operating conditions. Figure 3(b) shows the generator...

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Abstract

The invention discloses a variable pitch controller design method based on linear active disturbance rejection control. When a fan participates in automatic power generation control of a power system,except for the wind speed, a power instruction of a power grid can also affect the operation stability of the fan, and the problem that a traditional variable pitch strategy cannot cope with complexchanges of the two operation working conditions and consequently rotation speed oscillation possibly occurs is solved. According to the variable pitch controller design method based on linear active disturbance rejection control, a variable pitch controller suitable for multiple operation working conditions is designed, the influence of different operation working conditions on the pitch angle adjustment pneumatic power sensitivity is fully considered, and the pitch angle adjustment rate can be rapidly adjusted according to the changes of the operation working conditions. Compared with a traditional method, the variable pitch controller design method has the advantages that the excellent rotation speed adjustment performance is achieved under different operation working conditions, and theoperation stability of a wind turbine generator is effectively improved.

Description

technical field [0001] The invention belongs to the field of wind turbine pitch control, and in particular relates to a design method of a pitch controller based on linear active disturbance rejection control. Background technique [0002] Due to the randomness of wind speed, large-scale wind power access will lead to greater fluctuations in power system frequency. Therefore, the development of wind power to participate in power system automatic generation control (Automatic Generation Control, AGC) is of great significance to improve the quality of power system frequency regulation. [0003] For the traditional maximum power point tracking (MPPT) operation mode, it aims at maximizing the benefits of a single machine, controls the speed of the wind rotor through the adjustment of electromagnetic power, and realizes the tracking of the maximum power point, and only when the output power reaches the rated power When the pitch angle will be activated. However, in the AGC mode,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/00
CPCF03D7/00F05B2270/328F05B2270/704Y02E10/72
Inventor 瞿佳刘陈载宇殷明慧邹云卜京周连俊谢云云王静波顾伟徐畅李阳
Owner NANJING UNIV OF SCI & TECH