Internal model control method for fixed pitch wind turbine

A control method and technology of an internal model controller, which are applied in the control of wind turbines, wind turbines, motors, etc., can solve the problems of increasing manufacturing and maintenance costs, complex pitch control systems, etc., and achieve simple structure, low cost, The effect of improving the efficiency of wind energy utilization

Inactive Publication Date: 2009-12-16
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

Because this type of wind turbine adopts a complex pitch contro

Method used

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  • Internal model control method for fixed pitch wind turbine
  • Internal model control method for fixed pitch wind turbine
  • Internal model control method for fixed pitch wind turbine

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Embodiment Construction

[0018] specific implementation plan

[0019] The block diagram of the fixed-pitch wind turbine system is shown in Figure (6). The wind turbine converts wind energy into mechanical energy. The permanent magnet synchronous motor rotates under the drive of the wind turbine, and converts the wind energy absorbed on the shaft into electrical energy. By controlling the PWM rectifier on the stator side of the generator, the electromagnetic torque of the generator can be adjusted, and then the wind force can be controlled. The purpose of machine speed. The grid-connected inverter manages the output power of the generator. The speed and current signals required by the control system are obtained by the speed sensor and the current sensor respectively. Using TMS320LF2407DSP controller to complete the design of the variable speed system of the fixed-pitch variable-speed wind turbine. The specific implementation plan is divided into two steps: 1) designing the electromagnetic torque co...

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Abstract

The invention discloses an internal model control method for a fixed pitch wind turbine, which belongs to wind power generation system control technology. The method compensates the disturbance of pneumatic torque by reconstructing an inverse formation internal model controller of a model, thereby ensuring the stability of a wind turbine when the wind turbine works above rated wind speed, namely works in a deep stall region. The variable speed control is performed on the fixed pitch wind turbine within the whole designed wind speed range, and the rotating speed of the wind turbine is adjusted by controlling the electromagnetic torque of a generator to achieve the aim of power control of the fixed pitch wind turbine; and the method improves the utilization efficiency of wind energy, overcomes the disadvantage that the fixed pitch wind turbine has poor output power characteristics above rated wind speed, solves the stability problem when the wind turbine operates in an unsteady torque area, and ensures that the wind turbine cannot run away or be shut off due to external disturbance.

Description

technical field [0001] The invention relates to an internal model control method of a fixed-pitch wind turbine, which belongs to the technical field of wind power generation system control. Background technique [0002] Due to energy shortage, the development and utilization of wind energy has attracted worldwide attention. At present, wind turbines widely used mainly include fixed-pitch stall-type wind turbines and variable-pitch wind turbines. Fixed-pitch stall-type wind turbines are widely used in wind power generation systems because of their simple structure, reliable performance, and no need for complex pitch control systems. However, due to the fixed speed, the wind turbine only has the maximum wind energy utilization coefficient at a certain wind speed point, so the wind energy utilization rate is low; and its blade pitch angle is fixed, and only depends on the stall of the blade itself in the high wind speed area The characteristics cannot realize the constant pow...

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Application Information

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IPC IPC(8): F03D7/00
CPCY02E10/723Y02E10/72
Inventor 胡祖荣马运东王俊琦邢岩
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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