Wind power generation system and method for controlling excitation synchronous generator thereof

A technology of wind power generation system and synchronous generator, which is used in the control of wind turbines, wind turbines, and control of generators through magnetic field changes, which can solve the problem that the voltage at the load terminal cannot be maintained constant, and the permanent magnet generator cannot control the size of the excitation field. , increase the cost of power generation equipment, etc.

CN103546080AActive Publication Date: 2014-01-29SUN YAT SEN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2014-01-29

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Abstract

A stand-alone wind power generation system and a method for controlling an excitation synchronous generator thereof are provided. In this method, an input wind power is transformed into an electrical power and outputted to a load. With the use of a coaxial configuration, a windmill, a speed-increasing gearbox, the excitation synchronous generator, and a motor are integrated in the same shaft. The output voltage of the generator is stabilized by an excitation field control. With the use of a motor servo control, the speed of generator can be stabilized under a wind disturbance condition. Therefore, the output power and frequency can be stable. A power flow management unit can control battery sets to charge and discharge, so as to accomplish the proposed control method.
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Description

technical field

[0001] The invention relates to a generator and a control method thereof, and in particular to a control method applied to an independent power supply type wind power generation system and an excitation synchronous generator thereof. The wind power generation system can be controlled by coaxial configuration and excitation field, so that the excitation synchronous generator can convert the input wind energy into electric energy output, and use the motor to perform the speed servo control of the excitation synchronous generator. Through the combination of the storage battery and the power converter, and the energy flow management control method formed by measuring the input energy of the motor, the energy is stored and released, so that the excitation synchronous generator can be applied to an independent power supply type wind power generation system. Background technique

[0002] At present, the general power generation system architecture is based on the pe...

Examples

Embodiment Construction

[0012] see figure 1 , which shows a control architecture diagram of an excitation synchronous generator of an independent power supply type wind power generation system according to an embodiment of the present invention. The method of the present invention can be applied to a wind power generation system (such as the following embodiments), but is not limited thereto, it can also be applied to other power generation systems, such as hydropower, thermal power, ocean current and tidal power generation, and the scope of the application field of the present invention can be Renewable energy control technology related to various power generation systems.

[0013] see again figure 1 , the power generation system includes a fan 10, a transmission shaft 11, a speed increaser 20, an excitation synchronous generator 30, a motor 40, a driver 41, an encoder 42, a current detector 43, a step-up converter 50, and a battery pack 51 , a rectifier and step-down converter 53 , a load 60 , an...