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

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.

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...

AI Technical Summary

Problems solved by technology

[0002] At present, the general power generation system architecture is based on the permanent magnet generator as the main power generation equipment. It needs to use AC-DC, battery and DC-AC converter equipment to convert the input power and output it. Such a conversion method will cause power conversion. Power loss reduces the conversion rate of the overall power generation system and increases the cost of power generation equipment

When the input wind energy changes and the output load increases, since the permanent magnet generator cannot control the size of its excitation field, when the energy required by the load end increases, it may cause the voltage at the load end to be unable to maintain a constant value and reduce the quality of the output power supply

Images