Wind driven generator set

Abstract

The invention discloses a wind driven generator set, which is characterized by comprising at least one direct-driving synchronous wind driven generator, at least one doubly-fed induction wind driven generator and a synchronizing converter, wherein each direct-driving synchronous wind driven generator and each doubly-fed induction wind driven generator are provided with own generator side converters used for converting low frequency alternating current sent by the corresponding generators into direct current; the output ends of the converters of all the wind driven generators are connected in parallel to a direct current bus of the input end of the synchronizing converter to gather all the direct currents; and the synchronizing converter converts the gathered direct current into power frequency alternating current, and the power frequency alternating current is connected to a power grid.

Description

technical field [0001] The invention relates to the field of wind power generation, and integrates two types of wind power generators, the direct-drive synchronous motor and the doubly-fed induction motor, which are currently popular, so as to better convert wind energy into electric energy. Background technique [0002] Variable-speed constant-frequency wind turbines can make better use of wind energy than constant-speed wind turbines. The variable-speed constant-frequency wind turbine means that on the one hand, the motor should run at different speeds according to different flying wind speeds, and on the other hand, it must ensure that the frequency of the grid-connected current is always the power frequency. In the field of wind power generation, fixed-speed wind turbines are gradually replaced by variable-speed constant-frequency wind turbines. With the development of wind power technology, the current doubly-fed induction wind generators and direct drive synchronous w...

AI Technical Summary

Problems solved by technology

However, it requires a high-power gearbox, poor maintainability, high cut-in wind speed, and when the wind speed is too high, the grid voltage drops or the voltage is unbalanced, the rotor will induce high terminal voltage and easily lose the converter power tube (doubly-fed motor stator current waveform see Figure 5 , the temperature rise curve of the power tube of the doubly-fed converter operating at full power is shown in Image 6 )

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