WIND DRIVEN GENERATOR AND POWER CONVERSION CIRCUIT CONTROL METHOD AND DEVICE THEREOF

WIPO Patent Application WO/2021/254031

A1

The present application provides a wind driven generator and a power conversion circuit control method and device thereof. The control method comprises: obtaining a direct-current bus voltage of a direct-current bus; if the direct-current bus voltage is higher than a first preset value, controlling some of power switches of a generator-side converter to be turned on, so that an armature resistor of the motor is communicated with the direct-current bus, and electric energy of the direct-current bus is discharged; and if the direct-current bus voltage is lower than a second preset value, controlling some of power switches of the generator-side converter to be turned off so as to disconnect the armature resistor of the motor and the direct-current bus, and end discharging, the second preset value being lower than the first preset value. When the direct-current bus voltage increases, the direct-current bus voltage is controlled within a voltage withstanding range, and normal grid-connected operation of the motor is guaranteed, thereby protecting the motor, the direct-current bus and the wind driven generator against damage.

ZHANG LUHUA (CN)
CHEN XIAOJING (CN)
LIU JIAMING (CN)
GE HAOXIANG (CN)
FANG HANGHANG (CN)

PCT/CN2021/093161

December 23, 2021

May 11, 2021

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SHANGHAI ELECTRIC WIND POWER GROUP CO LTD (CN)

H02P9/00; H02J3/38; H02P101/15

CN111711389A	2020-09-25
CN201774451U	2011-03-23
US20200067400A1	2020-02-27
JP2005042632A	2005-02-17
CN102324754A	2012-01-18
CN105429358A	2016-03-23

BEIJING BESTIPR INTELLECTUAL PROPERTY LAW CORPORATION (CN)

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