Title:
SMALL-CAPACITANCE POWER CONVERTER, AND GRID-SIDE ELECTRICAL-ENERGY QUALITY CONTROL WORKING METHOD AND BUS VOLTAGE SUPPRESSION CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/217623
Kind Code:
A1
Abstract:
Disclosed are a small-capacitance power converter, and a grid-side electrical-energy quality control working method and a bus voltage suppression control method therefor. A power decoupling circuit is connected in series between a conventional diode rectifier and a direct-current bus of a driving system. Two energy transmission channels are constructed between a grid and the direct-current bus, such that the flexibility of pulsating power processing of the grid is significantly improved. A controller of the active power decoupling circuit is constructed on the basis of a virtual bus voltage concept to quickly and accurately control an instantaneous voltage change of a decoupling capacitor according to operating conditions of the driving system, such that bus voltage pulsations under different operating conditions are significantly reduced, and high-performance operation of a motor driving system under steady and dynamic operating conditions is implemented. Grid electrical-energy quality control and direct-current bus voltage pulsation suppression, based on a small-capacitance active power decoupling circuit, of the driving system are decoupled from each other, such that the complexity of a system controller is effectively reduced, and a harmonic standard related to grid electrical-energy quality is met while implementing the high-performance operation of a motor.
Inventors:
ZHANG CHAO (CN)
XU LEI (CN)
ZHU XIAOYONG (CN)
DU YI (CN)
ZHANG LI (CN)
QIN YUANYUAN (CN)
XU LEI (CN)
ZHU XIAOYONG (CN)
DU YI (CN)
ZHANG LI (CN)
QIN YUANYUAN (CN)
Application Number:
PCT/CN2021/088057
Publication Date:
October 20, 2022
Filing Date:
April 19, 2021
Export Citation:
Assignee:
UNIV JIANGSU (CN)
International Classes:
H02M1/34; H02M5/458; H02P25/16
Foreign References:
| CN109067292A | 2018-12-21 | |||
| CN106602851A | 2017-04-26 | |||
| CN101237187A | 2008-08-06 | |||
| CN104811075A | 2015-07-29 | |||
| US10523114B1 | 2019-12-31 |
Attorney, Agent or Firm:
NANJING DOYES INTELLECTUAL PROPERTY CO., LTD. (CN)
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