Title:
METHOD AND APPARATUS FOR CONTROLLING THREE-PHASE FOUR-BRIDGE-ARM AUXILIARY CONVERTER
Document Type and Number:
WIPO Patent Application WO/2023/066407
Kind Code:
A1
Abstract:
Disclosed in the present application are a method and apparatus for controlling a three-phase four-bridge-arm auxiliary converter. The control method comprises: a voltage collection step, involving: collecting a three-phase output voltage; a first compensation result acquisition step, involving: obtaining a positive-sequence component and a negative-sequence component of the three-phase output voltage by means of positive and negative synchronous rotation coordinate transformation and according to the three-phase output voltage, and performing closed-loop controlling on the positive-sequence component and the negative-sequence component, so as to obtain a positive-sequence component compensation result and a negative-sequence component compensation result; a second compensation result acquisition step, involving: obtaining a zero-sequence voltage component of the three-phase output voltage by means of a symmetrical component method and according to the three-phase output voltage, and performing feedback compensation on the zero-sequence voltage component, so as to obtain a zero-sequence component compensation result; and a three-phase output voltage balance step, involving: performing three-dimensional space rotation vector modulation according to the positive-sequence component compensation result, the negative-sequence component compensation result and the zero-sequence component compensation result, so as to obtain a control pulse, and applying the control pulse to a bridge arm of an inverter unit, so as to obtain a balanced three-phase output voltage.
Inventors:
LI JIAOSONG (CN)
ZENG FANFEI (CN)
LIN XIANQI (CN)
ZHOU SHUANGLEI (CN)
WANG LEI (CN)
ZENG FANFEI (CN)
LIN XIANQI (CN)
ZHOU SHUANGLEI (CN)
WANG LEI (CN)
Application Number:
PCT/CN2022/131673
Publication Date:
April 27, 2023
Filing Date:
November 14, 2022
Export Citation:
Assignee:
CRRC QINGDAO SIFANG ROLLING STOCK RES INST CO LTD (CN)
International Classes:
H02M7/5387; H02M1/088; H02M3/335
Foreign References:
| CN114826009A | 2022-07-29 | |||
| CN104201923A | 2014-12-10 | |||
| CN106301053A | 2017-01-04 | |||
| CN106685252A | 2017-05-17 | |||
| CN107733273A | 2018-02-23 | |||
| CN111371106A | 2020-07-03 |
Attorney, Agent or Firm:
QINGDAO LAWSCI INTELLECTUAL PROPERTY CO., LTD. (CN)
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