Title:
CONTROL METHOD FOR VARIABLE FREQUENCY TRANSFORMER FAULT RIDE THROUGH CIRCUIT AND RELATED CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2019/119667
Kind Code:
A1
Abstract:
Disclosed by the present application are a variable frequency transformer fault ride through circuit and a control method therefor, comprising: pre-processing collected grid voltage, stator interface voltage and rotor interface voltage to obtain a stator voltage direct component and a rotor voltage direct component, and obtaining a first grid voltage frequency and a second grid voltage frequency by means of digital phase-locked loop detection processing; performing reference voltage calculation processing on the stator voltage direct component, the rotor voltage direct component, the first grid voltage frequency, and the second grid voltage frequency to obtain voltage reference values of a first pulse-width modulation (PWM) converter and a second PWM converter; performing control signal acquisition processing on the voltage reference values to obtain a switching signal for controlling the first PWM converter and the second PWM converter. By means of performing voltage compensation when a grid voltage experiences an asymmetrical fault, the grid voltage asymmetrical fault may be resolved, thus preventing the voltage asymmetrical fault from continuing to spread.
Inventors:
CHEN SIZHE (CN)
LU JIAHAO (CN)
ZHANG GUIDONG (CN)
YE YUANMAO (CN)
ZHANG YUN (CN)
ZHANG MIAO (CN)
LU JIAHAO (CN)
ZHANG GUIDONG (CN)
YE YUANMAO (CN)
ZHANG YUN (CN)
ZHANG MIAO (CN)
Application Number:
PCT/CN2018/080591
Publication Date:
June 27, 2019
Filing Date:
March 27, 2018
Export Citation:
Assignee:
UNIV GUANGDONG TECHNOLOGY (CN)
International Classes:
H02J3/02
Foreign References:
| CN102624026A | 2012-08-01 | |||
| CN103560520A | 2014-02-05 | |||
| CN104009497A | 2014-08-27 | |||
| CN105826924A | 2016-08-03 | |||
| EP1107439A2 | 2001-06-13 | |||
| JP4648789B2 | 2011-03-09 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
Download PDF: