Title:
ACTIVE COMMUTATED HYBRID CONVERTER TOPOLOGY STRUCTURE AND CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/160930
Kind Code:
A1
Abstract:
The present application discloses an active commutated hybrid converter topology structure and a control method therefor. Said topology structure comprises: a three-phase six-bridge arm circuit, wherein each phase bridge arm circuit of the three-phase six-bridge arm circuit comprises an upper bridge arm and a lower bridge arm, and a thyristor valve is provided on each of the upper bridge arm and the lower bridge arm; an upper bridge arm auxiliary valve, a first end thereof being connected to a cathode end of the thyristor valve of each phase upper bridge arm; a lower bridge arm auxiliary valve, a first end thereof being connected to an anode end of the thyristor valve of each phase lower bridge arm; a controllable switch module, a first end thereof being connected to a second end of the upper bridge arm auxiliary valve and a second end of the lower bridge arm auxiliary valve respectively; and a selection unit, comprising two connection ends and at least two selection ends, wherein the connection ends are connected to a second end of the controllable switch module, a first selection end is connected to an anode end of the thyristor valve of the upper bridge arm, and a second selection end is connected to a cathode end of the thyristor valve of the lower bridge arm. By implementing the present application, the occurrence of commutation failure is avoided, and the stability and safety of the operation of grid are ensured.
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Inventors:
YANG JUN (CN)
WEI XIAOGUANG (CN)
LI TINGTING (CN)
DING XIAO (CN)
ZHANG JUANJUAN (CN)
WEI XIAOGUANG (CN)
LI TINGTING (CN)
DING XIAO (CN)
ZHANG JUANJUAN (CN)
Application Number:
PCT/CN2021/135127
Publication Date:
August 04, 2022
Filing Date:
December 02, 2021
Export Citation:
Assignee:
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD (CN)
International Classes:
H02M7/155; H02M1/32; H02M7/162; H02M7/521
Foreign References:
| CN112803796A | 2021-05-14 | |||
| CN111600497A | 2020-08-28 | |||
| CN109217347A | 2019-01-15 | |||
| CN106786349A | 2017-05-31 | |||
| US20200244096A1 | 2020-07-30 |
Other References:
HOU LINGXI, YINGDONG WEI, SHUQING ZHANG, QIRONG JIANG, YINGDUO HAN: "Series Voltage Commutated Converter to Suppress HVDC Commutation Failure and Its Control Strategy", PROCEEDINGS OF THE CSEE, vol. 38, 20 November 2018 (2018-11-20), pages 6481 - 6491, XP055861460, DOI: 10.13334/j.0258-8013.pcsee.180095
YING XUE ET AL.: "Commutation Failure Elimination of LCC HVDC Systems Using Thyristor-Based Controllable Capacitors", IEEE TRANSACTIONS ON POWER DELIVERY, vol. 33, no. 3, 30 June 2018 (2018-06-30), XP011680404, ISSN: 0885-8977, DOI: 10.1109/TPWRD.2017.2776867
YING XUE ET AL.: "Commutation Failure Elimination of LCC HVDC Systems Using Thyristor-Based Controllable Capacitors", IEEE TRANSACTIONS ON POWER DELIVERY, vol. 33, no. 3, 30 June 2018 (2018-06-30), XP011680404, ISSN: 0885-8977, DOI: 10.1109/TPWRD.2017.2776867
Attorney, Agent or Firm:
CHINA PAT INTELLECTUAL PROPERTY OFFICE (CN)
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