Title:
ACTIVE COMMUTATION UNIT, FORCED COMMUTATION HYBRID CONVERTER TOPOLOGICAL STRUCTURE, AND METHOD
Document Type and Number:
WIPO Patent Application WO/2022/160929
Kind Code:
A1
Abstract:
Disclosed in the present invention are an active commutation unit, a forced commutation hybrid converter topological structure, and a method. The active commutation unit is disposed in a bridge arm circuit of a converter, has one end connected to a converter transformer and the other end connected to a direct-current bus, and comprises: a main branch provided with a thyristor valve, and an auxiliary branch arranged in parallel with the main branch; a first control valve and a second control valve are successively provided on the auxiliary branch, the first control valve has a unidirectional voltage output controllable turn-off function, and the second control valve has a forward current controllable turn-off function and a forward/reverse voltage blocking function. The forced commutation hybrid converter topological structure is connected to an alternating-current power grid by means of the converter transformer; the topological structure comprises a three-phase six-bridge arm circuit, each phase bridge arm comprises an upper bridge arm and a lower bridge arm, and at least one upper bridge arm or lower bridge arm is provided with the active commutation unit.
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Inventors:
GAO CHONG (CN)
HE ZHIYUAN (CN)
ZHANG JUANJUAN (CN)
WANG ZHIXIANG (CN)
LI TINGTING (CN)
HE ZHIYUAN (CN)
ZHANG JUANJUAN (CN)
WANG ZHIXIANG (CN)
LI TINGTING (CN)
Application Number:
PCT/CN2021/135027
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; H02M7/162
Foreign References:
| CN112803795A | 2021-05-14 | |||
| CN111600497A | 2020-08-28 | |||
| 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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