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Title:
CONVERTER VALVE-LEVEL FAULT LOCATING METHOD AND SYSTEM BASED ON INTER-VALVE TRANSVERSE AND LONGITUDINAL STATE DIFFERENCES
Document Type and Number:
WIPO Patent Application WO/2023/197539
Kind Code:
A1
Abstract:
A converter valve-level fault locating method and system based on inter-valve transverse and longitudinal state differences. The method comprises: collecting current data of a converter (S101); on the basis of the current data, calculating a time width of each valve conduction state, an alternating-current conduction width and a direct-current conduction width (S102); according to the alternating-current conduction width and the direct-current conduction width, constructing transverse and longitudinal timing sequence features on a converter circuit structure (S103); comparing the time width of each valve conduction state with a time width of a normal valve conduction state, and outputting each valve state signal (S104); and according to the time width of each valve conduction state, the alternating-current conduction width, the direct-current conduction width, the transverse and longitudinal timing sequence features, each valve state signal and the current data, realizing converter valve-level fault locating (S105). On the basis of current timing sequence features, the differences between conduction widths of an alternating current in a transverse direction and a longitudinal direction and the differences between conduction widths of a direct current in the transverse direction and the longitudinal direction are constructed, thereby realizing the accurate locating of a converter valve-level fault.

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Inventors:
LI XIAOHUA (CN)
YIN SHANSHAN (CN)
LI HAO (CN)
HE YUCHEN (CN)
ZHENG YIXIN (CN)
Application Number:
PCT/CN2022/123885
Publication Date:
October 19, 2023
Filing Date:
October 08, 2022
Export Citation:
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Assignee:
UNIV SOUTH CHINA TECH (CN)
International Classes:
G01R31/327; G01R31/00
Domestic Patent References:
WO2016020521A12016-02-11
Foreign References:
CN114879023A2022-08-09
CN111157827A2020-05-15
CN111239471A2020-06-05
CN112630592A2021-04-09
CN105515472A2016-04-20
CN104267288A2015-01-07
Attorney, Agent or Firm:
HUAXUE IP AGENCY CO., LTD. (CN)
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