Title:
METHOD FOR DIAGNOSING SUB-MODULE STATE DURING INITIAL CHARGE OF MMC CONVERTER
Document Type and Number:
WIPO Patent Application WO/2019/132428
Kind Code:
A1
Abstract:
The present invention relates to a method for diagnosing a sub-module state during initial charge of an MMC converter, the method comprising the steps in which: a higher controller identifies a static state of an MMC converter; when the MMC converter is in a static state, the higher controller causes an AC voltage to be supplied from an AC side to N sub-modules in the MMC converter; a capacitor in each of the sub-modules is charged with an initial charge voltage by means of the supplied AC voltage; sub-module controllers identify whether each of sub-modules is currently in a fault state, and transmit a fault signal to the higher controller when any sub-module is in a fault state; voltage detection units of the sub-modules detect the initial charge voltage with which the capacitors are charged, and transmit the detected initial charge voltage to the sub-module controllers; the sub-module controllers transfer the received initial charge voltage to the higher controller; and the higher controller diagnoses a state of each of the sub-modules using the initial charge voltage of each of the sub-modules and whether the fault signal is received from any sub-module controller.
Inventors:
HONG JUNG WON (KR)
JUNG HONG JU (KR)
YOO HYUN HO (KR)
LEE JOO YEON (KR)
JUNG HONG JU (KR)
YOO HYUN HO (KR)
LEE JOO YEON (KR)
Application Number:
PCT/KR2018/016394
Publication Date:
July 04, 2019
Filing Date:
December 20, 2018
Export Citation:
Assignee:
HYOSUNG HEAVY IND CORP (KR)
International Classes:
G01R31/40; G01R31/26; H02M7/483
Foreign References:
| KR101521105B1 | 2015-05-19 | |||
| KR20170090911A | 2017-08-08 | |||
| JP2015095926A | 2015-05-18 | |||
| KR101758301B1 | 2017-07-14 | |||
| KR101668431B1 | 2016-10-24 |
Attorney, Agent or Firm:
NAMCHON PATENT AND LAW FIRM (KR)
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