Title:
POWER SUPPLY APPARATUS FOR SUB-MODULE OF MMC
Document Type and Number:
WIPO Patent Application WO/2016/208894
Kind Code:
A1
Abstract:
The present invention relates to a power supply apparatus for a sub-module of a Modular Multilevel Converter (MMC) that stably supplies power to a sub-module of the MMC connected to a high-voltage direct current (HVDC) system. The power supply apparatus for a sub-module of an MMC according to the present invention, in a power supply apparatus for providing power to a sub module of an MMC, comprises: a relay unit that is installed between P-N bus bars of the MMC and that includes a Form B contact switch; a resistor that is connected to the relay unit in series; a TVS diode that is connected to the resistor in series; a Zener diode that is connected to the TVS diode in series; a transformer for transmitting the input voltage of the P-N bus bars (primary) to secondary voltage; a semi-conductor switch for switching a flow of current that is supplied to the transformer; a control unit for turning on the semi-conductor switch such that current flows to the transformer if a clamping voltage of the Zener diode is input; a relay operation unit for receiving a secondary output voltage of the transformer, and for operating the Form B contact switch of the relay unit; and a circuit interruption unit that is connected to the relay unit in series and that interrupts a circuit if current flowing through the Form B contact switch of the relay unit is larger than a preset reference current, or if heat is generated due to the current.
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Inventors:
BAEK YO HAN (KR)
Application Number:
PCT/KR2016/006219
Publication Date:
December 29, 2016
Filing Date:
June 10, 2016
Export Citation:
Assignee:
HYOSUNG CORP (KR)
International Classes:
H02M1/084; H02M7/12
Foreign References:
| JPH0777513B2 | 1995-08-16 | |||
| JP2001238465A | 2001-08-31 | |||
| JP2014180110A | 2014-09-25 | |||
| US20140028266A1 | 2014-01-30 | |||
| KR20140022374A | 2014-02-24 |
Attorney, Agent or Firm:
NAMCHON PATENT AND LAW FIRM (KR)
특허법인 남촌 (KR)
특허법인 남촌 (KR)
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