Patents Assigned to KOREA ELECTRICAL ENGINEERING & SCIENCE RESEARCH INSTITUTE
  • Three-level photovoltaic inverter configured for asymmetric control of DC-link voltages for separate MPPT driving
    Patent number: 9209707
    Abstract: A three-level inverter having two direct current (DC)-links for converting DC voltages generated in a plurality of photovoltaic (PV) modules into alternating current (AC) voltages, wherein one end of a first DC-link of the two DC-links is connected to a first potential point at which a first potential is generated in the plurality of PV modules, and one end of a second DC-link of the two DC-links is connected to a second potential point at which a second potential that is lower than the first potential is generated in the plurality of PV modules, and both the other end of the first DC-link and the other end of the second DC-link are connected to a third potential point at which a third potential having a medium level between the first potential and the second potential is generated in the plurality of PV modules.
    Type: Grant
    Filed: January 24, 2013
    Date of Patent: December 8, 2015
    Assignees: LG ELECTRONICS INC., KOREA ELECTRICAL ENGINEERING & SCIENCE RESEARCH INSTITUTE
    Inventors: Yong-Soon Park, Seung-Ki Sul, Chun-Ho Lim, Seong-Hun Lee, Ki-Sung Lee
  • THREE-LEVEL PHOTOVOLTAIC INVERTER CONFIGURED FOR ASYMMETRIC CONTROL OF DC-LINK VOLTAGES FOR SEPARATE MPPT DRIVING
    Publication number: 20140097687
    Abstract: A three-level inverter having two direct current (DC)-links for converting DC voltages generated in a plurality of photovoltaic (PV) modules into alternating current (AC) voltages, wherein one end of a first DC-link of the two DC-links is connected to a first potential point at which a first potential is generated in the plurality of PV modules, and one end of a second DC-link of the two DC-links is connected to a second potential point at which a second potential that is lower than the first potential is generated in the plurality of PV modules, and both the other end of the first DC-link and the other end of the second DC-link are connected to a third potential point at which a third potential having a medium level between the first potential and the second potential is generated in the plurality of PV modules.
    Type: Application
    Filed: January 24, 2013
    Publication date: April 10, 2014
    Applicants: KOREA ELECTRICAL ENGINEERING & SCIENCE RESEARCH INSTITUTE, LG UPLUS CORP.
    Inventors: Yong-Soon PARK, Seung-Ki SUL, Chun-Ho LIM, Seong-Hun LEE, Ki-Sung LEE