Korea Institute of Energy Research

Yujin Song

Suyong Chae

Sukin Park

Jongbok Baek

ILoun Lee

Seashung Oh

Su Yong Chae

Gyu Duk Kim

Sea Seung Oh

Seung Weon Yu

Yoon Dong Sung

Seaseung Oh

Yoondong Sung

Hakguen Jeong

Subin Han

Moses Kang

Su Bin Han

The present disclosure related to a mobile micro-grid unit and a micro-grid system. An aspect of the present embodiment provides a mobile micro-grid system including: two or more movable micro-grid units configured to receive energy from an energy source so as to supply the energy to an internal power line and configured to provide energy of the internal power line to loads; and external power lines configured to be connected between the micro-grid units, wherein the external power lines are connected to each other through the internal power lines so as to form a closed-loop type ring bus.

Mobile micro-grid unit and micro-grid system

The present disclosure relates to frequency control of power conversion modules for decreasing THD (Total Harmonic Distortion) in a power conversion device in which a plurality of power conversion modules operate in parallel. In one aspect of the present disclosure, an embodiment provides a power conversion device comprising a plurality of power conversion modules being connected in parallel to receive input power and provide output AC power, and a frequency controller controlling each operating frequency of the plurality of power conversion modules, wherein, the frequency controller may include a function as a first frequency regulating step for regulating each operating frequency of the plurality of power conversion modules, so that the operating frequencies of the plurality of power conversion modules have a specific relationship with each other.

Control of power conversion device for decreasing total harmonic distortion

The present disclosure provides a charging system including: at least two charging devices including at least two output units configured to supply connected automobiles with charging power, a first bus electrically connected to the output units and configured to transfer charging power to the output units, and a power processing unit configured to process power, which is supplied from a power source, using a first capacity and supply the first bus with the processed power; and a second bus configured to connect a first bus of a first charging device and a first bus of a second charging device, wherein, when a total capacity of charging power supplied to automobiles connected to the first charging device exceeds the first capacity, a part or all of lacking capacity is supplied via the second bus.

Power-sharing charging system, charging device, and method for controlling the same

Disclosed is a hybrid dc-dc converter. The hybrid dc-dc converter includes: a pair of transformers configured to magnetically couple a primary side to a secondary side, a full-bridge converter including four switches constituting a full-bridge inverter circuit and a first transformer, and an LLC resonant converter including a resonant inductor, a resonant capacitor, and a second transformer, which constitute an LLC resonant circuit, wherein an output of the full-bridge converter and an output of the LLC resonant converter are connected to each other in series at the secondary side.

Hybrid DC-DC converter with LLC converter and full-bridge converter

Disclosed is technology regarding a system and a method for power conversion, particularly technology for converting power, which is supplied from a plurality of power supply sources, using a plurality of power conversion modules. A plurality of power conversion modules, which can process all of various types of supplied power, are used to convert power according to the type of supplied power. An intermediate connection unit, which can selectively connect the power supply sources and the power conversion modules, is used so that, when one of the power conversion modules has a problem, another power conversion module is used instead to guarantee stable power supply. This construction makes the power processing path flexible and enhances system stability because, even if one of the power conversion modules malfunctions, power conversion can continue through another path.

System and method for converting electric power, and apparatus and method for controlling the system

Disclosed is a technology related to an apparatus for controlling or analyzing a power converting module, and more particularly, to a technology for improving imbalance of power quantities processed by a plurality of power converting modules. Relative power quantities processed by the modules are detected through a common circuit element installed in an input terminal or an output terminal shared by the plurality of modules, without detecting information acquired through current or voltage sensors individually installed in respective modules, and control values of the respective modules may be compensated for through the detected relative power quantities or may be output in a form where a user can easily identify them.

Apparatus and method for controlling a plurality of power converting modules and apparatus and method for analyzing power quantity imbalance

Growing community of inventors

Daejeon, South Korea

Yujin Song