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This letter proposes a new scheme of smooth operation transition for the stand-alone power system which is composed of engine generator and battery energy storage system (BESS) with photo voltaic panels. The proposed scheme offers smooth operation transition of BESS controller from the current control to the voltage control and vice versa. The feasibility of proposed scheme was verified through experiments...
Modular Multi-level Converter (MMC) has been widely researched in order to apply it for the back-to-back (BTB) high voltage direct current (HVDC) system. This paper proposes a new pre-charging scheme for the sub-module capacitors of MMC that is operated in nearest level control (NLC) modulation. The proposed scheme does not require any additional circuit or pulse width modulation (PWM) technique....
This paper proposes a new seamless operation scheme for a stand-alone power system, which has a battery energy storage system (BESS), photo voltaic (PV) panels, and an engine generator (EG) to supply electric power to the customers in remote islands. The proposed scheme offers smooth operation change of the BESS from the current control to the voltage control or vice versa when the EG is connected...
This paper proposes an operational improvement of MMC (Modular Multilevel Converter) with redundancy SMs (sub-modules) by a new scheme of NLC (Nearest Level Control), which can offer reduction of voltage harmonics and switching loss. The feasibility of proposed scheme was verified through computer simulations with PSCAD/EMTDC software. Based on simulation results, a hardware prototype of 10kVA, DC-1000V...
The DMW(Data-Centric Middleware) in CPS to support for high reliable and Autonomous Controlling Software is the platform that distributes a Publish/Subscribe based real-time data and supply a different QoS(Quality of Service). This paper deals with the DTB(Data Transport Block) in DMW that is to supply high reliable and QoS.
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