배성우 교수

This paper presents a spatial and temporal model of electric vehicle charging demand for a rapid charging station located near a highway exit. Most previous studies have assumed a fixed charging location and fixed charging time during the off-peak hours for anticipating electric vehicle charging demand. Some other studies have based on limited charging scenarios at typical locations instead of a mathematical model. Therefore, from a distribution system perspective, electric vehicle charging dema

This paper presents a dynamic modeling and control strategy for a sustainable microgrid primarily powered by wind and solar energy. A current-source-interface multiple-input dc-dc converter is used to integrate the renewable energy sources to the main dc bus. Potential suitable applications range from a communication site or a residential area. A direct-driven permanent magnet synchronous wind generator is used with a variable speed control method whose strategy is to capture the maximum wind en

This paper presents a high-voltage bipolar rectangular pulse generator using a solid-state boosting front-end and an H-bridge output stage. The topology generates rectangular pulses with fast enough rise time and allows easy step-up input voltage. In addition, the circuit is able to adjust positive or negative pulsewidth, dead time between two pulses, and operating frequency. The topology can also be controlled to produce unipolar pulses and other pulse patterns without changing its configuratio

With the widespread use of electric vehicles, their charging power demand has increased and become a significant burden on power grids. The uncoordinated deployment of electric vehicle charging stations and the uncertainty surrounding charging behaviors can cause harmful impacts on power grids. The charging power demand during the fast charging process especially is severely fluctuating, because its charging duration is short and the rated power of the fast chargers is high. This paper presents

Background: Unbalanced cells in the battery caused by differences in cell compounds and initial charge capacities may reduce its capacity and exert on a bad influence on its safety and lifetime. Methods: This paper introduces comparisons on the different cell balancing methods for energy storage applications. This study first categorizes cell balancing circuits as passive or active cell balancing methods based on the usage of resistors. Then, this paper investigates the advantages and disadvanta

Photovoltaic modules require a maximum power point tracker in order to achieve maximum conversion efficiency when the maximum power point changes based on solar irradiance, temperature, cells age, and other factors. The need to track the maximum power point while combining multiple-input sources has stimulated research on maximum power point trackers for multiple input dc-dc converters. When compared to prior work, a multiple-input Cuk dc-dc converter seems to be an adequate choice when combinin

In order to implement reliable and flexible power management among energy sources, a decentralized power management approach for electrical power systems (EPSs) in the more electric aircraft (MEA) is studied. Considering the increased use of electrical power for various functions, the performance of MEA would be determined by the design and operation of the EPS. By using a virtual impedance that includes both a resistive term and an inductive term, autonomous power sharing is realized. Because o