Abstract
This paper describes the design and field application of a high-efficiency single-phase AC/DC converter that is suitable for distribution lines. First, an appropriate AC/DC converter was designed in consideration of the environment of the application system. In order to ensure high efficiency and high reliability, we designed an optimum switching element and capacitor suitable for the converter, and the protection element of the AC/DC converter was designed based on these elements. The control function for the power converter suitable for an LVDC distribution system is proposed for highly reliable operation. The AC/DC converter was manufactured based on the design and its performance was verified during application in an actual low-voltage DC (LVDC) distribution grid through tests at the demonstration site. The application to a DC distribution system in an actual grid is very rare and it is expected that it will contribute to the expansion of LVDC distribution.
Highlights
Low-voltage DC (LVDC) distribution is being considered globally to replace AC distribution in order to provide a stable power supply for digital consumer electronics and to improve network efficiency following the interconnection of renewable energy sources
This paper focuses on the design, manufacturing, and demonstration of AC/DC power converters for converting high-voltage AC systems in a mountainous area, which come into frequent contact with trees, to an LVDC distribution system [3,4]
This paper presents the design, manufacturing, and demonstration of the SiC MOSFET-based bi-directional AC/DC power converter for LVDC distribution
Summary
Low-voltage DC (LVDC) distribution is being considered globally to replace AC distribution in order to provide a stable power supply for digital consumer electronics and to improve network efficiency following the interconnection of renewable energy sources. Many studies on AC/DC converters that connect with existing high-voltage AC systems are in development [2]. This paper focuses on the design, manufacturing, and demonstration of AC/DC power converters for converting high-voltage AC systems in a mountainous area, which come into frequent contact with trees, to an LVDC distribution system [3,4]. The capacity of the power converter is chosen by analyzing the load of the system, its switching elements, protection devices, and switching frequencies are chosen to ensure stable operation and high efficiency. In order to realize the high-efficiency power converter, the AC/DC converter applies
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