Soft-Switched Converter with Renewable Energy Source for Smart Grid

Research Project

Project/Area Number	25420250
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Research Field	Power engineering/Power conversion/Electric machinery
Research Institution	Gifu University
Principal Investigator	ISHIKAWA Hiroki 岐阜大学, 工学部, 准教授 (90273119)
Project Period (FY)	2013-04-01 – 2016-03-31
Project Status	Completed (Fiscal Year 2015)
Budget Amount *help	¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000) Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000) Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000) Fiscal Year 2013: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords	ソフトスイッチング / MPPT制御 / 充電制御 / 並列多重インバータ / EDLC / 高周波スイッチング / 並列多重電流形インバータ
Outline of Final Research Achievements	In the project, a novel power conversion system for smart grid application was proposed, and the validity and effects of the system were demonstrated by simulation and experiment. The system consists of renewable energy source as a power source, a soft-switched buck chopper, electrical double layer capacitors (EDLCs) as a energy storage, and interconnected parallel current source inverters (parallel-CSIs). The soft-switched chopper realized the maximum power point tracking of the photovoltaic generation system and suitable energy charge to EDLCs. The parallel-CSIs also realized reactive power control for the suppression of the increased distribution line voltage caused by reverse power flow.