1E25 Experimental Analysis of Power Supply System Using Renewable Energy for DC Electrified Railway(Environment and Energy)

抄録

Recently, many railway companies have introduced a number of applications of renewable energy such as solar power, wind power. Such energy is converted to AC commercial power and used for railway grids or commercial power grids. However, renewable energy cannot be used for railway vehicles directly because such energy has a tendency to fluctuate according to meteorological conditions. Therefore, it is necessary to design a stable power supply system to make renewable energy usable. Recent years have witnessed an advance in an energy storage unit technology. In this study, we propose a new power supply system using renewable energy and an energy storage system for DC electrified railways. We have introduced "renewable energy modeling system" for this study. The rectifier part converts from AC 210V to DC 283V, and the chopper part converts from DC 283 V to the DC terminal voltage of the energy storage unit. Renewable power can be simulated by boosting terminal voltage. The boosting range is controlled by the "renewable energy model control system". The control system can simulate various characteristics of renewable energy power. We have conducted experimental tests of the system by using actual energy storage systems with lithium-ion capacitors, the renewable energy modeling system, and a test line. This paper outlines the control methods of the system, and the results of comparative tests by three control methods.