| 摘要 |
PROBLEM TO BE SOLVED: To stabilize the voltage of a DC bus while securing autonomous control of a power converter connected to the DC bus in a DC system supplying DC power.SOLUTION: A DC system includes a power system 50, a photovoltaic power generation system 60 as a DC power source, and a power storage device 100 coupled between the power system 50 and the photovoltaic power generation system 60. The power storage device 100 includes a DC bus 30 for transmitting DC power, a connection terminal 40 for electrically connecting the photovoltaic power generation system 60 to the DC bus 30, a bidirectional DC/AC converter 10 for bidirectionally converting power between the DC bus 30 and the power system 50, and a storage battery 20 which is directly connected to the DC bus 30 and outputs a power supply voltage to the DC bus 30. |
