发明名称 |
Electricity storage system |
摘要 |
In a system having a plurality of storage batteries equipped with bidirectional invertors respectively, the present invention allows a new storage battery to be easily attached later with a structure in which an inverter control is performed according to a value detected in another storage battery. An electricity storage system of the present invention includes: a current detector (22) that detects a charging/discharging current or charging/discharging power of a first electricity storage system (10) directly or indirectly; a second bidirectional inverter (23) that performs power conversion when charge/discharge of a second storage battery (21) is performed from/to a power system (30); and a control device that controls driving the second bidirectional inverter (23) so as to compensate for charge/discharge of a first storage battery (11) in response to a detected value of the current detector (22). |
申请公布号 |
US9595842(B2) |
申请公布日期 |
2017.03.14 |
申请号 |
US201214652606 |
申请日期 |
2012.12.20 |
申请人 |
Hitachi, Ltd. |
发明人 |
Takeda Kenji |
分类号 |
H02J7/00;G01R31/36;H01M10/44;H02J3/32 |
主分类号 |
H02J7/00 |
代理机构 |
Crowell & Moring LLP |
代理人 |
Crowell & Moring LLP |
主权项 |
1. An electricity storage system comprising:
a state detection device that detects directly or indirectly a charging/discharging current or charging/discharging power of another electricity storage system connected to a power system; a bidirectional inverter that performs power conversion when charge/discharge of a storage battery managed by the electricity storage system is performed from/to the power system; and a control device that controls driving the bidirectional inverter so as to compensate for charging/discharging the other electricity storage system in response to the charging/discharging current or the charging/discharging power detected by the state detection device, wherein the state detection device is installed on wiring at a position closer to the power system than a connection point between an external load that generates or consumes power to/from the power system and the other electricity storage system, and the control device calculates an average value of current or power detected by the state detection device in a predetermined cycle, and controls driving the bidirectional inverter so as to cancel a difference if an absolute value of the difference between the current or the power and the average value exceeds a predetermined threshold. |
地址 |
Tokyo JP |