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1. (WO2013125425) POWER CONVERSION DEVICE AND DIRECT-CURRENT SYSTEM

Pub. No.:    WO/2013/125425    International Application No.:    PCT/JP2013/053464
Publication Date: Fri Aug 30 01:59:59 CEST 2013 International Filing Date: Fri Feb 15 00:59:59 CET 2013
IPC: H02J 7/34
H02J 3/38
Applicants: SHARP KABUSHIKI KAISHA
シャープ株式会社
Inventors: MATSUI, Ryoji
松井 亮二
Title: POWER CONVERSION DEVICE AND DIRECT-CURRENT SYSTEM
Abstract:
In a direct-current system in which an electrical storage device (3) is directly coupled to a direct-current bus (1), a bidirectional DC/AC converter (40) is equipped with: a power conversion unit that converts power in a bidirectional manner between the direct-current bus (1) and system power (42); a local-path current detection unit that detects local-path current that passes through the power conversion unit; a charging/discharging current detection unit that detects charging/discharging current of the electrical storage device (3); and a control unit that controls the power conversion unit. The control unit includes: a power conversion control means for controlling power conversion in the power conversion unit in such a way that the local-path current assumes a control target value; and an adjustment means for adjusting the control target value during execution of the power conversion control means, in such a way that the detection value for the charging/discharging current stays within a predetermined current range.