Title:
PARALLEL OPERATION CONTROLLER FOR AC OUTPUT CONVERTER
Document Type and Number:
Japanese Patent JP2674402
Kind Code:
B2
Abstract:
PURPOSE: To divide a current quickly with good balance in a power supply system comprising a plurality of parallel connected instantaneous control type AC output converters which is operated in parallel with a common load.
CONSTITUTION: A transversal current ΔI1 flowing between converters is detected through a current detecting circuit 406 and delivered to a vertual impedance circuit 405 for limiting transversal current where a value Z×ΔI1 is determined. A signal representing the value Z×ΔI1 is then subtracted, by means of a subtractor 504, from a bus voltage command value V* to produce a signal V*1(=V*-Z×ΔI1) which is employed as a command value for an instantaneous voltage control circuit 403. On the other hand, a converter 411 takes out components substantially dependent on the output phase difference between converters from the transversal current ΔI1 and varies frequency reference signal outputted from a voltage controlled oscillator 412 so that the traversal current is eliminated.
Inventors:
Nobuo Sashida
Yamamoto Yushin
Yamamoto Yushin
Application Number:
JP34606691A
Publication Date:
November 12, 1997
Filing Date:
December 27, 1991
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H02J3/46; H02M7/493; (IPC1-7): H02M7/48; H02J3/46
Domestic Patent References:
| JP63121474A | ||||
| JP1303060A | ||||
| JP62147962A | ||||
| JP5336137B2 |
Attorney, Agent or Firm:
Kaneo Miyata (3 outside)