Title:
電力変換装置および電力変換システム
Document Type and Number:
Japanese Patent JP6926619
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To stabilize parallel operation by suppressing occurrence of cross current.SOLUTION: A power conversion device 1-1 comprises a DC to AC converter 20, voltage detector PT1, and control circuit 10. The control circuit 10 includes an average voltage calculation unit 1a, average voltage correction unit 1b, multiplier 1c, and voltage equalization control unit 1d. The voltage detector PT1 detects an output voltage of the DC to AC converter 20 and outputs a detection voltage Vout1. The average voltage calculation unit 1a averages detection voltages Vout1 to calculate an average voltage. The average voltage correction unit 1b calculates a correction factor for the average voltage for reducing reactive power of output power of the DC to AC converter 20. The multiplier 1c multiplies the average voltage by the correction factor to calculate an average voltage correction amount. The voltage equalization control unit 1d equalizes amplitude of the output voltage of the DC to AC converter 20 on the basis of the average voltage correction amount.SELECTED DRAWING: Figure 1
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Inventors:
Masashi Hoya
Hisashi Fujimoto
Sho Sato
Hisashi Fujimoto
Sho Sato
Application Number:
JP2017082010A
Publication Date:
August 25, 2021
Filing Date:
April 18, 2017
Export Citation:
Assignee:
Fuji Electric Co., Ltd.
International Classes:
H02M7/493; H02M7/48
Domestic Patent References:
| JP5015070A | ||||
| JP8223927A | ||||
| JP2014054120A | ||||
| JP1099477A |
Foreign References:
| US5257180 | ||||
| EP2706650A2 | ||||
| CN103684003A | ||||
| KR1020140034048A |
Attorney, Agent or Firm:
Fuso International Patent Office