Title:
INVERTER, PARALLEL INVERTER SYSTEM, AND METHOD FOR CONTROLLING INVERTER
Document Type and Number:
WIPO Patent Application WO/2022/185614
Kind Code:
A1
Abstract:
The present invention is an inverter that is connected in parallel to an AC circuit to which an AC power source is connected, the inverter providing an independent output, wherein the inverter comprises: a power conversion unit that converts DC power to AC power and supplies the AC power to the AC circuit; a voltage sensor that detects the AC voltage of the AC circuit; and a control unit that controls the power conversion unit. The control unit adds a frequency feedback process for applying a frequency correction value to an operation for calculating a frequency detection value in a phase synchronization loop that is executed on the basis of the AC voltage, the frequency correction value being obtained by performing proportional integration on the result of comparing the previous value of the frequency detection value with a frequency reference value.
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Inventors:
AYAI NAOKI (JP)
Application Number:
PCT/JP2021/040360
Publication Date:
September 09, 2022
Filing Date:
November 02, 2021
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
H02M7/48; H02M7/493
Foreign References:
| JP2015100224A | 2015-05-28 | |||
| JP2017225214A | 2017-12-21 | |||
| JP2010161901A | 2010-07-22 |
Attorney, Agent or Firm:
SUNCREST PATENT AND TRADEMARK ATTORNEYS (JP)
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