The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 17, 2018
Filed:
Dec. 15, 2015
Applicant:
Sungrow Power Supply Co., Ltd., Hefei, Anhui, CN;
Inventors:
Assignee:
SUNGROW POWER SUPPLY CO., LTD., Anhui, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 7/44 (2006.01); H02J 3/38 (2006.01); H02M 7/493 (2007.01); H02S 40/32 (2014.01); H02M 1/12 (2006.01);
U.S. Cl.
CPC ...
H02J 3/383 (2013.01); H02M 7/44 (2013.01); H02M 7/493 (2013.01); H02S 40/32 (2014.12); H02M 2001/123 (2013.01); Y02E 10/563 (2013.01);
Abstract
A control method and apparatus for photovoltaic inverters connected in parallel at an AC side are provided and the method includes the following steps: detecting a first direct voltage of the first inverter and a second direct voltage of the second inverter; obtaining a difference between the first direct voltage and the second direct voltage; and adjusting the direct voltages of the inverters to control the difference to be within a predetermined range and control a common-mode voltage in the common-mode loop to be within a predetermined common-mode voltage range.