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:
Nov. 03, 2020
Filed:
Aug. 13, 2018
Energypartners Co., Ltd., Seoul, KR;
Young Cheol Shin, Seoul, KR;
Young Cheol Shin, Seoul, KR;
ENERGYPARTNERS CO., LTD., Seoul, KR;
Other;
Abstract
A grid-connected inverter system having a seamless switching function. An inverter converts DC power into AC power. A breaker is connected between the inverter, a grid, and a load to switch between a grid-connected operation and an independent operation. A filter converts an output of the inverter into a sine wave. A controller operates the inverter in a current control mode or a voltage control mode. The controller operates the inverter in the current control mode for a period of time longer than a turn-off time of the breaker when an abnormality in the grid is detected, and operates the inverter in the voltage control mode when the grid is disconnected from the load due to turn-off of the breaker.