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:
Sep. 04, 2018
Filed:
Jun. 11, 2015
Shibashis Bhowmik, Charlotte, NC (US);
Iman Mazhari, Charlotte, NC (US);
Babak Parkhideh, Charlotte, NC (US);
Shibashis Bhowmik, Charlotte, NC (US);
Iman Mazhari, Charlotte, NC (US);
Babak Parkhideh, Charlotte, NC (US);
SINEWATTS, INC., Charlotte, NC (US);
THE UNIVERSITY OF NORTH CAROLINA AT CHARLOTTE, Charlotte, NC (US);
Abstract
A method for detecting and preventing islanding includes issuing a command to an inverter connected to a power source, where the inverter is coupled to a power grid and supplies power to the power grid, the command causes a frequency of a waveform output by the inverter to vary, and the frequency of the waveform output by the inverter is a command frequency, determining that a amount of change of the command frequency is a constant value for a predetermined amount of time, removing the power supplied by the inverter from the power grid, and determining whether the power grid is valid.