System and method for islanding detection and prevention in distributed generation

Patent · 04 September 2018

OSTI ID:1472075

Bhowmik, Shibashis; Mazhari, Iman; Parkhideh, Babak

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.

• Research Organization: SINEWATTS, INC., Charlotte, NC (United States); THE UNIVERSITY OF NORTH CAROLINA AT CHARLOTTE, Charlotte, NC (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: EE0006459
• Assignee: SINEWATTS, INC. (Charlotte, NC); THE UNIVERSITY OF NORTH CAROLINA AT CHARLOTTE (Charlotte, NC)
• Patent Number(s): 10,069,304
• Application Number: 14/737,468
• OSTI ID: 1472075
• Country of Publication: United States
• Language: English