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Title: System and method for islanding detection and prevention in distributed generation

Abstract

Various examples are directed to systems and methods for detecting an islanding condition at an inverter configured to couple a distributed generation system to an electrical grid network. A controller may determine a command frequency and a command frequency variation. The controller may determine that the command frequency variation indicates a potential islanding condition and send to the inverter an instruction to disconnect the distributed generation system from the electrical grid network. When the distributed generation system is disconnected from the electrical grid network, the controller may determine whether the grid network is valid.

Inventors:
; ;
Issue Date:
Research Org.:
Sinewatts, Inc., Charlotte, NC (United States); The University of North Carolina at Charlotte, Charlotte, NC (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1457413
Patent Number(s):
9997920
Application Number:
14/860,159
Assignee:
Sinewatts, Inc. (Charlotte, NC); The University of North Carolina at Charlotte (Charlotte, NC)
Patent Classifications (CPCs):
H - ELECTRICITY H02 - GENERATION H02J - CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
DOE Contract Number:  
EE0006459
Resource Type:
Patent
Resource Relation:
Patent File Date: 2015 Sep 21
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Bhowmik, Shibashis, Mazhari, Iman, and Parkhideh, Babak. System and method for islanding detection and prevention in distributed generation. United States: N. p., 2018. Web.
Bhowmik, Shibashis, Mazhari, Iman, & Parkhideh, Babak. System and method for islanding detection and prevention in distributed generation. United States.
Bhowmik, Shibashis, Mazhari, Iman, and Parkhideh, Babak. Tue . "System and method for islanding detection and prevention in distributed generation". United States. https://www.osti.gov/servlets/purl/1457413.
@article{osti_1457413,
title = {System and method for islanding detection and prevention in distributed generation},
author = {Bhowmik, Shibashis and Mazhari, Iman and Parkhideh, Babak},
abstractNote = {Various examples are directed to systems and methods for detecting an islanding condition at an inverter configured to couple a distributed generation system to an electrical grid network. A controller may determine a command frequency and a command frequency variation. The controller may determine that the command frequency variation indicates a potential islanding condition and send to the inverter an instruction to disconnect the distributed generation system from the electrical grid network. When the distributed generation system is disconnected from the electrical grid network, the controller may determine whether the grid network is valid.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jun 12 00:00:00 EDT 2018},
month = {Tue Jun 12 00:00:00 EDT 2018}
}

Works referenced in this record:

Control of small distributed energy resources
patent, October 2006


Control of small distributed energy resources
patent, March 2010


Substantially bumpless transfer grid synchronization
patent, November 2012


Micro-grid PV system
patent, September 2016


Systems and Methods for Islanding Detection
patent-application, November 2011


Control Device of Wind Turbine Generator and Control Method Thereof
patent-application, December 2011


Supervisory Control Method and Equipment for Smart Grids
patent-application, February 2012


Systems and Methods for Solar Photovoltaic Energy Collection and Conversion
patent-application, July 2013


Locking frequency band exposure method for islanding detection and prevention in distributed generation
conference, September 2014


Locking frequency band detection method for grid-tied PV inverter islanding protection
conference, September 2015