System and method for islanding detection and prevention in distributed generation

Bhowmik, Shibashis; Mazhari, Iman; Parkhideh, Babak

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

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.

Inventors:: Bhowmik, Shibashis; Mazhari, Iman; Parkhideh, Babak

Issue Date:: 2018-09-04

Research Org.:: SINEWATTS, INC., Charlotte, NC (United States); THE UNIVERSITY OF NORTH CAROLINA AT CHARLOTTE, Charlotte, NC (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1472075

Patent Number(s):: 10069304

Application Number:: 14/737,468

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

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H - ELECTRICITY H02 - GENERATION H02J - CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER
H02J2300/20 - The dispersed energy generation being of renewable origin
H02J3/381 - {Dispersed generators}
H02J3/388 - {Islanding, i.e. disconnection of local power supply from the network}

Show less

DOE Contract Number:: EE0006459

Resource Type:: Patent

Resource Relation:: Patent File Date: 2015 Jun 11

Country of Publication:: United States

Language:: English

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.

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                    Bhowmik, Shibashis, Mazhari, Iman, & Parkhideh, Babak. System and method for islanding detection and prevention in distributed generation.  United States.

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                    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/1472075.

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@article{osti_1472075,

  title        = {System and method for islanding detection and prevention in distributed generation},

  author       = {Bhowmik, Shibashis and Mazhari, Iman and Parkhideh, Babak},

  abstractNote = {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.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2018},

  month        = {9}

}

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Works referenced in this record:

Bi-directional power conversion apparatus for combination of energy sources
patent, July 2001

Bhowmik, Shibashis
US Patent Document 6,268,666
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6268666

Anti-islanding method and apparatus for distributed power generation
patent, April 2001

Wills, Robert H.
US Patent Document 6,219,623
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Systems and Methods for Solar Photovoltaic Energy Collection and Conversion
patent-application, July 2013

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

Sekoguchi, Masahiro; Fukui, Chihiro; Yamada, Tetsuo
US Patent Application 13/190666; 20120029716
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Locking frequency band exposure method for islanding detection and prevention in distributed generation
conference, September 2014

Mazhari, Iman; Beghou, Lotfi; Enslin, Johan
2014 IEEE Energy Conversion Congress and Exposition (ECCE)
https://doi.org/10.1109/ECCE.2014.6953995

System and Method for Anti-Islanding, Such as Anti-Islanding for a Grid-Connected Photovoltaic Inverter
patent-application, May 2008

Ohm, Dal Y.
US Patent Application 11/872598; 20080122293
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Voltage-Sensed System and Method for Anti-islanding Protection of Grid-Connected Inverters
patent-application, July 2011

Krein, Philip T.
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Control Device of Wind Turbine Generator and Control Method Thereof
patent-application, December 2011

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

Mazhari, Iman; Jafarian, Hamidreza; Parkhideh, Babak
2015 IEEE Energy Conversion Congress and Exposition (ECCE)
https://doi.org/10.1109/ECCE.2015.7309939

Power system islanding detection with waveform fitting
patent, June 2017

Slavin, Keith R.
US Patent Document 9,692,319
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/9692319

Systems and methods for increasing output current quality, output power, and reliability of grid-interactive inverters
patent, July 2014

Jones, Christopher R.; Kral, Alexandre
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Method and area electric power system detecting islanding by employing controlled reactive power injection by a number of inverters
patent, December 2012

Bhavaraju, Vijay; Peplinski, Richard P.; Prasai, Anish
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Anti-islanding device and method for grid connected inverters using random noise injection
patent-application, September 2003

Tuladhar, Anil
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Method, memory media and apparatus for detection of grid disconnect
patent, September 2008

Ye, Zhihong; Du, Pengwei
US Patent Document 7,427,815
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Method and Area electric Power System Detecting Islanding by Employing Controlled Reactive Power Injection by a Number of Inverters
patent-application, May 2011

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patent-application, November 2011

Ropp, Michael
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Substantially Bumpless Transfer Grid Synchronization
patent-application, September 2011

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System and method for islanding detection and prevention in distributed generation

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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.
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Similar Records

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

Abstract

Citation Formats

Bi-directional power conversion apparatus for combination of energy sources patent, July 2001

Anti-islanding method and apparatus for distributed power generation patent, April 2001

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

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

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

System and Method for Anti-Islanding, Such as Anti-Islanding for a Grid-Connected Photovoltaic Inverter patent-application, May 2008

Voltage-Sensed System and Method for Anti-islanding Protection of Grid-Connected Inverters patent-application, July 2011

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

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

Power system islanding detection with waveform fitting patent, June 2017

Systems and methods for increasing output current quality, output power, and reliability of grid-interactive inverters patent, July 2014

Method and area electric power system detecting islanding by employing controlled reactive power injection by a number of inverters patent, December 2012

Anti-islanding device and method for grid connected inverters using random noise injection patent-application, September 2003

Method, memory media and apparatus for detection of grid disconnect patent, September 2008

Control of Small Distributed Energy Resources patent-application, March 2004

Method and Area electric Power System Detecting Islanding by Employing Controlled Reactive Power Injection by a Number of Inverters patent-application, May 2011

Micro-Grid PV System patent-application, September 2014

Method and Apparatus for Anti-Islanding Protection of Distributed Generations patent-application, January 2006

Frequency Control and Power Balancing In Disturbed Power Inverter System and Method Thereof patent-application, January 2008

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

Substantially Bumpless Transfer Grid Synchronization patent-application, September 2011

Bi-directional power conversion apparatus for combination of energy sources
patent, July 2001

Anti-islanding method and apparatus for distributed power generation
patent, April 2001

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

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

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

System and Method for Anti-Islanding, Such as Anti-Islanding for a Grid-Connected Photovoltaic Inverter
patent-application, May 2008

Voltage-Sensed System and Method for Anti-islanding Protection of Grid-Connected Inverters
patent-application, July 2011

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

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

Power system islanding detection with waveform fitting
patent, June 2017

Systems and methods for increasing output current quality, output power, and reliability of grid-interactive inverters
patent, July 2014

Method and area electric power system detecting islanding by employing controlled reactive power injection by a number of inverters
patent, December 2012

Anti-islanding device and method for grid connected inverters using random noise injection
patent-application, September 2003

Method, memory media and apparatus for detection of grid disconnect
patent, September 2008

Control of Small Distributed Energy Resources
patent-application, March 2004

Method and Area electric Power System Detecting Islanding by Employing Controlled Reactive Power Injection by a Number of Inverters
patent-application, May 2011

Micro-Grid PV System
patent-application, September 2014

Method and Apparatus for Anti-Islanding Protection of Distributed Generations
patent-application, January 2006

Frequency Control and Power Balancing In Disturbed Power Inverter System and Method Thereof
patent-application, January 2008

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

Substantially Bumpless Transfer Grid Synchronization
patent-application, September 2011