DC compensation for power transformer through neutral DC injection

Burkes, Klaehn W.; Ceyssens, Vincent J.; Enslin, Johan H. R.; Nazir, Moazzam

Advanced Search OptionsAdvanced Search queries use a traditional Term Search. For more info, see our FAQ.

All Fields:

Patent Title:

Abstract:

Assignee:

Inventor(s):

Patent Number:

Patent Classification (CPC):

All Classifications
A - human necessities
A01 - agriculture
A21 - baking
A22 - butchering
A23 - foods or foodstuffs
A24 - tobacco
A41 - wearing apparel
A42 - headwear
A43 - footwear
A44 - haberdashery
A45 - hand or travelling articles
A46 - brushware
A47 - furniture
A61 - medical or veterinary science
A62 - life-saving
A63 - sports
A99 - subject matter not otherwise provided for in this section
B - performing operations
B01 - physical or chemical processes or apparatus in general
B02 - crushing, pulverising, or disintegrating
B03 - separation of solid materials using liquids or using pneumatic tables or jigs
B04 - centrifugal apparatus or machines for carrying-out physical or chemical processes
B05 - spraying or atomising in general
B06 - generating or transmitting mechanical vibrations in general
B07 - separating solids from solids
B08 - cleaning
B09 - disposal of solid waste
B21 - mechanical metal-working without essentially removing material
B22 - casting
B23 - machine tools
B24 - grinding
B25 - hand tools
B26 - hand cutting tools
B27 - working or preserving wood or similar material
B28 - working cement, clay, or stone
B29 - working of plastics
B30 - presses
B31 - making articles of paper, cardboard or material worked in a manner analogous to paper
B32 - layered products
B33 - additive manufacturing technology
B41 - printing
B42 - bookbinding
B43 - writing or drawing implements
B44 - decorative arts
B60 - vehicles in general
B61 - railways
B62 - land vehicles for travelling otherwise than on rails
B63 - ships or other waterborne vessels
B64 - aircraft
B65 - conveying
B66 - hoisting
B67 - opening, closing {or cleaning} bottles, jars or similar containers
B68 - saddlery
B81 - microstructural technology
B82 - nanotechnology
B99 - subject matter not otherwise provided for in this section
C - chemistry
C01 - inorganic chemistry
C02 - treatment of water, waste water, sewage, or sludge
C03 - glass
C04 - cements
C05 - fertilisers
C06 - explosives
C07 - organic chemistry
C08 - organic macromolecular compounds
C09 - dyes
C10 - petroleum, gas or coke industries
C11 - animal or vegetable oils, fats, fatty substances or waxes
C12 - biochemistry
C13 - sugar industry
C14 - skins
C21 - metallurgy of iron
C22 - metallurgy
C23 - coating metallic material
C25 - electrolytic or electrophoretic processes
C30 - crystal growth
C40 - combinatorial technology
C99 - subject matter not otherwise provided for in this section
D - textiles
D01 - natural or man-made threads or fibres
D02 - yarns
D03 - weaving
D04 - braiding
D05 - sewing
D06 - treatment of textiles or the like
D07 - ropes
D10 - indexing scheme associated with sublasses of section d, relating to textiles
D21 - paper-making
D99 - subject matter not otherwise provided for in this section
E - fixed constructions
E01 - construction of roads, railways, or bridges
E02 - hydraulic engineering
E03 - water supply
E04 - building
E05 - locks
E06 - doors, windows, shutters, or roller blinds in general
E21 - earth drilling
E99 - subject matter not otherwise provided for in this section
F - mechanical engineering
F01 - machines or engines in general
F02 - combustion engines
F03 - machines or engines for liquids
F04 - positive - displacement machines for liquids
F05 - indexing schemes relating to engines or pumps in various subclasses of classes f01-f04
F15 - fluid-pressure actuators
F16 - engineering elements and units
F17 - storing or distributing gases or liquids
F21 - lighting
F22 - steam generation
F23 - combustion apparatus
F24 - heating
F25 - refrigeration or cooling
F26 - drying
F27 - furnaces
F28 - heat exchange in general
F41 - weapons
F42 - ammunition
F99 - subject matter not otherwise provided for in this section
G - physics
G01 - measuring
G02 - optics
G03 - photography
G04 - horology
G05 - controlling
G06 - computing
G07 - checking-devices
G08 - signalling
G09 - education
G10 - musical instruments
G11 - information storage
G12 - instrument details
G16 - information and communication technology [ict] specially adapted for specific application fields
G21 - nuclear physics
G99 - subject matter not otherwise provided for in this section
H - electricity
H01 - basic electric elements
H02 - generation
H03 - basic electronic circuitry
H04 - electric communication technique
H05 - electric techniques not otherwise provided for
H99 - subject matter not otherwise provided for in this section
Y - new / cross sectional technologies
Y02 - technologies or applications for mitigation or adaptation against climate change
Y04 - information or communication technologies having an impact on other technology areas
Y10 - technical subjects covered by former uspc

More Options ...

Title: DC compensation for power transformer through neutral DC injection

Abstract

A power transmission system can include a transformer and compensator circuit(s), each coupled between a node of the transformer and a ground connection. The compensator circuit(s) can each be configured to counteract a DC signal component of an AC signal at the transformer. The compensator circuit(s) can include a converter circuit having an AC side and a DC side and configured to convert a DC voltage on the DC side to an AC signal at the AC side. The compensator circuit(s) can include a DC link coupled to the DC side of the converter circuit. The compensator circuit(s) can include a controller configured to measure a DC signal component between the load and the ground; to determine, based at least in part on the DC signal component, a compensating signal configured to counteract the DC signal component; and to inject, by the converter circuit, the compensating signal to counteract the DC signal component.

Inventors:: Burkes, Klaehn W.; Ceyssens, Vincent J.; Enslin, Johan H. R.; Nazir, Moazzam

Issue Date:: 2022-06-28

Research Org.:: Savannah River Site (SRS), Aiken, SC (United States); Clemson Univ., SC (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1893098

Patent Number(s):: 11374503

Application Number:: 17/196,152

Assignee:: Savannah River Nuclear Solutions, LLC (Aiken, SC); Clemson University (Clemson, SC)

Patent Classifications (CPCs):: H - ELECTRICITY H02 - GENERATION H02M - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS

Show more

H - ELECTRICITY H02 - GENERATION H02M - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS
H02M1/40 - Means for preventing magnetic saturation
H02M7/537 - using semiconductor devices only, e.g. single switched pulse inverters

Show less

DOE Contract Number:: AC09-08SR22470

Resource Type:: Patent

Resource Relation:: Patent File Date: 03/09/2021

Country of Publication:: United States

Language:: English

Citation Formats


                    Burkes, Klaehn W., Ceyssens, Vincent J., Enslin, Johan H. R., and Nazir, Moazzam. DC compensation for power transformer through neutral DC injection.  United States: N. p., 2022. 
        Web.

Copy to clipboard


                    Burkes, Klaehn W., Ceyssens, Vincent J., Enslin, Johan H. R., & Nazir, Moazzam. DC compensation for power transformer through neutral DC injection.  United States.

Copy to clipboard


                    Burkes, Klaehn W., Ceyssens, Vincent J., Enslin, Johan H. R., and Nazir, Moazzam. Tue .  
        "DC compensation for power transformer through neutral DC injection".  United States.  https://www.osti.gov/servlets/purl/1893098.

Copy to clipboard


                    
@article{osti_1893098,

  title        = {DC compensation for power transformer through neutral DC injection},

  author       = {Burkes, Klaehn W. and Ceyssens, Vincent J. and Enslin, Johan H. R. and Nazir, Moazzam},

  abstractNote = {A power transmission system can include a transformer and compensator circuit(s), each coupled between a node of the transformer and a ground connection. The compensator circuit(s) can each be configured to counteract a DC signal component of an AC signal at the transformer. The compensator circuit(s) can include a converter circuit having an AC side and a DC side and configured to convert a DC voltage on the DC side to an AC signal at the AC side. The compensator circuit(s) can include a DC link coupled to the DC side of the converter circuit. The compensator circuit(s) can include a controller configured to measure a DC signal component between the load and the ground; to determine, based at least in part on the DC signal component, a compensating signal configured to counteract the DC signal component; and to inject, by the converter circuit, the compensating signal to counteract the DC signal component.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2022},

  month        = {6}

}

Copy to clipboard

Patent:

Save / Share:

Export Metadata

Save to My Library

Works referenced in this record:

Blocker of geomagnetically induced currents (GIC)
patent, July 2016

Ramirez, Alberto Raul
US Patent Document 9,396,866
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/9396866

Active filter for reduction of common mode current
patent, October 2003

Pelly, Brian R.
US Patent Document 6,636,107
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6636107

Apparatus, Systems, and Methods for Electromagnetic Protection
patent-application, January 2014

Brandt, Kurt Robert
US Patent Application 13/876353; 20140008119 A1
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20140008119

GIC occurrences and GIC test for 400 kV system transformer
journal, April 2002

Lahtinen, M.; Elovaara, J.
IEEE Transactions on Power Delivery, Vol. 17, Issue 2
https://doi.org/10.1109/61.997938

Method and apparatus for attenuation of, and damage protection from, high energy electromagnetic pulses
patent, March 2000

Bishop, John
US Patent Document 6,034,855
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6034855

A Colorful Blackout: The Havoc Caused by Auroral Electrojet Generated Magnetic Field Variations in 1989
journal, November 2016

Guillon, Sebastien; Toner, Patrick; Gibson, Louis
IEEE Power and Energy Magazine, Vol. 14, Issue 6
https://doi.org/10.1109/MPE.2016.2591760

Layered neural nets for pattern recognition
journal, July 1988

Widrow, B.; Winter, R. G.; Baxter, R. A.
IEEE Transactions on Acoustics, Speech, and Signal Processing, Vol. 36, Issue 7
https://doi.org/10.1109/29.1638

Battery Energy Storage And Power System
patent-application, February 2015

Tengner, Tomas; Alves, Roberto
US Patent Application 14/531812; 20150055387 A1
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20150055387

Countermeasure for EMP-E3 induced currents
patent, October 2011

Ramirez, Vanessa; Ramirez, Alberto Raul
US Patent Document 8,035,935
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8035935

Device and method for reducing a magnetic unidirectional flux component in the core of a three-phase transformer
patent, May 2019

Hamberger, Peter
US Patent Document 10,297,383
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/10297383

Single-Phase Multi-Level Asymmetric Inverter With AC-Bypass And Asymmetric Modulation Strategy
patent-application, September 2020

Restrepo, Carlos; Salazar-Llinas, Andres; Berzoy Llerena, Alberto
US Patent Application 16/289022; 20200280267 A1
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20200280267

Response of Power System Protective Relays to Solar and HEMP MHD-E3 GIC
conference, March 2019

Mattei, Andrew K.; Grady, W. Mack
2019 72nd Conference for Protective Relay Engineers (CPRE)
https://doi.org/10.1109/CPRE.2019.8765893

Effects of GIC on power transformers and power systems
conference, May 2012

Girgis, R.; Vedante, K.
PES T&D 2012
https://doi.org/10.1109/TDC.2012.6281595

Transformerless series sag compensation with a cascaded multilevel inverter
journal, August 2002

Visser, A. J.; Enslin, J. H. R.; de T. Mouton, H.
IEEE Transactions on Industrial Electronics, Vol. 49, Issue 4
https://doi.org/10.1109/TIE.2002.801067

Geomagnetic storm of 29-31 October 2003: Geomagnetically induced currents and their relation to problems in the Swedish high-voltage power transmission system: GEOMAGNETICALLY INDUCED CURRENTS
journal, August 2005

Pulkkinen, Antti; Lindahl, Sture; Viljanen, Ari
Space Weather, Vol. 3, Issue 8
https://doi.org/10.1029/2004SW000123

Improvement of the Electric Power Quality Using Series Active and Shunt Passive Filters
journal, April 2010

Salmeron, P.; Litran, S. P.
IEEE Transactions on Power Delivery, Vol. 25, Issue 2
https://doi.org/10.1109/TPWRD.2009.2034902

Mitigation of geomagnetically induced currents by variable series reactor
conference, September 2017

Hussein, Ahmed Abu
2017 North American Power Symposium (NAPS)
https://doi.org/10.1109/NAPS.2017.8107277

Interface Converter Common Mode Voltage Control
patent-application, February 2018

Chen, Fang; Burgos, Rolando; Boroyevich, Dushan
US Patent Application 15/242683; 20180054140 A1
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20180054140

Reactive compensation. Control of shunt compensation with reference to new design concepts
journal, January 1981

Gyugyi, Laszlo
IEE Proceedings C Generation, Transmission and Distribution, Vol. 128, Issue 6
https://doi.org/10.1049/ip-c.1981.0060

Controller of adjustable DC voltage for a transformerless reactive series compensator
patent, June 2001

Fujii, Toshiyuki; Beer, Andreas
US Patent Document 6,242,895
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/6242895

Continuous uninterruptable AC grounding system for power system protection
patent, November 2014

Faxvog, Frederick R.; Jensen, Wallace; Nordling, Gale
US Patent Document 8,878,396
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8878396

Method and apparatus for protecting power systems from extraordinary electromagnetic pulses
patent, October 2012

Birnbach, Curtis A.
US Patent Document 8,300,378
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8300378

Multi-Phase Electric Drive and Method Therefor
patent-application, December 2016

Tran, Quyen; Voegeli, Andreas
US Patent Application 15/174333; 20160359424 A1
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20160359424

GIC observations and studies in the Hydro-Québec power system
journal, November 2002

Bolduc, Léonard
Journal of Atmospheric and Solar-Terrestrial Physics, Vol. 64, Issue 16
https://doi.org/10.1016/S1364-6826(02)00128-1

Geomagnetically Induced Currents in European High-Voltage Power Systems
conference, January 2006

Pirjola, Risto; Boteler, David
2006 Canadian Conference on Electrical and Computer Engineering
https://doi.org/10.1109/CCECE.2006.277540

Neural network control technique based sensorless DSTATCOM for the power conditioning
conference, December 2015

Mangaraj, Mrutyunjaya; Panda, Anup Kumar; Penthia, Trilochan
2015 Annual IEEE India Conference (INDICON)
https://doi.org/10.1109/INDICON.2015.7443184

Sensing and control electronics for a power grid protection system
patent, September 2013

Faxvog, Frederick R.; Jensen, Wallace; Noe, Terrance R.
US Patent Document 8,537,508
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8537508

Protection of power transformers against geomagnetically induced currents
journal, January 2011

Gurevich, Vladimir
Serbian Journal of Electrical Engineering, Vol. 8, Issue 3
https://doi.org/10.2298/SJEE1103333G

Method and apparatus for protecting power transformers from large electro-magnetic disturbances
patent, April 2015

Hoffman, Gary R.; Kwon, Edward S.; Cai, Hong
US Patent Document 9,018,962
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/9018962

System and Method for Suppressing Electromagnetic Pulse-Induced Electrical System Surges
patent-application, July 2019

Carty, Timothy A.; Deyo, Jr., Harold Stanley
US Patent Application 16/240897; 20190214814 A1
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20190214814

Power Supply System Including DC-to-DC Converter and Control Method Therefor
patent-application, October 2020

Lee, Jeong Heum; Kim, Soo Hong; Jang, Ju Young
US Patent Application 16/956897; 20200321880 A1
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20200321880

Surge protection apparatus and method using the same
patent, March 2014

Chu, Kwang-Uk; Namkoong, Up; Lee, Kyung-Hoon
US Patent Document 8,681,467
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/8681467

System and Method for Stabilizing an Alternating Voltage Grid
patent-application, April 2021

Niemann, Bernd; Pilz, Georg; Morgenstern, Ralph
US Patent Application 16/607936; 20210098989 A1
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20210098989

Systems and Methods for Actuating a Transformer Neutral Blocking System
patent-application, July 2018

Fuchs, Greg; Jensen, Wallace; Faxvog, Frederick R.
US Patent Application 15/923829; 20180205217 A1
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20180205217

Method and system to detect and characterize electromagnetic pulses for the protection of critical infrastructure components
patent, February 2017

Cox, Donald P.
US Patent Document 9,562,938
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/9562938

Power grid stability protection against GIC using a capacitive grounding circuit
conference, May 2012

Rajapakse, A. D.; Perera, N.; Faxvog, F. R.
PES T&D 2012
https://doi.org/10.1109/TDC.2012.6281589

Rotor heating effects from geomagnetic induced currents
journal, April 1994

Gish, W. B.; Feero, W. E.; Rockefeller, G. D.
IEEE Transactions on Power Delivery, Vol. 9, Issue 2
https://doi.org/10.1109/61.296248

Power Supply and Method of Supplying Power
patent-application, March 2016

Barbosa, Peter; Irving, Brian T.; Chan, Chih-Chiang
US Patent Application 14/488646; 20160079859 A1
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20160079859

Synchronous Sampling DC Link Voltage Control for Microinverters
patent-application, February 2019

Tayebi, Seyed-Milad; Batarseh, Issa
US Patent Application 16/105661; 20190058395 A1
URL: https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/20190058395

Transformer failures in regions incorrectly considered to have low GIC-risk
conference, July 2007

Gaunt, C. T.; Coetzee, G.
2007 IEEE Lausanne Power Tech
https://doi.org/10.1109/PCT.2007.4538419

Fuzzy logic controlled variable resistor for suppressing GIC in transformers
journal, February 2017

Hussein, Ahmed Abu; Ali, Mohd. Hasan
IET Generation, Transmission & Distribution, Vol. 11, Issue 6
https://doi.org/10.1049/iet-gtd.2016.1103

A Comparison of Control Algorithms for DSTATCOM
journal, July 2009

Singh, B.; Solanki, J.
IEEE Transactions on Industrial Electronics, Vol. 56, Issue 7
https://doi.org/10.1109/TIE.2009.2021596

Similar Records in DOE Patents and OSTI.GOV collections:

DC to DC electrical transformer

Patent Finn, John; Nebel, Richard; Moser, Keith; ...

An electrical transformer system using helical electrodes applied to a plasma. Systems and methods transform DC voltages and currents to different DC voltages and currents. Instead of using wires and iron cores similar to known transformers, the present DC to DC transformer system exploits plasma, helical electrodes, an axial magnetic field and radial magnetic field coils, with a control system to specify a radial magnetic field at the edge of a specified magnitude. A DC input voltage is applied, and an output is taken from electrodes at opposite the ends of the central apparatus. The system and apparatus contains amore » « less
Full Text Available
Multiple DC, single AC converter with a switched DC transformer

Patent Donnelly, Matthew K [Kennewick, WA]; Hammerstrom, Donald J [West Richland, WA]

The invention is an improvement of the PASC inverter, wherein the improvements include the reduction from two shorting gates per transformer to one shorting gate per transformer and replacement of active control of the shorting gate with passive control of the shorting gate. Further advantages are obtained through the use of anti-parallel gate sets.
Full Text Available
DC-DC electrical transformer

Patent Finn, John; Akcay, Cihan; Barnes, Daniel; ...

An apparatus and corresponding systems and methods for managing electric power, particularly a transformer system and method, and more specifically a transformer for direct current. An example apparatus includes a chamber configured to contain plasma. The apparatus includes input electrodes disposed at least partially within the chamber, and configured to receive a first direct current input into the chamber. The input electrodes are configured to cause the input direct current to induce motion in the plasma. Motion induced in the plasma transforms current flowing there-through. At output electrodes extend from the chamber. The output electrodes conduct a second direct current,more » « less
Full Text Available
DC-AC electrical transformer

Patent Nebel, Richard; Akcay, Cihan; Barnes, Daniel; ...

An apparatus and corresponding systems and methods for managing electric power, particularly a transformer system and method, and more specifically a transformer for transforming direct current to alternating current. An example apparatus includes a chamber configured to contain plasma. The apparatus includes input electrodes disposed at least partially within the chamber, and configured to receive direct current input into the chamber. The input electrodes are configured to cause the input direct current to induce motion in the plasma. Motion induced in the plasma transforms current flowing there-through. Output electrodes extend from the chamber, which output electrodes may rotated in amore » « less
Full Text Available
Switching coordination of distributed dc-dc converters for highly efficient photovoltaic power plants

Patent Agamy, Mohammed; Elasser, Ahmed; Sabate, Juan Antonio; ...

A distributed photovoltaic (PV) power plant includes a plurality of distributed dc-dc converters. The dc-dc converters are configured to switch in coordination with one another such that at least one dc-dc converter transfers power to a common dc-bus based upon the total system power available from one or more corresponding strings of PV modules. Due to the coordinated switching of the dc-dc converters, each dc-dc converter transferring power to the common dc-bus continues to operate within its optimal efficiency range as well as to optimize the maximum power point tracking in order to increase the energy yield of the PVmore » power plant. « less
Full Text Available

Similar Records

Title: DC compensation for power transformer through neutral DC injection

Abstract

Citation Formats

Blocker of geomagnetically induced currents (GIC) patent, July 2016

Active filter for reduction of common mode current patent, October 2003

Apparatus, Systems, and Methods for Electromagnetic Protection patent-application, January 2014

GIC occurrences and GIC test for 400 kV system transformer journal, April 2002

Method and apparatus for attenuation of, and damage protection from, high energy electromagnetic pulses patent, March 2000

A Colorful Blackout: The Havoc Caused by Auroral Electrojet Generated Magnetic Field Variations in 1989 journal, November 2016

Layered neural nets for pattern recognition journal, July 1988

Battery Energy Storage And Power System patent-application, February 2015

Countermeasure for EMP-E3 induced currents patent, October 2011

Device and method for reducing a magnetic unidirectional flux component in the core of a three-phase transformer patent, May 2019

Single-Phase Multi-Level Asymmetric Inverter With AC-Bypass And Asymmetric Modulation Strategy patent-application, September 2020

Response of Power System Protective Relays to Solar and HEMP MHD-E3 GIC conference, March 2019

Effects of GIC on power transformers and power systems conference, May 2012

Transformerless series sag compensation with a cascaded multilevel inverter journal, August 2002

Geomagnetic storm of 29-31 October 2003: Geomagnetically induced currents and their relation to problems in the Swedish high-voltage power transmission system: GEOMAGNETICALLY INDUCED CURRENTS journal, August 2005

Improvement of the Electric Power Quality Using Series Active and Shunt Passive Filters journal, April 2010

Mitigation of geomagnetically induced currents by variable series reactor conference, September 2017

Interface Converter Common Mode Voltage Control patent-application, February 2018

Reactive compensation. Control of shunt compensation with reference to new design concepts journal, January 1981

Controller of adjustable DC voltage for a transformerless reactive series compensator patent, June 2001

Continuous uninterruptable AC grounding system for power system protection patent, November 2014

Method and apparatus for protecting power systems from extraordinary electromagnetic pulses patent, October 2012

Multi-Phase Electric Drive and Method Therefor patent-application, December 2016

GIC observations and studies in the Hydro-Québec power system journal, November 2002

Geomagnetically Induced Currents in European High-Voltage Power Systems conference, January 2006

Neural network control technique based sensorless DSTATCOM for the power conditioning conference, December 2015

Sensing and control electronics for a power grid protection system patent, September 2013

Protection of power transformers against geomagnetically induced currents journal, January 2011

Method and apparatus for protecting power transformers from large electro-magnetic disturbances patent, April 2015

System and Method for Suppressing Electromagnetic Pulse-Induced Electrical System Surges patent-application, July 2019

Power Supply System Including DC-to-DC Converter and Control Method Therefor patent-application, October 2020

Surge protection apparatus and method using the same patent, March 2014

System and Method for Stabilizing an Alternating Voltage Grid patent-application, April 2021

Systems and Methods for Actuating a Transformer Neutral Blocking System patent-application, July 2018

Method and system to detect and characterize electromagnetic pulses for the protection of critical infrastructure components patent, February 2017

Power grid stability protection against GIC using a capacitive grounding circuit conference, May 2012

Rotor heating effects from geomagnetic induced currents journal, April 1994

Power Supply and Method of Supplying Power patent-application, March 2016

Synchronous Sampling DC Link Voltage Control for Microinverters patent-application, February 2019

Transformer failures in regions incorrectly considered to have low GIC-risk conference, July 2007

Fuzzy logic controlled variable resistor for suppressing GIC in transformers journal, February 2017

A Comparison of Control Algorithms for DSTATCOM journal, July 2009

Blocker of geomagnetically induced currents (GIC)
patent, July 2016

Active filter for reduction of common mode current
patent, October 2003

Apparatus, Systems, and Methods for Electromagnetic Protection
patent-application, January 2014

GIC occurrences and GIC test for 400 kV system transformer
journal, April 2002

Method and apparatus for attenuation of, and damage protection from, high energy electromagnetic pulses
patent, March 2000

A Colorful Blackout: The Havoc Caused by Auroral Electrojet Generated Magnetic Field Variations in 1989
journal, November 2016

Layered neural nets for pattern recognition
journal, July 1988

Battery Energy Storage And Power System
patent-application, February 2015

Countermeasure for EMP-E3 induced currents
patent, October 2011

Device and method for reducing a magnetic unidirectional flux component in the core of a three-phase transformer
patent, May 2019

Single-Phase Multi-Level Asymmetric Inverter With AC-Bypass And Asymmetric Modulation Strategy
patent-application, September 2020

Response of Power System Protective Relays to Solar and HEMP MHD-E3 GIC
conference, March 2019

Effects of GIC on power transformers and power systems
conference, May 2012

Transformerless series sag compensation with a cascaded multilevel inverter
journal, August 2002

Geomagnetic storm of 29-31 October 2003: Geomagnetically induced currents and their relation to problems in the Swedish high-voltage power transmission system: GEOMAGNETICALLY INDUCED CURRENTS
journal, August 2005

Improvement of the Electric Power Quality Using Series Active and Shunt Passive Filters
journal, April 2010

Mitigation of geomagnetically induced currents by variable series reactor
conference, September 2017

Interface Converter Common Mode Voltage Control
patent-application, February 2018

Reactive compensation. Control of shunt compensation with reference to new design concepts
journal, January 1981

Controller of adjustable DC voltage for a transformerless reactive series compensator
patent, June 2001

Continuous uninterruptable AC grounding system for power system protection
patent, November 2014

Method and apparatus for protecting power systems from extraordinary electromagnetic pulses
patent, October 2012

Multi-Phase Electric Drive and Method Therefor
patent-application, December 2016

GIC observations and studies in the Hydro-Québec power system
journal, November 2002

Geomagnetically Induced Currents in European High-Voltage Power Systems
conference, January 2006

Neural network control technique based sensorless DSTATCOM for the power conditioning
conference, December 2015

Sensing and control electronics for a power grid protection system
patent, September 2013

Protection of power transformers against geomagnetically induced currents
journal, January 2011

Method and apparatus for protecting power transformers from large electro-magnetic disturbances
patent, April 2015

System and Method for Suppressing Electromagnetic Pulse-Induced Electrical System Surges
patent-application, July 2019

Power Supply System Including DC-to-DC Converter and Control Method Therefor
patent-application, October 2020

Surge protection apparatus and method using the same
patent, March 2014

System and Method for Stabilizing an Alternating Voltage Grid
patent-application, April 2021

Systems and Methods for Actuating a Transformer Neutral Blocking System
patent-application, July 2018

Method and system to detect and characterize electromagnetic pulses for the protection of critical infrastructure components
patent, February 2017

Power grid stability protection against GIC using a capacitive grounding circuit
conference, May 2012

Rotor heating effects from geomagnetic induced currents
journal, April 1994

Power Supply and Method of Supplying Power
patent-application, March 2016

Synchronous Sampling DC Link Voltage Control for Microinverters
patent-application, February 2019

Transformer failures in regions incorrectly considered to have low GIC-risk
conference, July 2007

Fuzzy logic controlled variable resistor for suppressing GIC in transformers
journal, February 2017

A Comparison of Control Algorithms for DSTATCOM
journal, July 2009