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Title: Low modulation index 3-phase solid state transformer

Abstract

A solid-state transformer (SST) comprises a transformer core, a primary winding, a secondary winding, a primary-side switch bank, and a secondary-side switch bank. Each of the switch banks includes six 4-quadrant switches. The twelve 4-quadrant switches are toggled on and off over six clock cycles in a repetitive sequence with a period that is a function of a desired operating frequency of the transformer. The sequence is configured such that at any given time, 2 of 3 input and output phases are connected to the primary and secondary windings. The SST further includes L-C filter circuits that are configured to filter high-frequency components of current and voltage waveforms such that these components are not back-fed to the electrical mains or delivered to a load. The SST includes a primary-side filter circuit and a secondary-side filter circuit that can each include respective L-C filters for three input or output phases.

Inventors:
Issue Date:
Research Org.:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1859983
Patent Number(s):
11152918
Application Number:
17/071,009
Assignee:
National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01F - MAGNETS
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
DOE Contract Number:  
NA0003525
Resource Type:
Patent
Resource Relation:
Patent File Date: 10/15/2020
Country of Publication:
United States
Language:
English

Citation Formats

Koplow, Jeffrey P. Low modulation index 3-phase solid state transformer. United States: N. p., 2021. Web.
Koplow, Jeffrey P. Low modulation index 3-phase solid state transformer. United States.
Koplow, Jeffrey P. Tue . "Low modulation index 3-phase solid state transformer". United States. https://www.osti.gov/servlets/purl/1859983.
@article{osti_1859983,
title = {Low modulation index 3-phase solid state transformer},
author = {Koplow, Jeffrey P.},
abstractNote = {A solid-state transformer (SST) comprises a transformer core, a primary winding, a secondary winding, a primary-side switch bank, and a secondary-side switch bank. Each of the switch banks includes six 4-quadrant switches. The twelve 4-quadrant switches are toggled on and off over six clock cycles in a repetitive sequence with a period that is a function of a desired operating frequency of the transformer. The sequence is configured such that at any given time, 2 of 3 input and output phases are connected to the primary and secondary windings. The SST further includes L-C filter circuits that are configured to filter high-frequency components of current and voltage waveforms such that these components are not back-fed to the electrical mains or delivered to a load. The SST includes a primary-side filter circuit and a secondary-side filter circuit that can each include respective L-C filters for three input or output phases.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2021},
month = {10}
}

Works referenced in this record:

Power management utilizing synchronous common coupling
patent-application, April 2017


Modular converter with multilevel submodules
patent, September 2018


Isolated Dynamic Current Converters
patent-application, August 2013


Solid-State Bidirectional Switch Having a First and a Second Power-FET
patent-application, January 2014


System for Providing Bi-Directional Power Flow and Power Conditioning for Low to High-Voltage Applications
patent-application, March 2021


Design of a Medium Voltage Mobile Utilities Support Equipment based Solid State Transformer (MUSE-SST) with 10 kV SiC MOSFETs for Grid Interconnection
conference, June 2018


Isolated Soft-Switch Single-Stage AC-DC Converter
patent-application, February 2013


Soft switching solid state transformers and converters
patent-application, September 2019


Three-phase isolated rectifer with power factor correction
patent-application, May 2012


Inverter System for Vehicle
patent-application, February 2020


Intelligent integrated battery module
patent, September 2016


Energy Router for Energy Internet
patent-application, August 2016


Power Conversion System
patent-application, December 2015


Power management utilizing synchronous common coupling
patent-application, July 2018


Systems and methods for providing electrical power to wind turbine components
patent-application, December 2018


Dual voltage and current loop linearization control and voltage balancing control for solid state transformer
patent-application, October 2019


Multilevel converter based intelligent universal transformer
patent-application, May 2005


Wireless Power Transfer Device
patent-application, January 2021


Apparatus for bi-directional power switching in low voltage vehicle power distribution systems
patent-application, December 2012


Multilevel Power Conversion
patent-application, September 2009


Drive Control for a Three-Phase Motor
patent-application, February 2021


Semiconductor Device Having a Bidirectional Switch and Discharge Circuit
patent-application, October 2019


High voltage AC machine winding with grounded neutral circuit
patent, May 2005


Isolated dynamic current converters
patent, June 2015


Hybrid ignition with stress-balanced coils
patent, September 1999


N-sine wave inverter
patent-application, November 2017


High speed bi-directional solid state switch
patent-application, November 2004


Alternating current solid-state switch
patent-application, May 2021


Multi-phase AC/AC Step-down Converter for Distribution Systems
patent-application, August 2015


Switch Configuration for a Matrix Convertor
patent-application, October 2015


Battery charger for electric vehicle
patent, June 2020