Tutorial


Tutorial 3SiC Power Device Design, HV SiC Devices based High Power/Voltage Power Converters and Applications Enabled by Advances in Medium Frequency Magnetics
Date/Time24th May, 2021 Monday / 09:00 - 12:00 hrs
SpeakerSubhashish Bhattacharya, North Carolina State University

Abstract

The tutorial will include HV SiC MOSFETs and 15kV SiC IGBT based applications of high power and MV power converters in all industry sectors - HVDC, FACTS, power quality, MV motor drives (including high-speed machines with high fundamental frequency), MVDC grids, MV grid-connected converters for renewables such as solar, wind, etc., MV converters for mining applications, MV converters for traction applications, MV converters for industrial applications such as steel mills, cement, and others; with present OEM solutions. The opportunities for HV SiC devices for MV and high power converters and utility applications and the challenges to applying these HV SiC devices will be presented in-depth with SiC device voltage ranges from 1200V to 1700V MOSFETs, and HV 10 kV - 15 kV MOSFETs, JBS diodes, and 15 kV SiC IGBTs, including series connection of devices. The potential and challenges of the HV 10-15 kV devices to enable MV power conversion systems, including MV motor drives, FACTS, and MVDC grids, will be explored with demonstrated and pilot application examples of SST (Solid State Transformer), MV SiC power converters for grid-tied solar applications, MV motor drives, shipboard power supply applications, and MV DC grids. The roadmap of HV SiC power devices in terms of cost targets, module packaging, and reliability qualification of HV SiC devices will be addressed. Advances in medium frequency magnetics for WBG devices based power converters and especially for high power converters, with the latest advances in magnetic material qualification and characterization will be included.

• Application of High power/voltage power converters

    ▪ Applications include HVDC, FACTS and power quality, MV motor drives (including high-speed machines with high fundamental frequency), MV DC grids, MV grid connected converters for renewables such as solar, wind, etc., MV converters for mining applications, MV converters for traction applications, MV converters for industrial applications such as steel mills, cement, and others

• Performance metrics, features and detailed survey of OEM solutions for various High power/voltage power converters

    ▪ Performance improvements of Si devices [including HV Si IGBTs, RC-IGBTs (Reverse Conducting IGBTs), IEGTs, HV Thyristors] and its impact on High power/voltage power converters

• Potential of HV SiC power devices [15kV IGBTs versus 15kV MOSFETs; 10kV, 6.5kV, 3.3kV MOSFETs; 6.5kV and 4.5kV SuperCascode JFETs; 1.2-1.7kV MOSFETs] High power/voltage power converters

    ▪ HV isolation requirements, design and validation of Gate Drivers to meet IEC and UL standards for MV system voltages

    ▪ Short circuit capability and Avalanche energy characterization of HV SiC power devices

    ▪ Converter design considerations

    ▪ Performance evaluation and metrics of High power/voltage power converters

    ▪ Series connection of HV SiC power devices and its performance evaluation for High power/voltage power converters

    ▪ Module packaging of HV SiC power devices − is non-isolated module a requirement for High Voltage power converters

• Application examples and performance of MV SiC power converters

    ▪ SST (Solid State Transformer) with 15kV SiC IGBTs grid tied at MV

    ▪ SST with 10kV MOSFETs grid tied at MV for Navy shipboard applications

    ▪ MV 10kV SiC MOSFET converter for high speed (with high fundamental frequency) MV rated motor drives

    ▪ SST with RB Reverse Blocking) SiC MOSFET with MV grid tie

    ▪ SST for railway traction applications

    ▪ MV SiC power converters for grid tied solar applications

    ▪ MV DC-DC converters for DC grid

• Roadmap for HV SiC power devices

    ▪ Cost targets and projections based on DOE PowerAmerica Institute for WBG power devices based power electronics commercialization

    ▪ Module packaging − challenges, thermal management, standardization of modules, volume production, and multiple sourcing of modules

• Magnetics for High Power Converters

This tutorial will highlight the latest advances in magnetic material qualification and characterization.

Duration

Presentation duration: 3 hours and 15-30 minutes Q&A [total 3.5 hours]

Outline

Application of High power/voltage power converters

    ▪ Applications include HVDC, FACTS and power quality, MV motor drives (including high-speed machines with high fundamental frequency), MV DC grids, MV grid connected converters for renewables such as solar, wind, etc., MV converters for mining applications, MV converters for traction applications, MV converters for industrial applications such as steel mills, cement, and others

• Performance metrics, features and detailed survey of OEM solutions for various High power/voltage power converters

    • Performance improvements of Si devices [including HV Si IGBTs, RC-IGBTs (Reverse Conducting IGBTs), IEGTs, HV Thyristors] and its impact on High power/voltage power converters

• Potential of HV SiC power devices [15kV IGBTs versus 15kV MOSFETs; 10kV, 6.5kV, 3.3kV MOSFETs; 6.5kV and 4.5kV SuperCascode JFETs; 1.2-1.7kV MOSFETs] High power/voltage power converters

    ▪ HV isolation requirements, design and validation of Gate Drivers to meet IEC and UL standards for MV system voltages

    ▪ Short circuit capability and Avalanche energy characterization of HV SiC power devices

    ▪ Converter design considerations

    ▪ Performance evaluation and metrics of High power/voltage power converters

    ▪ Series connection of HV SiC power devices and its performance evaluation for High power/voltage power converters

    ▪ Module packaging of HV SiC power devices − is non-isolated module a requirement for High Voltage power converters

• Application examples and performance of MV SiC power converters

    ▪ SST (Solid State Transformer) with 15kV SiC IGBTs grid tied at MV

    ▪ SST with 10kV MOSFETs grid tied at MV for Navy shipboard applications

    ▪ MV 10kV SiC MOSFET converter for high speed (with high fundamental frequency) MV rated motor drives

    ▪ SST with RB Reverse Blocking) SiC MOSFET with MV grid tie

    ▪ SST for railway traction applications

    ▪ MV SiC power converters for grid tied solar applications

    ▪ MV DC-DC converters for DC grid

• Roadmap for HV SiC power devices

    ▪ Cost targets and projections based on DOE PowerAmerica Institute for WBG power devices based power electronics commercialization

    ▪ Module packaging − challenges, thermal management, standardization of modules, volume production, and multiple sourcing of modules

• Magnetics for High Power Converters
This tutorial will highlight the latest advances in magnetic material qualification and characterization.


Biography



Subhashish Bhattacharya received his PhD from University of Wisconsin-Madison in 2003. He worked in the FACTS and Power Quality group at Westinghouse R&D Center in Pittsburgh, which later became part of Siemens Power Transmission & Distribution, from 1998 to 2005. He has been involved in several large FACTS projects, including the NY Power Authority (NYPA) 200MVA Convertible Static Compensator project. He joined the Department of ECE at NC State University in 2005, where he is Duke Energy Distinguished Professor, founding faculty member of NSF ERC FREEDM Systems center (www.freedm.ncsu.edu), and DOE initiative on WBG based Manufacturing Innovation Institute − PowerAmerica (www.poweramericainstitute.org). He has authored over 500 peer-reviewed technical articles, 3 book chapters, and has 5 issued patents. York International Corporation (now Johnson Controls) commercialized a part of his PhD research on active power filters for their air-conditioner chiller application. His research interests are Solid-State Transformers, MV power converters, FACTS, Utility applications of power electronics and power quality issues; highfrequency magnetics, active filters, and application of new power semiconductor devices such as SiC for converter topologies. He has presented several IEEE tutorials in the area of SiC based MV Power Conversion Systems, including at ECCE 2019, 2018, 2017, and others.

Relevant publications:

Dr. Bhattacharya’s paper in IEEE Spectrum “Transforming the transformer” [July 2017] chronicles his SST contributions. Some key SST papers:

    • “Solid-State Transformer and MV Grid Tie Applications Enabled by 15kV SiC IGBTs and 10kV SiC MOSFETs Based Multilevel Converters”, IEEE Transactions on IA, 2015.

    • “Harmonic Analysis and Controller Design of 15kV SiC IGBT-Based Medium-Voltage GridConnected Three-Phase Three-Level NPC Converter”, IEEE Transactions on Power Electronics, 2017.

    • “Comparative Evaluation of 15-kV SiC MOSFET and 15-kV SiC IGBT for Medium-Voltage Converter Under the Same dv/dt Conditions”, IEEE JESTPE, 2017

    • “Gate Drivers for Medium-Voltage SiC Devices”, IEEE JESTPE, 2021.

    • “Analysis and Design Considerations of a Contactless Magnetic Plug for Charging Electric Vehicles Directly From the Medium-Voltage DC Grid With Arc Flash Mitigation”, IEEE JESTIE, 2020