BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:America/Chicago BEGIN:DAYLIGHT DTSTART:20250309T030000 TZOFFSETFROM:-0600 TZOFFSETTO:-0500 RRULE:FREQ=YEARLY;BYDAY=2SU;BYMONTH=3 TZNAME:CDT END:DAYLIGHT BEGIN:STANDARD DTSTART:20241103T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0600 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=11 TZNAME:CST END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20250120T181552Z UID:3C2A35BD-7CEB-4C37-8BA3-6047158D5DF8 DTSTART;TZID=America/Chicago:20250114T170000 DTEND;TZID=America/Chicago:20250114T183000 DESCRIPTION:This talk will focuse on three-stage (MV/HF DC-DC/LV) CHB-based Solid State Transformer (SST) technology-based architecture for both grid integration and motor drive applications. The research focuses on develop ing advanced control strategies to enhance the performance of SST applicat ions. They are mainly wind and solar farms\, data centers\, microgrids\, E V charging stations\, and propulsion drives. SST technology is becoming th e most attractive solution for direct integration of MVAC grid with LVAC/L VDC grid. It offers high power density with advanced grid support\, which is not possible with conventional Low-Frequency Transformer (LFT) based so lution. This work addresses the associated challenges\, including control complexity\, power quality issues\, and higher semiconductor losses in MV stage of CHB-based SST for aforementioned applications.\n\nThe MV grid-con nected SST introduces power quality issues (poor current THD) due to the d ead time effect and harmonics present in grid voltage. The power quality i ssues\, especially at light load conditions are more significant. A novel hybrid control technique is proposed to ensure perfectly sinusoidal MV gri d current even under light load conditions\, resulting in improved grid cu rrent THD. Experimental validation using a 1.2kV(MV)/400V(DC)/200V(AC)\, 2 0kW CHB-based SST prototype demonstrates the effectiveness of this approac h. The proposed hybrid control technique is further extended to address th e trade-off between cost and performance of the SST that explores a cost-e ffective alternative utilizing both Si-IGBTs and SiC MOSFETs in the MV sta ge. The extended hybrid control approach simultaneously improves semicondu ctor losses (nearly 50 %) as well as power quality with higher effective s witching frequency.\n\nSST technology holds immense potential for next-gen eration MV motor drive applications\, particularly in marine propulsion sy stems\, because the lighter and compact electric drive is the preferred ch oice in this application. This work also proposes a modified CHB-based SST -fed high-frequency propulsion drive with a new modulation technique. The proposed drive offers high power density and achieves a higher effective s witching frequency with reduced semiconductor losses. It is validated in a 7-level modified CHB-based SST-fed field-oriented controlled induction mo tor drive prototype. To further enhance the reliability of variable speed drives\, this research also addresses their sensitivity to power supply di sturbances. A simple and cost-effective regenerative ride-through techniqu e is proposed for CHB inverter-based vector-controlled induction motor dri ves\, ensuring smooth operation during power interruptions or voltage sag. This improves overall system resilience.\n\nSpeaker(s): Himanshu Patel\, \n\nVirtual: https://events.vtools.ieee.org/m/453721 LOCATION:Virtual: https://events.vtools.ieee.org/m/453721 ORGANIZER:ahmed.t.elsayed@boeing.com SEQUENCE:9 SUMMARY:Cascaded H-Bridge Based Solid State Transformer (SST) Technology fo r Grid and Motor Drive Applications URL;VALUE=URI:https://events.vtools.ieee.org/m/453721 X-ALT-DESC:Description: <br /><p class="MsoNormal" style="text-align: justi fy\;"><span lang="EN-IN" style="font-family: 'Times New Roman'\,serif\;">T his talk will focuse on three-stage (MV/HF DC-DC/LV) CHB-based Solid State Transformer (SST) technology-based architecture for both grid integration and motor drive applications. The research focuses on developing advanced control strategies to enhance the performance of SST applications. They a re mainly wind and solar farms\, data centers\, microgrids\, EV charging s tations\, and propulsion drives. SST technology is becoming the most attra ctive solution for direct integration of MVAC grid with LVAC/LVDC grid. It offers high power density with advanced grid support\, which is not possi ble with conventional Low-Frequency Transformer (LFT) based solution. This work addresses the associated challenges\, including control complexity\, power quality issues\, and higher semiconductor losses in MV stage of CHB -based SST for aforementioned applications.</span></p>\n<p class="MsoNorma l" style="text-align: justify\;"><span lang="EN-IN" style="font-family: 'T imes New Roman'\,serif\;">The MV grid-connected SST introduces power quali ty issues (poor current THD) due to the dead time effect and harmonics pre sent in grid voltage. The power quality issues\, especially at light load conditions&nbsp\;are more significant.&nbsp\;A novel hybrid control techni que is proposed to ensure perfectly sinusoidal MV grid current even under light load conditions\, resulting in improved grid current THD. Experiment al validation using a&nbsp\;1.2kV(MV)/400V(DC)/200V(AC)\, 20kW&nbsp\;CHB-b ased SST prototype demonstrates the effectiveness of this approach.&nbsp\; The proposed hybrid control technique is further extended to address the t rade-off between cost and performance of the SST that explores a cost-effe ctive alternative utilizing both Si-IGBTs and SiC MOSFETs in the MV stage. &nbsp\;The extended&nbsp\;&nbsp\;hybrid control approach simultaneously im proves semiconductor losses (nearly&nbsp\;50&nbsp\;%) as well as power qua lity with higher effective switching frequency.</span></p>\n<p class="MsoN ormal" style="text-align: justify\;"><span lang="EN-IN" style="font-family : 'Times New Roman'\,serif\;">SST technology holds immense potential for n ext-generation MV motor drive applications\, particularly in marine propul sion systems\, because the lighter and compact electric drive is the prefe rred choice in this application. This work also proposes a modified CHB-ba sed SST-fed high-frequency propulsion drive with a new modulation techniqu e. The proposed drive offers high power density and achieves a higher effe ctive switching frequency with reduced semiconductor losses. It is validat ed in a 7-level modified CHB-based SST-fed field-oriented controlled induc tion motor drive prototype.&nbsp\;To further enhance the reliability of va riable speed drives\, this research also addresses their sensitivity to po wer supply disturbances. A simple and cost-effective regenerative ride-thr ough technique is proposed for CHB inverter-based vector-controlled induct ion motor drives\, ensuring smooth operation during power interruptions or voltage sag. This improves overall system resilience.</span></p> END:VEVENT END:VCALENDAR