BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:Europe/Zurich BEGIN:DAYLIGHT DTSTART:20190331T030000 TZOFFSETFROM:+0100 TZOFFSETTO:+0200 RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=3 TZNAME:CEST END:DAYLIGHT BEGIN:STANDARD DTSTART:20181028T020000 TZOFFSETFROM:+0200 TZOFFSETTO:+0100 RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10 TZNAME:CET END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20191023T151510Z UID:4F038920-1133-469A-9402-0ADAEB90E999 DTSTART;TZID=Europe/Zurich:20190115T110000 DTEND;TZID=Europe/Zurich:20190115T121500 DESCRIPTION:High Voltage DC (HVDC) transmission is a long-standing technolo gy with many installations around the world. Over the past few years\, sig nificant breakthroughs in the voltage-sourced converter technology have ma de the HVDC technology even more promising in providing enhanced reliabili ty and functionality and reducing cost and power losses. Concomitantly\, s ignificant changes in generation\, transmission\, and loads such as (i) in tegration and tapping renewable energy generation in remote areas\, (ii) n eed for relocation or bypassing older conventional and/or nuclear power pl ants\, (iii) increasing transmission capacity\, and (iv) urbanization and the need to feed the large cities have emerged. These new trends have call ed for Multi-Terminal DC (MTDC) systems\, which when embedded inside the A C grid\, can enhance stability\, reliability\, and efficiency of the prese nt power grid. The strategic importance of MTDC grids is evidenced by the number of worldwide projects currently in their advanced planning stage\, e.g.\, European “Supergrids” and the Baltic Sea project along with a f ew projects in China and USA.\n\nAmid the optimism surrounding the benefit s of MTDC grids\, their protection against DC-side faults remains one of t heir major technical challenges. MTDC grid protection is far more difficul t than AC grids as DC fault phenomenon is more complex. The protection phi losophy of the MTDC grids\, nevertheless\, is similar to the AC counterpar ts in the sense that both primary and backup protection schemes are requir ed. Upon occurrence of a DC fault\, the recently emerged hybrid DC circuit breakers (CBs) need to selectively and quickly isolate any faulty line wi thout interrupting the entire system. However\, incorporating such DC CBs into the MTDC grid adds another level of complexity as the DC short circui t current increases with commensurate increase in transient overvoltage. T his presentation is focused on addressing the aforementioned challenges as sociated with several protection aspects of the MTDC grids. At the end\, a n overview of the speaker’s current research activities on utility-scale power electronics based on emerging wide-band-gap semiconductor devices w ill be also presented.\n\nSpeaker(s): Prof. Maryam Saeedifard\, \n\nEPFL\, Station 11\, Lausanne\, Switzerland\, Switzerland\, 1015 LOCATION:EPFL\, Station 11\, Lausanne\, Switzerland\, Switzerland\, 1015 ORGANIZER:drazen.dujic@epfl.ch SEQUENCE:1 SUMMARY:Protection of Multi-Terminal HVDC Grids URL;VALUE=URI:https://events.vtools.ieee.org/m/191201 X-ALT-DESC:Description: <br /><p>High Voltage DC (HVDC) transmission is a l ong-standing technology with many installations around the world. Over the past few years\, significant breakthroughs in the voltage-sourced convert er technology have made the HVDC technology even more promising in providi ng enhanced reliability and functionality and reducing cost and power loss es. Concomitantly\, significant changes in generation\, transmission\, and loads such as (i) integration and tapping renewable energy generation in remote areas\, (ii) need for relocation or bypassing older conventional an d/or nuclear power plants\, (iii) increasing transmission capacity\, and ( iv) urbanization and the need to feed the large cities have emerged. These new trends have called for Multi-Terminal DC (MTDC) systems\, which when embedded inside the AC grid\, can enhance stability\, reliability\, and ef ficiency of the present power grid. The strategic importance of MTDC grids is evidenced by the number of worldwide projects currently in their advan ced planning stage\, e.g.\, European &ldquo\;Supergrids&rdquo\; and the Ba ltic Sea project along with a few projects in China and USA.</p>\n<p>Amid the optimism surrounding the benefits of MTDC grids\, their protection aga inst DC-side faults remains one of their major technical challenges. MTDC grid protection is far more difficult than AC grids as DC fault phenomenon is more complex. The protection philosophy of the MTDC grids\, neverthele ss\, is similar to the AC counterparts in the sense that both primary and backup protection schemes are required. Upon occurrence of a DC fault\, th e recently emerged hybrid DC circuit breakers (CBs) need to selectively an d quickly isolate any faulty line without interrupting the entire system. However\, incorporating such DC CBs into the MTDC grid adds another level of complexity as the DC short circuit current increases with commensurate increase in transient overvoltage. This presentation is focused on address ing the aforementioned challenges associated with several protection aspec ts of the MTDC grids. At the end\, an overview of the speaker&rsquo\;s cur rent research activities on utility-scale power electronics based on emerg ing wide-band-gap semiconductor devices will be also presented.</p> END:VEVENT END:VCALENDAR