IEEE Schenectady Section


Frequency Support among Asynchronous AC Grids through Multiterminal DC Grid – May 30, 2019

It is envisaged that Multiterminal DC (MTDC) grid will be a key cornerstone of the sustainable future of our planet. The presentation, which can be downloaded here, identified some of the key challenges facing DC grid systems and focus on the frequency support issue among AC grids interconnected by the DC network.

TOPIC:  Frequency Support among Asynchronous AC Grids through Multiterminal DC Grid

ABSTRACT: Multiterminal DC (MTDC) grids are planned in and around Europe to integrate significant amount of offshore wind energy and onshore solar energy to the Pan-European AC grid and two pilot MTDC projects are already operational in China. AC grids interconnected by the DC network are ‘asynchronous’ in nature, and as a result, they do not have a natural way of exchanging frequency support. Since in each AC area the inertia is progressively reducing due to replacement of conventional generation by inverter-interfaced renewables, they are experiencing deeper frequency nadir and higher rate-of-change-of-frequency following a generation loss, which can lead to under frequency load shedding issues among others. The talk will briefly touch upon modeling of such AC-MTDC systems and will then delve deeper into the control challenges of such grids in providing exchange of frequency support in a controlled manner. The viability of a new ratio-based inertial and primary frequency support framework that has the promise for a new market mechanism in future will be demonstrated.

PRESENTED BY: Dr Nilanjan Ray Chaudhuri


DATE and TIME: May 30th, 2019, Thursday, 12 to 1:00 PM

LOCATION: Niskayuna Reformed Church Room, 3041 Troy Schenectady Rd, Niskayuna, NY 12309

SPONSORED BY: IEEE Computational Intelligence Society and IEEE Control System Society, IEEE Schenectady Section

LUNCH: Lunch will be provided.


Please contact Supriya Tawde, at by Wednesday, May 29th, 2019 to reserve. This event is free for IEEE members.  There is a $10 fee for non-members.


Nilanjan Ray Chaudhuri received his Ph.D. degree from Imperial College London, London, UK in 2011 in Power Systems. From 2005-2007, he worked in General Electric (GE) John F. Welch Technology Center. He came back to GE and worked in GE Global Research Center, NY, USA as a Lead Engineer during 2011-2014. Presently, he is an Assistant Professor with the School of Electrical Engineering and Computer Science at Penn State, University Park, PA. He was an Assistant Professor with North Dakota State University, Fargo, ND, USA during 2014-2016. He is a member of the IEEE and IEEE PES. Dr. Ray Chaudhuri is the lead author of the book Multi-terminal Direct Current Grids: Modeling, Analysis, and Control (Wiley/IEEE Press, 2014), and an Associate Editor of the IEEE TRANSACTIONS ON POWER DELIVERY and IEEE PES LETTERS. Dr. Ray Chaudhuri was the recipient of the National Science Foundation Early Faculty CAREER Award in 2016.