# Konstantin "Kostya" Turitsyn

Assistant Professor

Massachusetts Institute of Technology Department of Mechanical Engineering 77 Massachusetts Ave, 3-336 Phone: +1-(617)-858-1282 E-mail: turitsyn@mit.eduAssistant Professor

Massachusetts Institute of Technology Department of Mechanical Engineering 77 Massachusetts Ave, 3-336 Phone: +1-(617)-858-1282 E-mail: turitsyn@mit.eduModern power systems are protected against failures of any individual component (N-1 security), so blackouts are usually triggered by simultaneous failures of at least 2 components (N-2 contingency). Identification of dangerous N-2 contingencies is very challenging due to large number of possible pairs of lines and generators.

We invented a unique filtering technique for selection of dangerous contigencies that allows fast screening of safe scenarios with zero missing rate guarantees. On medium sized models the algorithm leads to thousand fold acceleration of the selection process and allows real-time blackout risk assessment.

Hawaii International Conference on System Sciences (HICSS)

(2014)

IEEE Power and Energy Society General Meeting

(2013)

Hawaii International Conference on System Sciences (HICSS)

(2013)

Direct energy methods are the only alternative to simulations for transient stability analysis and are currently used by a number of system operators around the world. Despite many decades of research these methods still rely on NP-hard algorithms and cannot be applied directly to standard models.

We proposed an alternative approach based on more general Lyapunov functions.This technique is based solely on convex optimization algorithms, extends to wider range of models, and is less conservative in comparison to classical energy methods.

IEEE Transactions on Power Systems 99, 1--9

(2015)

IEEE Power and Energy Society General Meeting

(2015)

American Control Conference

(2015)

Heavily loaded grids may experience a voltage instability resulting in blackout in most dramatic scenarios. Stability margin of safe operating points depends on the dynamic response of the loads that are difficult to model due to inherent uncertainty and lack of observability.

To address this problem, we developed novel robust stability certificates based on structured Lyapunov functions. These certificates provide mathematical guarantees that an operating point is stable for any load response. Safe regions identified with the approach can be naturally used for security assessment and emergency control.

IEEE Transactions on Power Systems 99, 1--16

(2015)

High penetration levels of distributed generation may result in reversal of power flow in modern distribution grids. We have shown that reversed power flow may result in appearance of new previously unobserved operating equilibria.

The resulting solutions are generally low-voltage and undesirable for normal operation. However, the system may get trapped in those conditions during the post-fault recovery. We have proposed new algorithms for identification of all the solutions, as well as special emergency control actions that can help maintain stability and enable adoption of high levels of clean renewable energy.

Voltage Multistability and Pulse Emergency Control for Distribution System With Power Flow Reversal,

IEEE Transactions on Smart Grid 99, 1--1

(2015)

arXiv:1408.2732v1

(2014)

IEEE Power and Energy Society General Meeting

(2014)

Simulations are still the main approach for verification of system stability in emergency situations. However, simulations of large-scale models are costly, and most of the computationaltime is wasted on verification of thousands of non-critical contingencies.

We develop an alternative approach based on Lyapunov functions and reachability certificates constructed via semi-definite programming approaches. Resulting techniques allow exceptionally fast screening of most cleared fault contingencies even in the presence of operating point uncertainty.

arXiv:1504.04684v1

(2015)

Regions of safe and stable operating conditions are generally non-convex. Their non-trivial shape is responsible for NP-hardness of many critical decision-making processes in power systems: optimal resource allocation, risk assessment, emergency control.

We use modern analysis and optimization techniques to construct inner approximations of the feasibility sets of simple convex shape suitable for real-time computations. Resulting approximations are then used for security assessment in the presence of renewable generation, design of optimal remedial actions and other time-critical applications.

IEEE Power and Energy Society General Meeting

(2015)

...

Proceedings of the IEEE 99, 1063--1073

(2011)

IEEE International Conference on Smart Grid Communications (SmartGridComm)

(2010)

IEEE Power and Energy Society General Meeting

(2010)

...

arXiv:1506.00934v2

(2015)

IEEE International Conference on Smart Grid Communications (SmartGridComm)

(2014)

IEEE Power and Energy Society General Meeting

(2013)

...

ASME 2014 Dynamic Systems and Control Conference

(2014)

American Control Conference

(2013)

...

Proceedings of the IEEE 99, 1063--1073

(2011)

IEEE International Conference on Smart Grid Communications (SmartGridComm)

(2010)

IEEE Power and Energy Society General Meeting

(2010)

...

...

...

...

Optics Letters 37, 3600--3602

(2012)

Physical Review Letters 91, 203901

(2003)

...

Optics Communications 307, 62--66

(2013)

IEEE Journal of Lightwave Technology 30, 2494--2501

(2012)

Optics Letters 36, 4050--4052

(2011)

...

IEEE Transactions on Communications 55, 237--241

(2007)

European Conference on Optical Communication (ECOC)

(2005)

...

Physical Review Letters 100, 028103

(2008)

Physical Review Letters 99, 218101

(2007)

...

Journal of Experimental and Theoretical Physics 105, 655--664

(2007)

Journal of Fluid Mechanics 531, 251--260

(2005)

...

Physical Review Letters 103, 124501

(2009)

...

Physical Review Letters 106, 104501

(2011)

...

Journal of Turbulence 8, N16

(2007)

...

...

...

Physical Review Letters 98, 180603

(2007)

...

Physical Review E 85, 051905

(2012)

arXiv:1505.01457v1

(2015)

arXiv:1504.04684v1

(2015)

arXiv:1506.00934v2

(2015)

Voltage Multistability and Pulse Emergency Control for Distribution System With Power Flow Reversal,

IEEE Transactions on Smart Grid 99, 1--1

(2015)

IEEE Transactions on Power Systems 99, 1--16

(2015)

IEEE Transactions on Power Systems 99, 1--9

(2015)

Physical Review E 91, 022123

(2015)

Hawaii International Conference on System Sciences (HICSS)

(2015)

American Control Conference

(2015)

IEEE Power and Energy Society General Meeting

(2015)

IEEE Power and Energy Society General Meeting

(2015)

arXiv:1408.2732v1

(2014)

ASME 2014 Dynamic Systems and Control Conference

(2014)

Hawaii International Conference on System Sciences (HICSS)

(2014)

IEEE Power and Energy Society General Meeting

(2014)

IEEE International Conference on Smart Grid Communications (SmartGridComm)

(2014)

Optics Communications 307, 62--66

(2013)

American Control Conference

(2013)

IEEE Power and Energy Society General Meeting

(2013)

IEEE Power and Energy Society General Meeting

(2013)

Hawaii International Conference on System Sciences (HICSS)

(2013)

Physical Review E 85, 051905

(2012)

Optics Letters 37, 3600--3602

(2012)

Journal of Statistical Physics 147, 424--435

(2012)

IEEE Journal of Lightwave Technology 30, 2494--2501

(2012)

IEEE Annual Conference on Decision and Control (CDC)

(2012)

Physical Review Letters 106, 104501

(2011)

Optics Letters 36, 4050--4052

(2011)

Proceedings of the IEEE 99, 1063--1073

(2011)

IEEE Power and Energy Society General Meeting

(2011)

IEEE Annual Conference on Decision and Control (CDC)

(2011)

arXiv:1006.0158v1

(2010)

Journal of Statistical Physics 140, 819--845

(2010)

IEEE International Conference on Smart Grid Communications (SmartGridComm)

(2010)

IEEE Power and Energy Society General Meeting

(2010)

IEEE International Conference on Smart Grid Communications (SmartGridComm)

(2010)

Physical Review Letters 103, 124501

(2009)

Physical Review Letters 100, 028103

(2008)

Journal of Turbulence 8, N16

(2007)

Physical Review Letters 99, 218101

(2007)

IEEE Transactions on Communications 55, 237--241

(2007)

Physical Review Letters 98, 180603

(2007)

Journal of Experimental and Theoretical Physics 105, 655--664

(2007)

Journal of Fluid Mechanics 531, 251--260

(2005)

European Conference on Optical Communication (ECOC)

(2005)

Journal of Experimental and Theoretical Physics 98, 348--351

(2004)

Physical Review E 67, 062102

(2003)

Physical Review Letters 91, 203901

(2003)

Journal of Experimental and Theoretical Physics 94, 1193--1200

(2002)