• Ph.D. (2014) Mechanical Engineering, Texas A&M University, College station.
• M.S. (2008) Texas A&M University, College station.
• B.Tech (2006) National Institute of Technology, Trichy.

Research Interests:

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Selected Recent Publications:

Energy Infrastructure Systems

1. S.K.K. Hari, K. Sundar, H. Nagarajan, R. Bent, S. Backhaus. Hierarchical Predictive Control Algorithms for Optimal Design and Operation of Microgrids , Power Systems Computation Conference (PSCC) - Dublin, Ireland (2018).

2. H. Nagarajan, R. Bent, P.V. Hentenryck, S. Backhaus, E. Yamangil. Resilient Transmission Grid Design: AC Relaxation vs. DC approximation , Working paper (2017).

3. K. Sundar, C. Coffrin, H. Nagarajan, R. Bent. Probabilistic N-k Failure-Identification for Power Systems , Networks, Wiley Online Library (2018).

4. K. Sundar, H. Nagarajan, L. Roald, S. Misra, R. Bent, D. Bienstock. A Modified Benders Decomposition for Chance-Constrained Unit Commitment with N-1 Security and Wind Uncertainty , Working paper (2017).

5. M. Lu, H. Nagarajan, E. Yamangil, R. Bent, S.Backhaus. Optimal Transmission Line Switching under Geomagnetic Disturbances , IEEE Transactions on Power Systems (2017).

6. S.C. Madathil, E. Yamangil, H. Nagarajan, A. Barnes, R. Bent, S.Backhaus, S.J.Mason, S.Mashayekh, M.Stadler. Resilient Off-grid Microgrids: Capacity Planning and N-1 Security , IEEE Transactions on Smart Grids (2017).

7. S. Mashayekh, M. Stadler, G. Cardoso, M. Heleno, S.C. Madathil, H. Nagarajan, R. Bent, M. Mueller-Stoffels, X. Lu and J. Wang. Security-Constrained Design of Isolated Multi-Energy Microgrids , IEEE Transactions on Power Systems (2017).

8. D. Deka, H. Nagarajan, S. Backhaus. Optimal Topology Design for Disturbance Minimization in Power Grids , American Control Conference (ACC), Seattle, USA (2017).

9. H. Nagarajan, E. Yamangil, R. Bent, S. Backhaus, P.V. Hentenryck. Optimal Resilient Transmission Grid Design , Power Systems Computation Conference (PSCC)- Genoa, Italy (2016).

10. K. Sundar, H. Nagarajan, M. Lubin, L. Roald, S. Misra, R. Bent, D. Bienstock. Unit Commitment with N-1 Security and Wind Uncertainty , Power Systems Computation Conference (PSCC)- Genoa, Italy (2016).

Nonlinear Programming

1. H. Nagarajan, K. Sundar, H. Hijazi, R. Bent. Convex Hull Formulations for Mixed-Integer Multilinear Functions , 15th International Conference on the Integration of Constraint Programming, Artificial Intelligence, and Operations Research (Submitted) (2018).

2. M. Lu, H. Nagarajan, R. Bent, S.D. Eksioglu, S.J. Mason. Tight Piecewise Convex Relaxations for Global Optimization of Optimal Power Flow , Power Systems Computation Conference (PSCC) - Dublin, Ireland (2018).

3. H. Nagarajan, M. Lu, S. Wang, R. Bent, K. Sundar. An Adaptive, Multivariate Partitioning Algorithm for Global Optimization of Nonconvex Programs , Journal of Global Optimization (Under review) (2017).

4. F. Wu, H. Nagarajan, A. Zlotnik, R. Sioshansi. Adaptive Convex Relaxations for Gas Pipeline Network Optimization , American Control Conference (ACC), Seattle, USA (2017).

5. H. Nagarajan, M. Lu, E. Yamangil, R. Bent. Tightening McCormick Relaxations for Mixed-Integer Nonlinear Programs via Dynamic Multivariate Partitioning , Proceedings of the International Conference on Principles and Practice of Constraint Programming, Toulouse, France (2016).

Network Robustness and Control

1. H. Nagarajan, P.R. Pagilla, S.Darbha, R. Bent, P.P. Khargonekar. Optimal Configurations to Minimize Disturbance Propagation in R2R Networks , American Control Conference (ACC), Seattle, USA. (2017).

2. H. Nagarajan, S. Rathinam, S. Darbha. On maximizing algebraic connectivity of networks for various engineering applications , European Control Conference (ECC), Linz, Austria. (2015).

3. H. Nagarajan, P. Wei, S. Rathinam, D.Sun. Heuristics for Synthesizing Robust Networks with a Diameter Constraint, Mathematical Problems in Engineering. 2014, Article ID 326963 (2014).

4. H. Nagarajan, S. Rathinam, S. Darbha, K.R.Rajagopal. Algorithms for synthesizing mechanical systems with maximal natural frequencies, Nonlinear Analysis: Real World Applications. 15, 2154-2162 (2012).

5. H. Nagarajan, S. Rathinam, S. Darbha, K.R.Rajagopal. Algorithms for finding diameter-constrained graphs with maximum algebraic connectivity, Dynamics of Information Systems: Mathematical Foundations. 2014, 121-135 (2012).

6. H. Nagarajan, S. Rathinam, S. Darbha, K.R.Rajagopal. Synthesizing robust communication networks for UAVs , American Control Conference (ACC). 3730 - 3735 (2012).

Convex Optimization in Computational Mechanics

1. K.B. Nakshatrala, H. Nagarajan, M. Shabouei. A numerical methodology for enforcing maximum principles and the non-negative constraint for transient diffusion equations, Communications in Computational Physics. (Accepted 2015).

2. H. Nagarajan, K.B.Nakshatrala. Enforcing the non-negativity constraint and maximum principles for diffusion with decay on general computational grids, International Journal for Numerical Methods in Fluids. 67, 820-847 (2011).