Venkataramana Ajjarapu

Title(s):

Thomas M. Whitney Professor of Electrical Engineering

Office

1122 Coover
2520 Osborn Dr.
Ames, IA 500111046

Information

Education

PhD, Electrical Engineering, University of Waterloo (1986)

MTech, Electrical Engineering, Indian Institute of Technology, Knapur (1982)

BTech, Electrical Engineering, Jawaharlal Nehru Technological University, Kakinada,  (1979)

Research Interests

Core Area(s): Systems and controls, electric power and energy systems, power system security, voltage stability, wind and solar energy integration, real-time control of power and power electronics systems, distributed resources impact on electric grid

Department’s Strategic Area(s): Energy infrastructure; data, decisions, network & autonomy

Publications

Google Scholar Profile: https://scholar.google.com/citations?user=_2Avr8oAAAAJ&hl=en

  • Alok Kumar Bharati, Venkataramana Ajjarapu, Wei Du, and Yuan Liu, “ Role of Distributed Inverter-Based-Resources in Bulk Grid Primary Frequency Response through HELICS based SMTD Co-Simulation , IEEE Systems Journal, Vol 17, No.1, pp. 1071-1082, March 2023
  • Singhal, A. K. Bharati, V. Ajjarapu, “Deriving DERs VAR-Capability Curve at TSO-DSO Interface to Provide Grid Services”  IEEE Transactions in Power Systems, Vol.38, No.2 , pp. 1820-1833,  March 2023
  • Amarsagar Reddy Ramapuram Matavalam,  Kishan Prudhvi Guddanti, Yang Weng and Venkataramana Ajjarapu, “Curriculum Based Reinforcement Learning of Grid Topology Controllers to Prevent Thermal Cascading” , Vol.38, N0.5 , pp. 4206-4220, IEEE Transactions on  Power Systems , September 2023
  • Ramapuram-Matavalam, S. M. H. Rizvi, A. Srivastava and V. Ajjarapu, “Critical Comparative Analysis of Measurement based Centralized Online Voltage Stability Indices,” in IEEE Transactions on Power Systems, Vol.37, No.6, pp. 4618-4629, November 2022
  • R. R. Matavalam, U. Vaidya and V. Ajjarapu, “Propagating Uncertainty in Power System Initial Conditions Using Data-Driven Linear Operators,” in IEEE Transactions on Power Systems, ,” in IEEE Transactions on Power Systems, Vol.37, No.5, pp. 4125-4128, September 2022
  • Sharma, V. Ajjarapu and U. Vaidya, “Data-driven Identification of Nonlinear Power System Dynamics Using Output-only Measurements,” in IEEE Transactions on Power Systems, Vol.37, No.5, pp. 3458-3468, September 2022
  • K. Bharati and V. Ajjarapu, “SMTD Co-Simulation Framework With HELICS for Future-Grid Analysis and Synthetic Measurement-Data Generation,” in IEEE Transactions on Industry Applications, vol. 58, no. 1, pp. 131-141, Jan.-Feb. 2022
  • Hatziargyriou, J.V. Milanovic, C. Rahmann, V. Ajjarapu et all “ Definition and Classification of Power System Stability Revisited & Extended “  IEEE Transactions on Power systems, Vol. 36, No. 4, 3371-3381, 2021
  • Alok Kumar Bharati and V. Ajjarapu “Investigation of Relevant Distribution System Representation with DG for Voltage Stability Margin Assessment” IEEE Transactions on Power Systems, Vol. 35, No. 3, pp. 2072-2081, May 2020
  • Amarsagar R. Matavalam, Ankit Singhal and V. Ajjarapu “Monitoring Long Term Voltage Instability due to Distribution & Transmission Interaction using Unbalanced µPMU & PMU Measurements” IEEE transactions on Smart Grid, Vo. 11, No.1, pp. 873-883, January 2020
  • Amarsagar R. Matavalam and V. Ajjarapu, “PMU based Monitoring and Mitigation of Delayed Voltage Recovery using Admittances” IEEE Transactions on Power Systems, Vol.34, No.6, pp. 4451-4463, November 2019
  • Venkatraman, S. Khaitan and V. Ajjarapu” Dynamic Co-Simulation Methods for Combined Transmission –Distribution System with Integration Time Step Impact on Convergence, IEEE transaction on Power systems, Vol. 34, No. 2, pp. 1171-1181, 2019

Primary Strategic Research Area

Energy Systems

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