Kiran Kumar Challa

My doctoral research focuses on developing experimental test-beds for smart grid research and estimation of power plant parameters. As a part of developing the experimental test-bed, We focused on modeling and designing critical power systems components like generators, governor-turbines, substations, and transmission lines. Modeling of generators in my research is according to the NREL modeling notifcations. We have designed substation models in our laboratory with detailed protection functionalities and measurement devices as per the design of extra high voltage (400 kV to 1200 kV) substations in the power industry. We have also done modeling and experimental prototype design of frequency-dependent transmission lines according to the conductor and tower design instead of line impedances. Along with these experimental developments, We have proposed an estimation methodology to estimate the power plant parameters (generator and excitation parameters) from the digital relay records.

Graphical Abstract of Doctoral Research

Figure:Graphical Abstract of Doctoral Research

Field of interest: State and parameter estimation, Emulation of power system components.

  1. Gurunath Gurrala, Kiran Kumar Challa, K.B. Rajesh "Development of a Generalized Scaled-Down Realistic Substation Laboratory Model for Smart Grid Research and Education in IEEE Access , vol. 10, pp. 5424-5439 (Jan 2022)
  2. Kiran Kumar Challa and Gurunath Gurrala, Comparison of vector and matrix format tangential interpolation for FDNE, in Electric Power Systems Research, Volume:197,Pages:107345 (August 2021)
  3. Kiran Kumar Challa and Gurunath Gurrala, Development of an Experimental Scaled-Down Frequency Dependent Transmission Line Model, in IEEE Access , vol. 9, pp. 64639-64652 (April 2021)
  4. Kiran Kumar Challa, Gurunath Gurrala and Pritam Mukherjee, An algorithm for fitting passive equivalent circuits for lumped parameter frequency dependent transmission line models, in IET Gener Transm Distrib. Volume:15, Issue:15, Pages:2226-2239 (August 2021)
  5. Kiran Kumar Challa and Gurunath Gurrala, Dynamic State and Parameter Estimation of Synchronous Generator from Digital Relay Records, in Electric Power Systems Research, Volume:189, Page:106743 (August 2020)
  6. K. K. Challa and G. Gurrala, Scaled-Down Model of WECC 3-Machine 9-Bus System with Frequency-Dependent Lines 9th International Conference on Power and Energy Systems (ICPES) 2019, Perth, Australia.
  7. G. Gurrala, P. Mukherjee, and K. K. Challa, Reduced Order Model of A Lumped Parameter Frequency Dependent Transmission Line 9th International Conference on Power and Energy Systems (ICPES) 2019, Perth, Australia.
  8. Gurunath Gurrala, Aeishwarya Baviskar, Kiran Kumar Challa, "An Intuitive approach to fit a frequency dependent equivalent circuit for a transmission line models 20th National Power System Conference, Thirucharapalli, India, 2018

Tanmay Mishra

Development of static excitation system with time constant regulator and various excitation system limiters for micro-alternator.

Currently trying to emulate various excitation system model using developed buck converter based excitation system

Development of low cost Digital Fault Recorder (DFR) based on FPGA platform.


Figure: system diagram


Figure: Block diagram of excitation system model


Figure: Hardware setup of excitation system model

Field of interest: Source/Generator emulation in Power system

  1. T. Mishra and G. Gurrala, Emulation of IEEE Excitation System Models Using Micro-Alternator’s Excitation System, 2020 IEEE 29th International Symposium on Industrial Electronics (ISIE), Delft, Netherlands, 2020, pp. 845-850
  2. T. Mishra and G. Gurrala, Design and Implementation of IGBT based Static Excitation System with Buck Converter, 2018 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), Chennai, India, 2018, pp. 1-6.

Francis C Joseph

Development of Next-Gen Energy Management Systems

Currently working on scheduling of Transient Stability cases based on method and task parallelization

Development of Power Quality Analyser on many core architecture platform

Field of interest: Parallelziation of Power Systems Algorithms; Development of low cost embedded systems for Edge computing in power systems

  1. Ashish Joglekar , Gurunath Gurrala , Puneet Kumar , Francis C. Joseph , T. S. Kiran , K. R. Sahasranand , and Himanshu TyagiOpen-Source Heterogeneous Constrained Edge-Computing Platform for Smart Grid Measurements, in IEEE Transactions on Instrumentation and Measurement,Volume:70, Pages:1-12 (May 2021)
  2. K. Saxena, G. Gurrala, F. C. Joseph and B. R. Teja, Symbolic Dynamic Filtering for Online Power Quality Anomaly Detection, 2020 IEEE Power & Energy Society General Meeting (PESGM), Montreal, QC, 2020, pp. 1-5
  3. F. C. Joseph and G. Gurrala, Scalability of Parareal for Large Power Grid Simulations, 20th International Conference on Parallel and Distributed Computing, Applications and Technologies (PDCAT) 2019, Gold Coast, Australia.

Durvesh Kalke

1. Tuning of IEEE defined (Std. 421.5) Power System Stabilizers

2. Effect of contingencies in power system network on synchronous generator control parameters.

3. Developing a 3 machine test system in a laboratory for validating power system control algorithms.

Vibhuti Sahu

I am currently working on "Blackout Look Ahead Simulation Tool Development", a project funded by National Supercomputing Mission, a joint mission by Department of Science and Tech-nology (DST) and Department of Electronics and Information Technology (DeitY)

My workplan includes:

• Analysis of the requirements for the modelling of power system components. • Selection and development of the models for power system components such as relay, load, transmission line and sources. • Development of algorithm for time-domain simulation. • Design of schema for DBMS considering the algorithm developed and models selected. • Development of parallel solvers. • Development and testing of the software