Research Abstract

The system integration of any kind of new power equipment requires testing the system under various operational scenarios, to assure that the system works as planned. This is usually done by pure simulations, mainly due to the fact that real experiments have the issues of costs, safety, and feasibility. However, with the Power-Hardware-in-the-Loop technology, these issues have been resolved and with this technology, actual hardware can be tested under real conditions. The EnergyLab 2.0 project aims for a Power-Hardware-in-the-Loop test facility of 1 MVA in order to investigate the behavior of new technologies and new network structures. The aim of my work is to develop real-time simulation models and perform Power-Hardware-in-the-Loop testing on most novel energy storage systems to be connected to the distribution network.

Research Interests

Energy Storage Systems
Power-Hardware-in-the-Loop Simulation
Power Systems Dynamics and Control
Power Systems Analysis

Publications

Power Management of Hybrid Flywheel-Battery Energy Storage Systems Considering the State of Charge and Power Ramp Rate
Maroufi, S. M.; Karrari, S.; Rajashekaraiah, K.; Carne, G. D.
2025. IEEE Transactions on Power Electronics, 40 (7), 9944–9956. doi:10.1109/TPEL.2025.3546013

Adaptive droop control strategy for Flywheel Energy Storage Systems: A Power Hardware-in-the-Loop validation
Karrari, S.; Carne, G.; Noe, M.
2022. Electric Power Systems Research, 212, Art.-Nr.: 108300. doi:10.1016/j.epsr.2022.108300

Supercapacitor modelling for real-time simulation applications
Carne, G.; Morandi, A.; Karrari, S.
2022. IEEE Journal of Emerging and Selected Topics in Industrial Electronics, 3 (3), 509–518. doi:10.1109/JESTIE.2022.3165985

Sizing of Hybrid Energy Storage Systems using Recurring Daily Patterns
Karrari, S.; Ludwig, N.; Carne, G.; Noe, M.
2022. IEEE Transactions on Smart Grid, 13 (4), 3290–3300. doi:10.1109/TSG.2022.3156860

On Modeling Depths of Power Electronic Circuits for Real-Time Simulation – A Comparative Analysis for Power Systems
Carne, G.; Lauss, G.; Syed, M. H.; Monti, A.; Benigni, A.; Karrari, S.; Kotsampopoulos, P.; Faruque, M. O.
2022. IEEE open access journal of power and energy, 9, 76–87. doi:10.1109/OAJPE.2022.3148777

Validating Inertia Emulation Controllers using Rapid Control Prototyping and PHIL Testing
Karrari, S.
2021, September 17. 13th OPAL-RT’s real-time simulation conference (RT 2021), Online, September 16–17, 2021

Integration of Flywheel Energy Storage Systems in Low Voltage Distribution Grids. PhD dissertation
Karrari, S.
2023. KIT Scientific Publishing. doi:10.5445/KSP/1000139457

Model validation of a high-speed flywheel energy storage system using power hardware-in-the-loop testing
Karrari, S.; Carne, G.; Noe, M.
2021. Journal of energy storage, 43, Art.-Nr.: 103177. doi:10.1016/j.est.2021.103177

Integration of Flywheel Energy Storage Systems in Low Voltage Distribution Grids. PhD dissertation
Karrari, S.
2021, July 13. Karlsruher Institut für Technologie (KIT). doi:10.5445/IR/1000135181

Power Hardware In the Loop infrastructure at KIT
Hubschneider, S.; Waczowicz, S.; Wiegel, F.; Karrari, S.; Sousa, W. T. B. de; Carne, G. de; Geisbüsch, J.; Hiller, M.; Leibfried, T.; Hagenmeyer, V.; Noe, M.
2020, June 18. RT20: Opal-RT’s 12th Conference on Real-Time Simulation (2020), Online, June 18, 2020

A Data-driven Approach for Estimating Relative Voltage Sensitivity
Karrari, S.; Vollmer, M.; Carne, G.; Noe, M.; Böhm, K.; Geisbüsch, J.
2020. IEEE Power & Energy Society General Meeting (PESGM 2020), 1–5, Institute of Electrical and Electronics Engineers (IEEE). doi:10.1109/PESGM41954.2020.9281859

Deployment of a Resistive Superconducting Fault Current Limiter for Improvement of Voltage Quality and Transient Recovery Voltage
De Sousa, W. T. B.; Kottonau, D.; Karrari, S.; Geisbusch, J.; Noe, M.
2021. IEEE transactions on applied superconductivity, 31 (1). doi:10.1109/TASC.2020.3016460

Adaptive inertia emulation control for high-speed flywheel energy storage systems
Karrari, S.; Baghaee, H. R.; Carne, G.; Noe, M.; Geisbuesch, J.
2020. IET generation, transmission and distribution, 14 (22), 5047–5059. doi:10.1049/iet-gtd.2020.0066

Privacy Measures and Storage Technologies for Battery-Based Load Hiding - an Overview and Experimental Study
Arzamasov, V.; Schwerdt, R.; Karrari, S.; Böhm, K.; Nguyen, T. B.
2020. e-Energy ’20: Proceedings of the Eleventh ACM International Conference on Future Energy Systems, Melbourne, Australia, 22 - 26 June 2020, 178–195, Association for Computing Machinery (ACM). doi:10.1145/3396851.3398320

Cooperative Fault-Tolerant Control of Microgrids under Switching Communication Topology
Afshari, A.; Karrari, M.; Baghaee, H. R.; Gharehpetian, G. B.; Karrari, S.
2020. IEEE transactions on smart grid, 11 (3), 1866–1879. doi:10.1109/TSG.2019.2944768

Real-Time Simulation and System Integration
Geisbuesch, J.; Karrari, S.; Kottonau, D.; Batista de Sousa, W. T.; Kreideweis, P.; Lange, C.; Groener, F.; Noe, M.
2019, June 5. 9th International Conference on Smart Grids, Green Communications and IT Energy-aware Technologies (ENERGY 2019), Athens, Greece, June 2–6, 2019

A method for sizing centralised energy storage systems using standard patterns
Karrari, S.; Ludwig, N.; Hagenmeyer, V.; Noe, M.
2019. 2019 IEEE Milan PowerTech, 23-27 June 2019, Milan, Italy, Institute of Electrical and Electronics Engineers (IEEE). doi:10.1109/PTC.2019.8810658

Energy Time-Series Features for Emerging Applications on the Basis of Human-Readable Machine Descriptions
Vollmer, M.; Englhardt, A.; Trittenbach, H.; Bielski, P.; Karrari, S.; Böhm, K.
2019. Tenth ACM International Conference on Future Energy Systems (ACM e-Energy) and its co-located workshops, Phoenix, AZ, United States, 25th - 28th of June 2019, 474–481, Association for Computing Machinery (ACM). doi:10.1145/3307772.3331022

High-speed Flywheel Energy Storage System (FESS) for Voltage and Frequency Support in Low Voltage Distribution Networks
Karrari, S.; Noe, M.; Geisbuesch, J.
2018. 3rd IEEE International Conference on Intelligent Energy and Power Systems, IEPS 2018; Kharkiv; Ukraine; 10 September 2018 through 14 September 2018, 176–182, Institute of Electrical and Electronics Engineers (IEEE). doi:10.1109/IEPS.2018.8559521

Voltage and frequency support in low voltage distribution networks by a high-speed flywheel enegy storage system (FESS)
Karrari, S.; Noe, M.; Geisbuesch, J.
2018. 10th International Conference on Real-Time Simulation (2018), Paris, France, November 13–16, 2018

Set-Up of a Dynamic Multi-Purpose Power-Hardware-in-the-Loop System for New Technologies Integration
Geisbuesch, J.; Karrari, S.; Kreideweis, P.; Batista de Sousa, W. T.; Noe, M.
2018. Proceedings of the 2018 IEEE Workshop on Complexity in Engineering (COMPENG), Firenze, I, December 19, 2018, Institute of Electrical and Electronics Engineers (IEEE). doi:10.1109/CompEng.2018.8536233

High-speed flywheel energy storage system (FESS) for frequency and voltage support in low voltage distribution grids
Karrari, S.; Noe, M.; Geisbüsch, J.
2018. 8th International Conference on the Integration of Renewable and Distributed Energy Resources (IRED 2018), Vienna, Austria, October 16–19, 2018

Integration of energy storage systems into distribution grids: a high-speed flywheel energy storage system
Karrari, S.; Noe, M.; Geisbuesch, J.
2018. 2nd Workshop Energy Lab 2.0 meets Neocarbon Energy (2018), Karlsruhe, Germany, March 28–31, 2018

Frequency and voltage support by a high-speed flywheel energy storage system (FESS): A real-time simulation for hardware-in-the-loop (HIL) testing
Karrari, S.; Noe, M.; Geisbuesch, J.
2018. IEEE Workshop on Complexity in Engineering (COMPENG 2018), Florence, Italy, October 10–12, 2018

High-speed flywheel energy storage system (FESS) for voltage and frequency support by in low voltage distribution networks
Karrari, S.; Noe, M.; Geisbuesch, J.
2018. 3rd International Conference on Intelligent Energy and Power Systems (IEPS 2018), Kharkiv, Ukraine, September 10–14, 2018

Set-up of a dynamic multi-purpose power-hardware-in-the-loop system for new technologies integration
Geisbüsch, J.; Karrari, S.; Kreideweis, P.; Sousa, W. B. T. de; Noe, M.
2018. IEEE Workshop on Complexity in Engineering (COMPENG 2018), Florence, Italy, October 10–12, 2018

Applying OPAL-RT products in our laboratories: Past, present and future
Geisbüsch, J.; Karrari, S.; Kreideweis, P.; Sousa, W. B. T. de; Noe, M.
2018. OPAL-RT Germany Inauguration, Nürnberg, July 5, 2018

High speed flywheel energy storage systems for voltage support in low voltage networks
Karrari, S.; Noe, M.; Geisbuesch, J.
2018. 661. Nonlinear Dynamics, Optimization and Control of Distributed Energy Systems (2018), Bad Honnef, Germany, January 29–31, 2018

Real-time simulation of high-speed flywheel energy storage system (FESS) for distribution networks
Karrari, S.; Noe, M.; Geisbuesch, J.
2018. 9th ACM International Conference on Future Energy Systems (e-Energy 2018), Karlsruhe, Germany, June 12–15, 2018

Real-time simulation of high-speed flywheel energy storage system (FESS) for distribution networks
Karrari, S.; Noe, M.; Geisbuesch, J.
2018. 9th ACM International Conference on Future Energy Systems, e-Energy 2018; Karlsruhe; Germany; 12 June 2018 through 15 June 2018, 388–390, Association for Computing Machinery (ACM). doi:10.1145/3208903.3212034

Status of energy Lab 2.0 and overview of power-hardware-in-the-loop activities
Geisbüsch, J.; Batista de Sousa, W.; Kaiser, F.; Karrari, S.
2017. RT17: OPAL-RT’s 9th International Conference on Real-Time Simulation (2017), Montreal, Canada, September 5–8, 2017

Status of energy Lab 2.0 and overview of power-hardware-in-the-loop (PHIL) activities
Geisbüsch, J.; Batista de Sousa, W.; Kaiser, F.; Karrari, S.
2017. 3.Wissenschaftliches SCI Treffen, Karlsruhe, 11.-12.September 2017