Power Quality and EMC Working Group

Groupleader
prof. Ing. Jiří Drápela, Ph.D.

Main research areas

  • Voltage control (voltage profile regulation) in active distribution systems.
  • Frequency control in power systems (islanding operation) highly penetrated by inverter-based generation.
  • Power generating module requirements verification, in laboratory and in-field.
  • Test systems and signals for conducted disturbances in frequency range 2 to 150 kHz development.
  • Immunity of electricity meters on conducted disturbances in frequency range 2 to 150 kHz.
  • Electricity meter standard metrics weakness under PQ issues, from point of view of deviation in records from real energy flows.
  • Unified voltage quality index and its utilization for indicative evaluation of voltage quality in transmission and distribution systems, (real time) control and development of the distribution systems.
  • Flickering of lamps of various technologies due to voltage amplitude, phase and frequency modulation and interharmonics presence.
  • Low frequency EMC in power system highly penetrated by nonlinear, asymmetrical and dependent loads.
  • Power/voltage quality in DC grids.

Main practical research results

Products, prototypes, software (2019-2024 selection):

Patents and utility models:

Projects (founded by public, 2018-2024 selection):

Industrial contracts (2018-2023 selection):

Main research publications

Journals (2019-2024 selection):

  • KLUSÁČEK, J.; LANGELLA, R.; MEYER, J.; DRÁPELA, J. Performance of Smart Revenue Meters Under Bidirectional Active Energy Flows in Energy Communities. IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, 2024, vol. 73, no. 1, p. 1-12. https://doi.org/10.1109/TIM.2024.3382732 
  • VOJTEK, M.; MASTNÝ, P.; MORÁVEK, J.; DRÁPELA, J.; VRÁNA, M.; DVOŘÁČEK, J. Recent Challenges Regarding the Verification of Photovoltaic Inverters Properties and their Compliance with Technical Requirements. ACTA POLYTECH HUNG, 2023, vol. 20, no. 11, p. 63-82. https://dx.doi.org/10.12700/APH.20.11.2023.11.5
  • KLUSÁČEK, J.; DRÁPELA, J.; LANGELLA, R. Revenue Metering of Unbalanced Prosumers in Energy Communities. IEEE Open Access Journal of Power and Energy, 2023, vol. 10, no. 1, p. 426-437. https://doi.org/10.1109/OAJPE.2023.3243385 
  • DRÁPELA, J.; LANGELLA, R.; TESTA, A.; VENDEMIA, V. A New Analytical Model of Single-Phase Diode Bridge Rectifiers in the Presence of Interharmonics in Supply Voltage. IEEE Open Access Journal of Power and Energy, 2023, vol. 10, no. 1, p. 385-394. https://doi.org/10.1109/OAJPE.2023.3244330 
  • DRÁPELA, J.; LANGELLA, R.; TESTA, A.; VENDEMIA, V. Emission assessment of single-phase switch-mode PFC loads up to 150 kHz: Experimental analysis and modelling. ELECTRIC POWER SYSTEMS RESEARCH, 2023, vol. 220, no. 1, p. 1-9. https://doi.org/10.1016/j.epsr.2023.109236 
  • MENTENS, A.; CHAMORRO, H.; JACOBS, V.; TOPOLÁNEK, D.; DRÁPELA, J.; MARTINEZ, W. Impact of advanced inverter functions on low-voltage power grids. IET Energy Systems Integration, 2021, vol. 3, no. 4, p. 426-436. https://doi.org/10.1049/esi2.12018 
  • COLLIN, A.; DJOKIC, S.; DRÁPELA, J.; GUO, Z.; LANGELLA, R.; TESTA, A.; WATSON, N. Analysis of Approaches for Modeling the Low Frequency Emission of LED Lamps. ENERGIES, 2020, vol. 13, no. 7, p. 1-33. https://doi.org/10.1109/ICHQP46026.2020.9177900
  • COLLIN, A.; DJOKIC, S.; DRÁPELA, J.; LANGELLA, R.; TESTA, A. Proposal of a Desynchronized Processing Technique for Assessing High-Frequency Distortion in Power Systems. IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT, 2019, vol. 68, no. 10, p. 3883-3891. https://doi.org/10.1109/TIM.2019.2907755 
  • COLLIN, A.; DJOKIC, S.; DRÁPELA, J.; LANGELLA, R.; TESTA, A. Light Flicker and Power Factor Labels for Comparing LED Lamp Performance. IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, 2019, vol. 55, no. 6, p. 7062-7070. https://doi.org/10.1109/TIA.2019.2919643

Conference papers (2019-2024 selection):

  • VRÁNA, M.; KLUSÁČEK, J.; DVOŘÁČEK, J.; MORÁVEK, J.; DRÁPELA, J.; MASTNÝ, P.; VRTAL, M. Impact of three-phase inverter-based generating units with asymmetrical power redistribution on the low-voltage network operation. In 27th International Conference on Electricity Distribution (CIRED 2023). IET conference proceedings. Rome, Italy: IET, 2023. p. 3909-3913. https://doi.org/10.1049/icp.2023.0533
  • KLUSÁČEK, J.; DRÁPELA, J.; LANGELLA, R.; MEYER, J. Revenue Metrics Ability to Correctly Register Bidirectional Active Energy Flows in Active Distribution Networks. In 2023 IEEE 13th International Workshop on Applied Measurements for Power Systems (AMPS). New York: IEEE, 2023. p. 1-6. https://doi.org/10.1109/AMPS59207.2023.10297185
  • KUKAČKA, L.; HERGESEL, J.; NEČÁSEK, J.; BÍLEK, P.; VIK, M.; DRÁPELA, J.; MEYER, J.; STIEGLER, R. Comparison of Procedures for Measuring the Temporal Contrast Sensitivity Function. In 2023 IEEE Sustainable Smart Lighting World Conference & Expo (LS18). New York: IEEE, 2023. p. 1-6. https://doi.org/10.1109/LS1858153.2023.10170649 
  • DRÁPELA, J.; LANGELLA, R.; MEYER, J.; HALPIN, M.; MUELLER, D.; SHARMA, H.; TESTA, A.; WATSON, N.; ZECH, D. New interharmonic subgroup concept for quantifying and limiting distortion in distribution networks: further developments and experimental validation. In 27th International Conference on Electricity Distribution (CIRED 2023). IET conference proceedings. Rome, Italy: IET, 2023. p. 3296-3300. https://doi.org/10.1049/icp.2023.0862 
  • LANGELLA, R.; TESTA, A.; VENDEMIA, V.; DRÁPELA, J. New Comprehensive Analytical Model of Single-Phase AC/DC Diode Rectifiers in the Presence of Interharmonics in Supply Voltage. In Proceedings of the 2022 IEEE PES 20th International Conference on Harmonics and Quality of Power (ICHQP). 1. NEW YORK: IEEE, 2022. p. 1-6. https://doi.org/10.1109/ICHQP53011.2022.9808466 
  • KUKAČKA, L.; DRÁPELA, J.; MEYER, J.; STIEGLER, R. Response of Flicker Assessment Algorithms to Interharmonic Distortion Patterns. In Proceedings of the 2022 IEEE PES 20th International Conference on Harmonics and Quality of Power (ICHQP). 1. NEW YORK: IEEE, 2022. p. 1-5. https://doi.org/10.1109/ICHQP53011.2022.9808594 
  • KHAN, M.; DRÁPELA, J. Monitoring of Synchronization Failure for Power Electronics Converters. In 2022 6th International Conference on System Reliability and Safety (ICSRS). NEW YORK: IEEE, 2022. p. 26-31. https://doi.org/10.1109/ICSRS56243.2022.10067639 
  • DRÁPELA, J.; LANGELLA, R.; MEYER, J.; HALPIN, M.; MUELLER, D.; SHARMA, H.; TESTA, A.; WATSON, N.; ZECH, D. New Interharmonic subgroup definitions for quantifying and limiting distortion in distribution networks. In The 26th International Conference and Exhibition on Electricity Distribution (CIRED 2021). IET conference proceedings. IET, 2021. p. 965-969. https://doi.org/10.1049/icp.2021.1490 
  • ALVAREZ-HÉRAULT, M.; MADUREIRA, A.; MENDES, S.; GRUJIC MILOSEVIC, M.; FEREIDUNIAN, A.; DAVIDOVIČ, D.; MARTÍNEK, J.; SANZ, M.; BINGYIN, X.; MASAKI, T.; MORALES, D.; TOLEDO OROZCO, M.; DRÁPELA, J.; AUBIGNY, C. A survey based on the state of the art and perspectives in the monitoring and the control of LV networks. In The 26th International Conference and Exhibition on Electricity Distribution (CIRED 2021). IET conference proceedings. IET, 2021. p. 1495-1499. https://doi.org/10.1049/icp.2021.1629 
  • DRÁPELA, J.; MORÁVEK, J.; RADIL, L.; MASTNÝ, P. Performance of Standard Power/Energy Metric under Fast Changes in Active Energy Flow Direction. In 2020 19th International Conference on Harmonics and Quality of Power (ICHQP). Dubai, United Arab Emirates: IEEE, 2020. p. 1-6. https://doi.org/10.1109/ICHQP46026.2020.9177900
  • DRÁPELA, J.; MORÁVEK, J.; VRÁNA, M.; MASTNÝ, P. Power Generating Modules Field Testing Concepts for Verification of Compliance with Operational Requirements. In Proceedinds of the 2020 21st International Scientific Conference on Electric Power Engineering (EPE). 1. NY, USA: IEEE, 2020. p. 240-245. https://doi.org/10.1109/EPE51172.2020.9269230
  • STIEGLER, R.; MEYER, J.; SCHORI, S.; DRÁPELA, J.; HÖCKEL, M.; SCHEIDA, K.; HANŽLÍK, T. SURVEY OF NETWORK IMPEDANCE IN THE FREQUENCY RANGE 2-9 KHZ IN PUBLIC LOW VOLTAGE NETWORKS IN AT/CH/CZ/GE. CIRED - Open Access Proceedings Journal. CIRED, International Conference and Exhibition on Electricity Distribution. 2019. Madrid: IET, 2019. p. 1-5. http://dx.doi.org/10.34890/628
  • COLLIN, A.; LANGELLA, R.; DJOKIC, S.; TESTA, A.; DRÁPELA, J.; WATSON, N. Harmonic Modeling of LED lamps by Means of Admittance Frequency Coupling Matrices. In Proceedings of the IEEE Power Tech 2019 Conference. 1. Milano: IEEE PES, 2019. p. 1-6. https://doi.org/10.1109/PTC.2019.8810803