TY - JOUR AU - Ódor, Géza AU - Papp, István AU - Benedek, Kristóf AU - Hartmann, Bálint TI - Improving power-grid systems via topological changes or how self-organized criticality can help power grids JF - PHYSICAL REVIEW RESEARCH J2 - PRRESEARCH VL - 6 PY - 2024 IS - 1 PG - 10 SN - 2643-1564 DO - 10.1103/PhysRevResearch.6.013194 UR - https://m2.mtmt.hu/api/publication/34673441 ID - 34673441 N1 - Funding Agency and Grant Number: Hungarian National Research, Development and Innovation Office (NKFIH), Hungary [K128989]; Eotvos Lorand Kutatoi Halozat (ELKH) [SA-44/2021] Funding text: Support from the Hungarian National Research, Development and Innovation Office (NKFIH), Hungary (Grant No. K128989) and from the Eotvos Lorand Kutatoi Halozat (ELKH) Grant No. SA-44/2021 is acknowledged. We thank Kormanyzati Informatikai Fejlesztesi Ugynokseg (KIFU) for access to the national supercomputer network, Jeffrey Kelling for developing the GPU HPC code, and Shengfeng Deng for his comments and the maintenance of our local computing resources. LA - English DB - MTMT ER - TY - JOUR AU - Kollár, László Péter AU - Fésüs, László AU - Gócza, Elen AU - Halmai, Péter AU - Hartmann, Bálint AU - Holl, András AU - Kaptay, György AU - Lencsés, Ákos AU - Makara, Gábor AU - Monok, István AU - Péli, Gábor Lajos AU - Sepsi, Enikő AU - Soós, Sándor AU - Tausz, Katalin AU - Ulbert, István TI - Javaslatok a „predátor” jelenség hazai kezelésére. Proposals for the Domestic Management of the “Predator” Phenomenon TS - Proposals for the Domestic Management of the “Predator” Phenomenon JF - MAGYAR TUDOMÁNY J2 - MAGYAR TUDOMÁNY VL - 185 PY - 2024 IS - 1 SP - 71 EP - 81 PG - 11 SN - 0025-0325 DO - 10.1556/2065.184.2024.1.9 UR - https://m2.mtmt.hu/api/publication/34506300 ID - 34506300 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Divényi, Dániel AU - Sleisz, Ádám AU - Sőrés, Péter Márk AU - Csercsik, Dávid AU - Hartmann, Bálint TI - A potential framework for cross-zonal reserve procurement on European power exchanges based on robust optimization JF - SUSTAINABLE ENERGY GRIDS & NETWORKS J2 - SUSTAIN ENERGY GRIDS VL - 37 PY - 2024 PG - 18 SN - 2352-4677 DO - 10.1016/j.segan.2023.101267 UR - https://m2.mtmt.hu/api/publication/34479950 ID - 34479950 N1 - Department of Electric Power Engineering, Budapest University of Technology and Economics, Egry József u. 18, Budapest, 1111, Hungary Institute of Economics, Centre for Economic and Regional Studies, Tóth Kálmán u. 4, Budapest, 1097, Hungary Faculty of Information Technology and Bionics, Pázmány Péter Catholic University, Práter u. 50/A, Budapest, 1083, Hungary Export Date: 19 February 2024 Correspondence Address: Sleisz, Á.; Department of Electric Power Engineering, Egry József u. 18, Hungary; email: sleisz.adam@bme.hu Funding details: Horizon 2020 Framework Programme, H2020 Funding details: Horizon 2020, 864274, FK 137608 Funding details: Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, NKFI Funding text 1: The project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement no. 864274 and from the Fund FK 137608 of the Hungarian National Research, Development and Innovation Office . Funding text 2: The authors are grateful to Beáta Polgári and Dr. Ágnes Závecz for their valuable insights regarding simulation results and Dr. István Vokony for his communicational and organizational support during the research. The contributions of Lilla Barancsuk and Zoltán Jakab to the software framework of the numerical tests are highly appreciated. The project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement no. 864274 and from the Fund FK 137608 of the Hungarian National Research, Development and Innovation Office. LA - English DB - MTMT ER - TY - CHAP AU - Bereczki, Bence AU - Kiss, József AU - Hartmann, Bálint AU - Sőrés, Péter Márk ED - Bertrand, Raison TI - Use of sensitivity factors to support congestion zoning on flexibility markets T2 - 2023 IEEE PES Innovative Smart Grid Technologies Europe (ISGT EUROPE) PB - IEEE CY - Piscataway (NJ) SN - 9798350396782 PY - 2023 PG - 6 DO - 10.1109/ISGTEUROPE56780.2023.10408188 UR - https://m2.mtmt.hu/api/publication/34562516 ID - 34562516 N1 - ENEDIS; et al.; GreenAlp; Le Reseau de Transport d'electricite (RTE); Schneider Electric; Think Smartgrids Conference code: 196974 Export Date: 22 March 2024 Funding details: Horizon 2020 Framework Programme, H2020 Funding text 1: This work was supported by the European Union’s Horizon 2020 AB - Distribution system operators face more and more issues due the rapid spread of intermittent renewable energy sources on distribution grids. The most significant of these issues on the Hungarian distribution grids is the excess of voltage limits. In this paper sensitivity factors are defined to connect network voltage constraints and market-based flexibility products. A simplified network model is created based on the characteristics of Hungarian distribution grids for both medium voltage and low voltage investigations. Sensitivity factors for voltage control are calculated with both active and reactive power flows. Correlations between the effects of interventions on both different branches and voltage levels are examined. It is demonstrated that the effect of active and reactive power flows is primarily defined by the impedances of the lines. It is also shown that congestion zones can be created both per branches and voltage levels on radial networks, as the cross effects are insignificant. © 2023 IEEE. LA - English DB - MTMT ER - TY - CHAP AU - Vokony, István AU - Táczi, István AU - Csatár, János AU - Dán, András AU - Hartmann, Bálint AU - Sőrés, Péter Márk ED - Bertrand, Raison TI - Application Experiences of Low Voltage Inline Voltage Regulator with Significant Photovoltaic Generation T2 - 2023 IEEE PES Innovative Smart Grid Technologies Europe (ISGT EUROPE) PB - IEEE CY - Piscataway (NJ) SN - 9798350396782 PY - 2023 PG - 6 DO - 10.1109/ISGTEUROPE56780.2023.10408377 UR - https://m2.mtmt.hu/api/publication/34562513 ID - 34562513 N1 - ENEDIS; et al.; GreenAlp; Le Reseau de Transport d'electricite (RTE); Schneider Electric; Think Smartgrids Conference code: 196974 Export Date: 22 March 2024 Funding text 1: ACKNOWLEDGMENT The research reported in this paper has been supported by E.ON Hungary. AB - Renewable energy generation is spreading apace worldwide, bringing integration challenges for distribution system operators. The focus of this study is to investigate the possible solutions to increase the hosting capacity of an actual low voltage (LV) feeder in Hungary. This pilot site already has significant photovoltaic (PV) generation, but more installations are expected in the near future. Simulations were carried out to compare the available technical options increasing the hosting capacity. Detailed on-site measurements were taken, which included the neutral line, to have a better understanding of the basic situation. It showed that the voltage is close to the limits with significant unbalance. Therefore, an unbalanced model was adopted with a new calculation method in order to incorporate the neutral line and the groundings. The simulations compared local PV inverter control, inline voltage regulator, tap-changing transformer and phase balancer and found the inline voltage regulator as the most effective and versatile solution for this case. A new device was developed and installed that implements an inline voltage regulator, optimized for local circumstances. Then, a longer series of measurements were taken which proved the effectiveness of the unit, showing that it can be a cost-effective grid development alternative to grid reinforcement. © 2023 IEEE. LA - English DB - MTMT ER - TY - JOUR AU - Ballai, Gergő AU - Sőrés, Milán Attila AU - Vásárhelyi, Lívia AU - Szenti, Imre AU - Kun, Róbert AU - Hartmann, Bálint AU - Sebők, Dániel AU - Farkas, Ferenc AU - Zahoor, A. AU - Mao, G. AU - Sápi, András AU - Kukovecz, Ákos AU - Kónya, Zoltán TI - Exploration of Li-Ion Batteries during a Long-Term Heat Endurance Test Using 3D Temporal Microcomputed Tomography Investigation JF - ENERGY TECHNOLOGY J2 - ENERGY TECHNOL-GER VL - 11 PY - 2023 IS - 8 PG - 10 SN - 2194-4288 DO - 10.1002/ente.202300207 UR - https://m2.mtmt.hu/api/publication/34536297 ID - 34536297 LA - English DB - MTMT ER - TY - CHAP AU - Geelen, D. AU - Barta, V. AU - Hartvigsson, E. AU - van, der Mei A. AU - Doomernik, J.-P. AU - Pastor, R. AU - Hartmann, Bálint ED - IET, , TI - All models are wrong, but some are useful: an exploration of confidence T2 - 27th International Conference on Electricity Distribution (CIRED 2023) PB - Institution of Engineering and Technology (IET) CY - Stevenage SN - 9781839538551 T3 - IET conference proceedings, ISSN 2732-4494 PY - 2023 SP - 2553 EP - 2557 PG - 5 DO - 10.1049/icp.2023.1123 UR - https://m2.mtmt.hu/api/publication/34516461 ID - 34516461 N1 - Enexis DSO, Netherlands HM University of Applied Sciences, Munich, Germany Endre, Sweden Duinn, Netherlands R&D NESTER, Portugal Budapest University of Technology, Hungary Conference code: 195672 Export Date: 19 January 2024 Funding text 1: Conceptualization and Methodology: Veronika Barta, Elias Hartvigsson, Age van der Mei, Daphne Geelen, Jan-Peter Doomernik, Bálint Hartmann and Ricardo Pastor. Interviews: Veronika, Barta, Daphne Geelen, Elias Hartvigsson, Jan-Peter Doomernik, Age van der Mei, Bálint Hartmann. Writing - Original Draft: Daphne Geelen, Veronika Barta Writing - Review & Editing: Jan-Peter Doomernik, Age van der Mei, Elias Hartvigsson, Veronika Barta, Bálint Hartmann, Daphne Geelen, Ricardo Pastor. AB - The subject of this paper is confidence in model outcomes used in the planning and operation of power grids. An important factor in the validity of models is that only a limited number of context variables can be taken into account, while at the same time the context in which we operate is changing rapidly and unexpectedly. Considering the quickly changing and complex context we operate in, the question arises how modelers and users of model outcomes deal with potentially massively changing conditions and input parameters in practice. This exploratory research used interviews to gain insight into this issue. The main outcomes are that modelling of current situation is observed as high, for short-term medium to high and long-term low to medium. © The Institution of Engineering and Technology 2023. LA - English DB - MTMT ER - TY - CHAP AU - van, der Mei A. AU - Hartvigsson, E. AU - Geelen, D. AU - Hartmann, Bálint AU - Pastor, R. AU - Doomernik, J.-P. ED - IET, , TI - FORECASTING FOR ELECTRICITY GRID PLANNING: CURRENT CHALLENGES AND FUTURE IMPROVEMENTS T2 - 27th International Conference on Electricity Distribution (CIRED 2023) PB - Institution of Engineering and Technology (IET) CY - Stevenage SN - 9781839538551 T3 - IET conference proceedings, ISSN 2732-4494 PY - 2023 SP - 3255 EP - 3259 PG - 5 DO - 10.1049/icp.2023.0870 UR - https://m2.mtmt.hu/api/publication/34516459 ID - 34516459 N1 - Duinn, Netherlands Endre Enexis DSO, Netherlands Budapest University of Technology and Economics, Hungary R&D NESTER Conference code: 195672 Cited By :1 Export Date: 19 January 2024 AB - Large changes in production and consumption of electricity poses a challenge for grid operators how to operate and plan the grid. Forecasting future demand and production is one way to reduce investment risks. This study investigates the perceived challenges and opportunities of forecasting for grid planning and operation. A majority of questionnaire respondents indicate that the uncertainty in their forecasts is high or very high and that confidence in the forecasts is only medium, and medium-low for long-term forecasts. Input data (amount, quality, handling etc) is seen as the largest challenge, while new, advanced models are seen as the biggest future improvement possibility. © The Institution of Engineering and Technology 2023. LA - English DB - MTMT ER - TY - CHAP AU - Sőrés, Milán Attila AU - Kövesdi, Roland AU - Hartmann, Bálint ED - Mohos, András ED - Táczi, István ED - Tóth, Zoltán TI - Nátrium-kén akkumulátor, mint hálózati energiatároló T2 - XIII. Mechwart András Ifjúsági Találkozó: Konferenciakiadvány PB - Magyar Elektrotechnikai Egyesület, Mechwart András Ifjúsági Társaság CY - Siófok SN - 9789639299511 PY - 2023 SP - 118 EP - 127 PG - 10 DO - 10.54232/MAIT.2023_10 UR - https://m2.mtmt.hu/api/publication/34431571 ID - 34431571 LA - Hungarian DB - MTMT ER - TY - CHAP AU - Ludmann, Levente AU - Mátrai, Tamás AU - Hartmann, Bálint ED - Mohos, András ED - Táczi, István ED - Tóth, Zoltán TI - Publikus villamosautó-töltőállomások területi elemzése T2 - XIII. Mechwart András Ifjúsági Találkozó: Konferenciakiadvány PB - Magyar Elektrotechnikai Egyesület, Mechwart András Ifjúsági Társaság CY - Siófok SN - 9789639299511 PY - 2023 SP - 88 EP - 95 PG - 8 DO - 10.54232/MAIT.2023_7 UR - https://m2.mtmt.hu/api/publication/34431562 ID - 34431562 LA - Hungarian DB - MTMT ER -