@inproceedings{MTMT:34562513,
	title = {Application Experiences of Low Voltage Inline Voltage Regulator with Significant Photovoltaic Generation},
	url = {https://m2.mtmt.hu/api/publication/34562513},
	author = {Vokony, István and Táczi, István and Csatár, János and Dán, András and Hartmann, Bálint and Sőrés, Péter Márk},
	booktitle = {2023 IEEE PES Innovative Smart Grid Technologies Europe (ISGT EUROPE)},
	doi = {10.1109/ISGTEUROPE56780.2023.10408377},
	unique-id = {34562513},
	abstract = {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.},
	keywords = {case study; ASYMMETRY; low voltage; inline voltage regulator},
	year = {2023},
	orcid-numbers = {Táczi, István/0000-0002-0835-0481; Csatár, János/0000-0003-4430-9280}
}

@article{MTMT:33284209,
	title = {The Role of Hybrid Battery–SMES Energy Storage in Enriching the Permanence of PV–Wind DC Microgrids: A Case Study},
	url = {https://m2.mtmt.hu/api/publication/33284209},
	author = {Salama, Hossam Salah Hussein and Kotb Baldam, Kotb Mohamed and Vokony, István and Dán, András},
	doi = {10.3390/eng3020016},
	journal-iso = {ENG},
	journal = {ENG},
	volume = {3},
	unique-id = {33284209},
	abstract = {The superior access to renewable sources in modern power systems increases the fluctuations in system voltage and power. Additionally, the central dilemmas in using renewable energy sources (RESs) are the intermittent nature of and dependence on wind speed and solar irradiance for wind and photovoltaic (PV) systems, respectively. Therefore, utilizing a vigorous and effective energy storage system (ESS) with RESs is crucial to overcoming such challenges and dilemmas. This paper describes the impacts of using a battery storage system (BSS) and superconducting magnetic energy storage (SMES) system on a DC bus microgrid-integrated hybrid solar–wind system. The proposed method employs a combination of BSS and SMES to improve the microgrid stability during different events, such as wind variation, shadow, wind turbine (WT) connection, and sudden PV outage events. Distinct control approaches are proposed to control the system’s different components in order to increase overall system stability and power exchange. Both the PV and wind systems are further equipped with unique maximum power point tracking (MPPT) controllers. Additionally, each of the ESSs is controlled using a proposed control method to supervise the interchange of the active power within the system and to keep the DC bus voltage constant during the different examined instabilities. Furthermore, to maintain the load voltage /frequency constant, the prime inverter is controlled using the proposed inverter control unit. The simulation results performed with Matlab/Simulink show that the hybrid BSS + SMES system successfully achieves the main targets, i.e., DC voltage, interchange power, and load voltage/frequency are improved and smoothed out. Moreover, a comparison among three case studies is presented, namely without using ESSs, using the BSS only, and once more using both BSS and SMES systems. The findings prove the efficacy of the proposed control method based on the hybrid BSS + SMES approach over BSS only in preserving the modern power system’s stability and reliability during the variable events.},
	year = {2022},
	eissn = {2673-4117},
	pages = {207-223}
}

@article{MTMT:33091411,
	title = {Comparative Analysis of a DC-microgrid Incorporating Hybrid Battery/Supercapacitor Storage System Addressing Pulse Load},
	url = {https://m2.mtmt.hu/api/publication/33091411},
	author = {Salama, Hossam Salah Hussein and Kotb Baldam, Kotb Mohamed and Vokony, István and Dán, András},
	doi = {10.24084/repqj20.310},
	journal-iso = {RENEWABLE ENERGY & POWER QUALITY J},
	journal = {RENEWABLE ENERGY & POWER QUALITY JOURNAL},
	volume = {20},
	unique-id = {33091411},
	year = {2022},
	eissn = {2172-038X},
	pages = {359-363}
}

@article{MTMT:32550297,
	title = {Enriching the stability of solar/wind DC microgrids using battery and superconducting magnetic energy storage based fuzzy logic control},
	url = {https://m2.mtmt.hu/api/publication/32550297},
	author = {Kotb Baldam, Kotb Mohamed and Elmorshedy, Mahmoud F. and Salama, Hossam Salah Hussein and Dán, András},
	doi = {10.1016/j.est.2021.103751},
	journal-iso = {J ENERGY STORAGE},
	journal = {JOURNAL OF ENERGY STORAGE},
	volume = {45},
	unique-id = {32550297},
	issn = {2352-152X},
	abstract = {Utilizing robustly-controlled energy storage technologies performs a substantial role in improving the stability of standalone microgrids in terms of voltages and powers. The majority of investigations focused less on integrating energy storage systems (especially superconducting magnetic energy storage 'SMES') within DC-bus microgrids. Besides, implementing fuzzy logic control (FLC) for both batteries and SMES within the DC-bus microgrids to enrich their stability and power quality under extreme climatic and loading variations has been seldomly addressed. Consequently, this paper introduces a comparative analysis of the performance of a hybrid renewable PV/wind DC-bus microgrid that separately implements fuzzy-controlled battery and SMES systems to enhance the microgrid stability and power quality. The proposed FLC approaches supervise energy interchange inside the system, mitigate the DC-bus voltage fluctuations, and smooth out the load power during the different instabilities. The system is examined under distinct normal and extreme climatic fluctuations such as wind gusts and rapid shadow and under sudden balanced and unbalanced loading events. The proposed FLC approaches are established based on quantifying the DC-bus voltage variation and measuring the actual battery and SMES currents which can be employed directly for the control action; hence, reducing both calculations/calibrations and complexity of the control system. Besides, they offer very quick charging/discharging actions for both battery and SMES systems to mitigate unexpected and rapid variations efficiently. For the load side, the study proposes a variable modulation index control based-sinusoidal pulse width modulation for controlling the prime inverter to preserve the load voltage and frequency constant during both balanced and unbalanced loading and extreme climatic disturbances. The obtained findings confirmed the efficacy of the proposed approaches in enriching the microgrid stability. Besides, they unveiled the magnificent performance of SMES over batteries regarding the response time, peak over- and undershoot, load voltage profile, and load power smoothness.},
	year = {2022},
	eissn = {2352-1538}
}

@article{MTMT:32490454,
	title = {Performance Assessment of Integrating SMES and Battery Storage Systems with Renewable DC-bus Microgrids: A Comparison},
	url = {https://m2.mtmt.hu/api/publication/32490454},
	author = {Kotb Baldam, Kotb Mohamed and Elmorshedy, Mahmoud F. and Dán, András},
	doi = {10.3311/PPee.17676},
	journal-iso = {PERIOD POLYTECH ELECTR ENG COMP SCI},
	journal = {PERIODICA POLYTECHNICA-ELECTRICAL ENGINEERING AND COMPUTER SCIENCE},
	volume = {65},
	unique-id = {32490454},
	issn = {2064-5260},
	abstract = {The presence of renewable energy sources in hybrid renewable energy systems is considered a significant challenge since the generation mainly depends on meteorological conditions. Hence, employing a robust and flexible energy storage system is, therefore, a crucial solution in such circumstances. This paper investigates the performance evaluation of both batteries and superconducting magnetic energy storage (SMES) systems integrated with hybrid solar-wind DC-bus microgrid. The study focuses on enhancing the system stability using both storage technologies during normal and extreme renewables instabilities like wind gusts and shadows, and sudden load variations. Moreover, the load voltage/frequency were preserved constant during the distinct instabilities using the inverter control system. Productive findings showed the superior performance of utilizing the SMES over the batteries and its potential to enhance the system power-quality.},
	year = {2021},
	eissn = {2064-5279},
	pages = {382-393}
}

@article{MTMT:31923429,
	title = {A fuzzy decision-making model for optimal design of solar, wind, diesel-based RO desalination integrating flow-battery and pumped-hydro storage: Case study in Baltim, Egypt},
	url = {https://m2.mtmt.hu/api/publication/31923429},
	author = {Kotb Baldam, Kotb Mohamed and Elkadeem, M.R. and Khalil, Ahmed and Imam, Sherif M. and Hamada, Mohamed A. and Sharshir, Swellam W. and Dán, András},
	doi = {10.1016/j.enconman.2021.113962},
	journal-iso = {ENERG CONVERS MANAGE},
	journal = {ENERGY CONVERSION AND MANAGEMENT},
	volume = {235},
	unique-id = {31923429},
	issn = {0196-8904},
	year = {2021},
	eissn = {1879-2227},
	orcid-numbers = {Khalil, Ahmed/0000-0002-9864-0529}
}

@article{MTMT:31923415,
	title = {Feasibility analysis and optimization of an energy-water-heat nexus supplied by an autonomous hybrid renewable power generation system: An empirical study on airport facilities},
	url = {https://m2.mtmt.hu/api/publication/31923415},
	author = {Elkadeem, M.R. and Kotb Baldam, Kotb Mohamed and Elmaadawy, Khaled and Ullah, Zia and Elmolla, Emad and Liu, Bingchuan and Wang, Shaorong and Dán, András and Sharshir, Swellam W.},
	doi = {10.1016/j.desal.2021.114952},
	journal-iso = {DESALINATION},
	journal = {DESALINATION},
	volume = {504},
	unique-id = {31923415},
	issn = {0011-9164},
	year = {2021},
	eissn = {1873-4464}
}

@article{MTMT:31923385,
	title = {A two-stage multi-attribute analysis method for city-integrated hybrid mini-grid design},
	url = {https://m2.mtmt.hu/api/publication/31923385},
	author = {Elkadeem, M.R. and Kotb Baldam, Kotb Mohamed and Ullah, Zia and Atiya, Eman G. and Dán, András and Wang, Shaorong},
	doi = {10.1016/j.scs.2020.102603},
	journal-iso = {SUSTAIN CITIES SOC},
	journal = {SUSTAINABLE CITIES AND SOCIETY},
	volume = {65},
	unique-id = {31923385},
	issn = {2210-6707},
	year = {2021},
	eissn = {2210-6715},
	orcid-numbers = {Ullah, Zia/0000-0002-1466-3564}
}

@article{MTMT:31388507,
	title = {Coordinated power management and optimized techno-enviro-economic design of an autonomous hybrid renewable microgrid: A case study in Egypt},
	url = {https://m2.mtmt.hu/api/publication/31388507},
	author = {Kotb Baldam, Kotb Mohamed and Elkadeem, M.R. and Elmorshedy, Mahmoud F. and Dán, András},
	doi = {10.1016/j.enconman.2020.113185},
	journal-iso = {ENERG CONVERS MANAGE},
	journal = {ENERGY CONVERSION AND MANAGEMENT},
	volume = {221},
	unique-id = {31388507},
	issn = {0196-8904},
	year = {2020},
	eissn = {1879-2227},
	orcid-numbers = {Kotb Baldam, Kotb Mohamed/0000-0002-9601-6167; Elkadeem, M.R./0000-0002-0498-3281; Elmorshedy, Mahmoud F./0000-0001-7900-4351}
}

@inproceedings{MTMT:31291106,
	title = {Permanence Improvement of a Local Energy Production System Including Unbalanced Loading},
	url = {https://m2.mtmt.hu/api/publication/31291106},
	author = {Kotb Baldam, Kotb Mohamed and Mahmoud, F. Elmorshedy and Dán, András},
	booktitle = {2019 International IEEE Conference and Workshop in Óbuda on Electrical and Power Engineering (CANDO-EPE)},
	doi = {10.1109/CANDO-EPE47959.2019.9110974},
	unique-id = {31291106},
	year = {2019},
	pages = {185-190}
}