dr. sc. Tomislav Baškarad

Senior Assistant, Department of Energy and Power Systems

Improving Power System Frequency Response with Converter-Based Resources: A Measurement-Based Analysis

Baškarad, Tomislav; Holjevac, Ninoslav; Kuzle, Igor
2025.

OPTIMIZATION MODEL FOR WIND FARM MAINTENANCE

Kobeščak, Karlo; Baškarad, Tomislav; Kuzle, Igor
2025.

Determining Available Energy and Operating Voltage Range of a Supercapacitor Storage System for Inertia Support in Converter-Dominated Power Systems

Kobeščak, Karlo; Baškarad, Tomislav; Kuzle, Igor
2025.

Interactive Course for Power Plant Compliance Tests With Grid Connection Requirements

Korunović, Lidija M.; Kostić, Vojkan; Baškarad, Tomislav; Kuzle, Igor
2025.

Review of Supercapacitor Equivalent Circuit Models

Kobeščak, Karlo; Baškarad, Tomislav
2025.
Journal of Energy = Energija

Survey of Supercapacitor Energy Storage Technology, Modeling and Ancillary Service Applications in Low-Carbon Power Systems

Kobeščak, Karlo; Baškarad, Tomislav; Kuzle, Igor
2025.
IEEE access

Analysis of Tie-Line Impact on Frequency Response in Multi-Area Power Systems

Baškarad, Tomislav; Holjevac, Ninoslav; Kuzle, Igor
2024.

Estimation of Area Frequency Response in Island Operation Mode by Utilizing Interconnected Power System Measurements

Baškarad, Tomislav; Holjevac, Ninoslav; Kuzle, Igor; Seppänen, Janne
2024.
IEEE transactions on power systems

IEEE PES ISGT Europe 2024 Conference book


2024.

2024 IEEE PES ISGT Europe Conference book


2024.

Evaluating the possibilities of inverter based technologies to ensure system dynamic stability

Kostelac, Matija; Baškarad, Tomislav; Zidar, Matija; Holjevac, Ninoslav; Kuzle, Igor
2024.

A new perspective on frequency control in conventional and future interconnected power systems

Baškarad, Tomislav; Holjevac, Ninoslav; Kuzle, Igor
2024.
International journal of electrical power & energy systems

Enhancing Education in Multi-Energy Systems with Data Science Notebooks

Ehsan, Ali; Baškarad, Tomislav; Azzopardi, Brian; Cesena, E. A. Martínez; Milanovic, J. V.
2024.

Preliminary technical connection study for WPP Labusi

Holjevac, Ninoslav; Zidar, Matija; Baškarad, Tomislav; Kuzle, Igor
2023.

Preliminary technical connection study for WPP Ričipolje

Holjevac, Ninoslav; Zidar, Matija; Baškarad, Tomislav; Kuzle, Igor
2023.

Preliminary technical connection study for WPP Rudić

Holjevac, Ninoslav; Zidar, Matija; Baškarad, Tomislav; Kuzle, Igor
2023.

Određivanje rezerve snage fotonaponskih elektrana za potrebe regulacije frekvencije elektroenergetskoga sustava

Baškarad, Tomislav
2023.

Multi-area power system frequency nadir prediction

Baškarad, Tomislav; Holjevac, Ninoslav; Kuzle, Igor
2023.

Preliminary technical connection study for WPP ZD5

Holjevac, Ninoslav; Zidar, Matija; Baškarad, Tomislav; Kuzle, Igor
2023.

Study of the optimal technical solution for connection to the electricity grid - KVP (SE) H2 SE Bisko (consumer with own production: 6300 kW in the direction of production, 7000 kW in the direction of consumption)

Baškarad, Tomislav ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Nemec, Darko ; Zidar, Matija
2022.

Technical study for connection of solar power plant SE Podravska Moslavina (9900 kW) to the distribution grid

Baškarad, Tomislav ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Nemec, Darko ; Zidar, Matija
2022.

Photovoltaic System Control for Power System Frequency Support in Case of Cascading Events

Baškarad, Tomislav ; Holjevac, Ninoslav ; Kuzle, Igor
2022.
IEEE Transactions on Sustainable Energy

A novel primary frequency control framework for multi-area power systems containing battery energy storage systems

Baškarad, T. ; Holjevac, N. ; Kuzle, I. ; Pandžić, H.
2022.

Technical study for connection of solar power plant FNE Pag (6300 kW) to the distribution grid

Baškarad, Tomislav ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Nemec, Darko ; Zidar, Matija
2022.

Study of the optimal technical solution for connection to the electricity grid - KVP (SE) Knauf Novi Marof (consumer with own production: 1210 kW in the direction of production, 12 000 kW in the direction of consumption)

Baškarad, Tomislav ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Nemec, Darko ; Zidar, Matija
2022.

Technical study for connection of solar power plant SE Kraljevci (9999 kW) to the distribution grid

Baškarad, Tomislav ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Nemec, Darko ; Zidar, Matija
2022.

Technical study for connection of solar power plant SE Lozovac (9999 kW) to the distribution grid

Baškarad, Tomislav ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Nemec, Darko ; Zidar, Matija
2022.

The 2022 International Conference on Smart Grid Synchronized Measurements and Analytics (SGSMA2022) Conference Book


2022.

Assessment of power system capacity and potential for integration of solar power plants

Holjevac, Ninoslav ; Zidar, Matija ; Baškarad, Tomislav ; Kuzle, Igor
2022.

Dynamically adaptive method for under frequency load shedding protection scheme reconfiguration

Baškarad, Tomislav ; Holjevac, Ninoslav ; Kuzle, Igor ; Ivanković, Igor
2022.
Electric power systems research

Technical study for connection of solar power plant SE Bukovica (9990 kW) to the distribution grid

Baškarad, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Nemec, Darko ; Zidar, Matija
2021.

Study of the optimal technical solution for connection to the electricity grid - FER (consumer with own production: 747,9 kW in the direction of production, 750 kW in the direction of consumption

Baškarad, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Nemec, Darko ; Zidar, Matija
2021.

Technical study for connection of solar power plant SE Dugo Selo (15000 kW) to the distribution grid

Baškarad, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Nemec, Darko ; Zidar, Matija
2021.

(Technical study for connection of solar power plant SE Benkovac 3 (9990 kW) to the distribution grid)

Baškarad, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Nemec, Darko ; Zidar, Matija
2021.

Technical study for connection of biogas power plant "Šarampov" (2000 kW) to the distribution grid

Baškarad, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Nemec, Darko ; Zidar, Matija
2021.

Analysis of the impact of power plant parameters on the power system frequency response characteristics

Baškarad, Tomislav ; Holjevac, Ninoslav ; Kuzle, Igor
2021.

(Technical study for connection of solar power plant SE Benkovac 2 (9990 kW) to the distribution grid)

Baškarad, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Nemec, Darko ; Zidar, Matija
2021.

Technical study for connection of solar power plant SE Hatnjak (9900 kW) to the distribution grid

Baškarad, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Nemec, Darko ; Zidar, Matija
2021.

Technical study for connection of wind power plant Dazlina 2 (11000 kW) to the distribution grid

Baškarad, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Nemec, Darko ; Zidar, Matija
2021.

Study of the optimal technical solution for connection to the electricity grid - Eco recycling park Kutina (consumer with own production: 17,000 kW in the direction of production, 6,088.2 kW in the direction of consumption)

Baškarad, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Nemec, Darko ; Zidar, Matija
2021.

Challenges of High Renewable Energy Sources Integration in Power Systems — The Case of Croatia

Holjevac, Ninoslav ; Baškarad, Tomislav ; Đaković, Josip ; Krpan, Matej ; Zidar, Matija ; Kuzle, Igor
2021.
Energies (Basel)

(Technical study for connection of solar power plant SE Hvar Grablje (9999 kW) to the distribution grid)

Baškarad, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Nemec, Darko ; Zidar, Matija
2021.

(Technical study for connection of solar power plant SE Benkovac 1 (9990 kW) to the distribution grid)

Baškarad, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Nemec, Darko ; Zidar, Matija
2021.

Technical study for connection of a large consumer (harbor) Luka Dubrovnik Gruž (15000 kW) to the distribution grid

Baškarad, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Nemec, Darko ; Zidar, Matija
2021.

Action plan for power grid strengthening to support the integration of renewable energy sources

Kuzle, Igor ; Holjevac, Ninoslav ; Baškarad, Tomislav ; Đaković, Josip ; Majstrović, Goran ; Megla, Igor ; Ćurlin, Stipe ; Komušanac, Ivan
2021.

(Technical study for connection of solar power plant SE Novska (6000 kW) to the distribution grid)

Baškarad, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Nemec, Darko ; Zidar, Matija
2021.

(Technical study for connection of geothermal power plant AAT Geothermae (12 000 kW) to the distribution grid)

Baškarad, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Nemec, Darko ; Zidar, Matija
2021.

Technical study for connection of solar power plant SE Šestanovac 2 (9900 kW) to the distribution grid

Baškarad, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Nemec, Darko ; Zidar, Matija
2021.

Photovoltaic System Power Reserve Determination Using Parabolic Approximation of Frequency Response

Baškarad, Tomislav ; Kuzle, Igor ; Holjevac, Ninoslav
2021.
IEEE Transactions on Smart Grid

Technical study for connection of solar power plant FN Grad Križevci (4900 kW) to the distribution grid

Baškarad, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Nemec, Darko ; Zidar, Matija
2021.

Technical study for connection of solar power plant SE Krnjak (10000 kW) to the distribution grid

Baškarad, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Nemec, Darko ; Zidar, Matija
2021.

Technical study for connection of solar power plant Bogomolje (10000 kW) to the distribution grid

Baškarad, Tomislav ; Capuder, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Milković, Aleksandar ; Nemec, Darko ; Pandžić, Hrvoje ; Pavić, Ivan ; Zidar, Matija
2020.

ROCOF importance in electric power systems with high renewables share: A simulation case for Croatia

Baškarad, Tomislav ; Holjevac, Ninoslav ; Kuzle, Igor ; Ivanković, Igor ; Zovko, Nikolina
2020.

The importance of ROCOF in the power system with high scale of inverters based power plants

Baškarad, Tomislav ; Holjevac, Ninoslav ; Đaković, Josip ; Kuzle, Igor ; Ivanković, Igor
2020.

Impact of wind capacity share, allocation of inertia and grid configuration on transient RoCoF: The case of the Croatian power system

Đaković, Josip ; Krpan, Matej ; Ilak, Perica ; Baškarad, Tomislav ; Kuzle, Igor
2020.
International journal of electrical power & energy systems

Technical study for connection of solar power plant SE Šestanovac to the distribution grid

Baškarad, Tomislav ; Capuder, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Milković, Aleksandar ; Nemec, Darko ; Pandžić, Hrvoje ; Pavić, Ivan ; Zidar, Matija
2020.

Technical study for connection of wind power plant Jasenice 2 (10000 kW) to the distribution grid

Baškarad, Tomislav ; Capuder, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Milković, Aleksandar ; Nemec, Darko ; Pandžić, Hrvoje ; Pavić, Ivan ; Zidar, Matija
2019.

Technical study for connection of solar power plant Hrvace(9900 kW) to the distribution grid

Baškarad, Tomislav ; Capuder, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Milković, Aleksandar ; Nemec, Darko ; Pandžić, Hrvoje ; Pavić, Ivan ; Zidar, Matija
2019.

Technical study for connection of solar power plant Pliskovo (5000 kW) to the distribution grid

Baškarad, Tomislav ; Capuder, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Milković, Aleksandar ; Nemec, Darko ; Pandžić, Hrvoje ; Pavić, Ivan ; Zidar, Matija
2019.

Technical study for connection of solar power plant Konjščina (17000 kW) to the distribution grid

Baškarad, Tomislav ; Capuder, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Milković, Aleksandar ; Nemec, Darko ; Pandžić, Hrvoje ; Pavić, Ivan ; Zidar, Matija
2019.

Possibilities of participation of photovoltaic power plants in providing ancillary services

Baškarad, Tomislav
2019.

Technical study for connection of solar power plant Ivanec (15500 kW) to the distribution grid)

Baškarad, Tomislav ; Capuder, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Milković, Aleksandar ; Nemec, Darko ; Pandžić, Hrvoje ; Pavić, Ivan ; Zidar, Matija
2019.

Technical study for connection of wind power plant Dazlina (19900 kW) to the distribution grid

Baškarad, Tomislav ; Capuder, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Milković, Aleksandar ; Nemec, Darko ; Pandžić, Hrvoje ; Pavić, Ivan ; Zidar, Matija
2019.

Impact of Photovoltaic Power Plants on System Frequency Stability

Baškarad, Tomislav ; Kuzle, Igor
2019.

Technical study for connection of solar power plant Suknovci (8000 kW) to the distribution grid

Baškarad, Tomislav ; Capuder, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Milković, Aleksandar ; Nemec, Darko ; Pandžić, Hrvoje ; Pavić, Ivan ; Zidar, Matija
2019.

Technical study for connection of solar power plant Vrbnik(4500 kW) to the distribution grid

Baškarad, Tomislav ; Capuder, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Milković, Aleksandar ; Nemec, Darko ; Pandžić, Hrvoje ; Pavić, Ivan ; Zidar, Matija
2019.

Effectiveness of Wind Turbine Fast Frequency Response Control on Electrically Distanced Active Power Disturbance Mitigation

Đaković, Josip ; Ilak, Perica ; Baškarad, Tomislav ; Krpan, Matej ; Kuzle, Igor
2018.

Technical study for connection of solar power plant Suknovci (9900 kW) to the distribution grid

Baškarad, Tomislav ; Capuder, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Milković, Aleksandar ; Nemec, Darko ; Pandžić, Hrvoje ; Pavić, Ivan ; Zidar, Matija
2018.

Technical study for connection of the power plant according to the new provisions of the Croatian distribution level connection code

Baškarad, Tomislav ; Đaković, Josip ; Kuzle, Igor
2018.

Modelling of Photovoltaic Power Plant

Baškarad, Tomislav ; Kuzle, Igor
2018.

Analysis of the Wind Generation Impact on Inertial and Primary Frequency Response of the Croatian Electric Power System

Baškarad, Tomislav ; Kuzle, Igor ; Đaković, Josip ; Ilak, Perica
2018.

Technical study for connection of solar power plant Gornji Humac (2000 kW) to the distribution grid

Baškarad, Tomislav ; Capuder, Tomislav ; Đaković, Josip ; Havelka, Juraj ; Holjevac, Ninoslav ; Jerbić, Goran ; Krpan, Matej ; Kuzle, Igor ; Matić, Branimir ; Nemec, Darko ; Milković, Aleksandar ; Pandžić, Hrvoje ; Pavić, Ivan ; Zidar, Matija
2018.

Nonlinear mathematical model of hydroelectric power plant

Baškarad, Tomislav ; Kuzle, Igor ; Tešnjak, Sejid
2017.
Journal of Energy = Energija

Journal papers:

  1. T. Baškarad, N. Holjevac, I. Kuzle and J. Seppänen, "Estimation of Area Frequency Response in Island Operation Mode by Utilizing Interconnected Power System Measurements," in IEEE Transactions on Power Systems, (Q1), doi: 10.1109/TPWRS.2024.3430085
  2. T. Baškarad, N. Holjevac, and I. Kuzle, "A new perspective on frequency control in conventional and future interconnected power systems," in International Journal of Electrical Power & Energy Systems, (Q1), doi: https://doi.org/10.1016/j.ijepes.2023.109731
  3. T. Baškarad, N. Holjevac and I. Kuzle, "Photovoltaic System Control for Power System Frequency Support in Case of Cascading Events," in IEEE Transactions on Sustainable Energy, 2022, (Q1), doi: 10.1109/TSTE.2022.3197687. 
  4. T. Baškarad, N. Holjevac, I. Kuzle, I. Ivanković, "Dynamically adaptive method for under frequency load shedding protection scheme reconfiguration, " in Electric Power Systems Research, Volume 207, 2022, 107823, ISSN 0378-7796, (Q2) https://doi.org/10.1016/j.epsr.2022.107823. 
  5. T. Baškarad, I. Kuzle and N. Holjevac, "Photovoltaic System Power Reserve Determination Using Parabolic Approximation of Frequency Response," in IEEE Transactions on Smart Grid, vol. 12, no. 4, pp. 3175-3184, July 2021, (Q1), doi: 10.1109/TSG.2021.3061893
  6. N. Holjevac, T. Baškarad, J. Đaković, M. Krpan, M. Zidar and I. Kuzle, "Challenges of High Renewable Energy Sources Integration in Power Systems—The Case of Croatia," in Energies 2021, 14, 1047.,(Q3), https://doi.org/10.3390/en14041047
  7. J. Đaković, M.Krpan, P. Ilak, T. Baškarad and I. Kuzle, "Impact of wind capacity share, allocation of inertia and grid configuration on transient RoCoF: The case of the Croatian power system," in International Journal of Electrical Power & Energy Systems, Volume 121, 2020, 106075, ISSN 0142-0615,,(Q1), https://doi.org/10.1016/j.ijepes.2020.106075
  8. T. Baškarad, I. Kuzle, S. Tešnjak, "Nonlinear mathematical model of hydroelectric power plant," in Journal of Energy, vol. 66, no.1-4, pp. 18-39, https://doi.org/10.37798/2017661-494.

Teaching

University graduate

Competences

  • Engineering – general
    Electrical engineering
  • Power engineering and energy
    Power control Power system control Reactive power control Voltage control Photovoltaic cells Energy storage Power engineering Power system simulation Power generation Automatic generation control Solar power generation Photovoltaic systems Power systems Power system dynamics Power system stability Power transmission
  • Power engineering and energy
    Power control Power system control Reactive power control Voltage control Photovoltaic cells Energy storage Power engineering Power system simulation Power generation Automatic generation control Solar power generation Photovoltaic systems Power systems Power system dynamics Power system stability Power transmission

Personal data

Graduation year:
2015.
PhD graduation year:
2023.
Employed in this institution since:
2018.

List of select projects

  1. TRANSITion to sustainable future through training and education, 01.10.2022. – 30.09.2025., Horizon Europe
  2. USBSE - Umreženi stacionarni baterijski spremnici energije, 13. 03. 2020. do 07. 05. 2023., Europski fond za regionalni razvoj
  3. WINDLIPS- WIND energy integration in Low Inertia Power System, 01.01.2018.-31.12.2020., HRZZ&HOPS&HEP Proizvodnja d.o.o.