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33 results on '"Topic, Danijel"'

3. Simulation of the Grid Connected Battery Storage with Ability of Active and Reactive Power Control

Author

Šimić, Zvonimir, Bilandžić, Josip, Topić, Danijel, Damjanović, Antun, Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Glavaš, Hrvoje, editor, Hadzima-Nyarko, Marijana, editor, Karakašić, Mirko, editor, Ademović, Naida, editor, and Avdaković, Samir, editor

Published
2022
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11. Performance Assessment of TSO–DSO using Volt-Var Control at Smart-Inverters

Author

Astapov, Victor, Trashchenkov, Sergei, Gonzalez-Longatt, Francisco, and Topic, Danijel

Subjects
Ancillary service, control, distribution grid, DG, DSO, PowerFactory, reactive power control, reactive power management, RES, smart inverter, TSO, voltage control
Abstract

The massive penetration of distributed energy resources (DERs) in distribution networks provides a strategic opportunity for the distribution system operator (DSO) to coordinate the assets appropriately and offer services to the transmission systems. The IEEE std. 1547-2018 introduced a control mechanism to enable the power electronic converters (PECs) to offer several services, including voltage regulation by controlling the reactive power injection/absorption; this type of PECs is also known as "smart inverter". The participation of the smart-inverters in the voltage regulation with a novel customer-centred piece of legislation and markets provide the DSO with powerful tools to enforce very positive TSO/DSO interactions. This research paper presents a comprehensive assessment of the steady-state performance provided by voltage control at the smart-inverters to the TSO – DSO system. The assessment includes analysing main indicators using time series considering short term (24-hours, 1-minute resolution) and long-term (one-year) horizon. In this paper, the three leading indicators are used as criteria for the assessment: total energy losses voltage profile in the TSO-DSO system and the power flow interaction at the interface between the systems. The assessment is based on numerical results using the DIgSILENT PowerFactory simulation tool, where the voltage controllers have been implemented, and regional electrical system in south-eastern Norway, the area of Vestfold and Telemark as been used for illustrative purposes

Published
2022

33. Cost-benefit comparison of on-grid photovoltaic systems in Pannonian parts of Croatia and Serbia

Author

Sljivac, Damir, Nakomcic-Smaragdakis, Branka, Marko Vukobratovic, Topic, Danijel, and Cepic, Zoran

Subjects
analiza isplativosti, mrežni fotonaponski sustavi, obnovljivi izvori energije, poticajna cijena, potencijali sunčeve energije, tarifni sustav, cost-benefit analysis, feed-in tariff system, incentive price, on-grid photovoltaic power systems, renewable energy, solar energy potentials
Abstract

Rad predstavlja detaljnu analizu potencijala sunčeve energije i analizu isplativosti instaliranja fotonaponskih sustava u Panonskim dijelovima Hrvatske i Srbije. Uspoređeni su tarifni sustavi za poticanje proizvodnje iz električne energije pomoću mrežnih fotonaponskih sustava i time rezultirajućom dobiti s jedne strane s trenutnim investicijskim i pretpostavljenim troškovima održavanja i pogona tijekom životnog vijeka s druge strane. PVGIS – PhotoVoltaic Geographical Information System korišten je za podatke o sunčevom zračenju i proračunu očekivane proizvodnje električne energije iz fotonaponskih sustava nazivne snage do 10 kW, 30 kW, 300 kW i preko 300 kW (prema različitim poticajnim tarifama u Hrvatskoj) Rezultati pokazuju značajne razlike u razvoju fotonaponskog tržišta u Hrvatskoj i Srbiji i potrebu daljnjeg poboljšanja sustava poticaja i legislative u Srbiji kako bi se instaliranje fotonaponskih sustava učinilo izvodivim., The paper presents detailed comparison of solar energy potentials and cost-benefit analysis of installing photovoltaic power systems in Pannonian parts of Croatia and Serbia. Feed-in tariff systems for incitement of the electricity production from on-grid photovoltaic power systems and the resulting benefits on one side and the current investment and the projected life-time operation and maintenance cost on the other side, have been compared. PVGIS – PhotoVoltaic Geographical Information System have been used for data on solar irradiation and calculation of expected electricity production from PV systems with rated power up to 10 kW, 30 kW, 300 kW and over 300 kW (according to the different feed-in tariffs in Croatia). The results indicate substantial differences in PV markets development in Croatia and Serbia and the necessity to improve feed-in tariffs and legislation in Serbia in order to make the installation of PV systems feasible.

Published
2014

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