| SM ISO690:2012|
COMENDANT, Ion, PREPELITA, Iulia, TURCUMAN, Lilia. Identifying the Conditions of Maximum Electricity Demand Coverage in a Direct Mode, by Wind and Photovoltaic sources. In: International Conference on Modern Power Systems, 16-17 iunie 2021, Cluj-Napoca. New Jersey, SUA: Institute of Electrical and Electronics Engineers Inc., 2021, Ediția a 9-a, p. 0. ISBN 978-166543381-5. DOI: 10.1109/MPS52805.2021.9492533
|International Conference on Modern Power Systems
Ediția a 9-a, 2021
Conferința "9th International Conference on Modern Power Systems" |
Cluj-Napoca, Romania, 16-17 iunie 2021
To reach the objectives of energy security and updated NDC targets, 100% RES scenario is considered for the R. Moldova. The specific goal of this study is to identify the conditions under which a maximum coverage of the annual electricity demand can be obtained directly from WF+PV sources. Two approaches are used to reach the goal: WF and PV cover energy demand in a direct mode without considering the balancing power-Technical Weight, and second, WF and PV cover the demand in a direct mode together with a source of balancing power-Gas turbine (GT)-Economic Weight. The results obtained: When the capacities of WF and PV are determined in a way to produce electricity equal to annual power demand, Technical Weight is equal to a maximum of 71-72%. If WF and PV electricity produced is higher than demand by 50%, WF+PV tandem may cover the energy demand in a direct mode at maximum level of 80.5%. Five variants of WF, PV and GT economic parameters variation were considered when these sources are operating together. The calculations done and analysis performed showed that: The minimum price of electricity produced by WF+PV+GT in Vl (basic variant, current data) takes place at a PV integration level of lS% (Zopt). At WF specific investment of 750/kW (V2), compared to 1445/kW in Vl, Zopt is equal to zero. That is, at such WF specific investment, PV implementation is not feasible. Price for electricity is lower than in Vl by 25.4%. Even at a specific investment of about 1000/kW for WF, the minimum energy price is obtained in the absence of PV. Decreasing PV specific investment by up to 50% (V3) compared to the level established in Vl has little influence on the maximum Technical Weight. The electricity price is lower than in Vl by circa S%. A 25% decline in TG specific investments (V4), or a 17% drop in the price for natural gas (V5) compared to Vl, have no material effect on the maximum Technical Weight.
wind farms, photovoltaic sources, power demand, balancing power, renewable power supply