Tag Archives: renewable resources

553-562 M. Märss,, A. Annuk, A. Allik and J. Uiga
AC-link based new microgrid system for research of local power flow management
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AC-link based new microgrid system for research of local power flow management

M. Märss¹⋅²,*, A. Annuk¹, A. Allik¹ and J. Uiga¹

¹Institute of Technology, Estonian University of Life Sciences, Kreutzwaldi 56, EE51014 Tartu, Estonia 2Tallinn University of Technology, Department of Electrical Engineering, Ehitajate tee 5, EE19086 Tallinn, Estonia; *Correspondence: maido.marss@emu.ee

Abstract:

This paper gives an overview of a distributed energy technology laboratory, where diverse approaches are studied to effectively integrate distributed generation into power systems. The laboratory is equipped with small-scale power generation devices including wind turbine (3.5 kW), PV array (2.5 kW), synthetic energy generator (3.6 kW) and also batteries, ultra capacitor, programmable load (6.2 kW), weather station, power flow and power quality control and monitoring system. The laboratory is used for researching and applying energy-management technics to control energy storage and increasing power reliability and power quality in small-scale generation units. On-site measured data of power consumption and production can be linked to the laboratory and simulated online with synthetic energy generator and programmable load. It is also possible to scale the measured data and model systems with variable sizes. As a result the stability of variable systems can be tested with different storage capacities and load management techniques.

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357-366 V. Osadcuks, A. Pecka and R. Selegovskis
Energetic balance of autonomous hybrid renewable energy based EV charging station in winter conditions
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Energetic balance of autonomous hybrid renewable energy based EV charging station in winter conditions

V. Osadcuks*, A. Pecka and R. Selegovskis

Faculty of Engineering, Latvia University of Agriculture, J. Cakstes blvd. 5.,LV-3001 Jelgava, Latvia; *Correspondence: vtl@tvnet.lv

Abstract:

The paper presents an experimental research on energetic balance of an autonomoushybrid renewable energy based electric vehicle (EV) charging station. The experimental chargestation is located in the central part of Latvia in Jelgava city. The station is built using standardsmall-scale hybrid power system equipment: 24 V 300 Ah lead-acid battery, 2 kW photovoltaicarray, 300 W wind generator, hybrid charge controller and 1.6 kW inverter. The station iscapable to perform mode 1 EV charging (220 V, 50 Hz, up to 1.6 kW). The aim of the researchis to evaluate the operational possibilities, technical self-consumption and overall energybalance of the renewable resources based station during a winter period. Analysis on availablepower for EV charging, self-consumption and affecting environmental factors during a 6-dayperiod is performed. The time period was chosen to include days with temperatures below andabove zero and various levels of solar irradiation. Conclusions about possibilities andusefulness of winter-period exploitation are given.

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