LOAD MANAGEMENT STRATEGIES FOR WEAK GRIDS WITH HIGH PENETRATION OF ELECTRIC VEHICLES
by Babak Ravanbach (EUREC 2015-16), DLR-VE, Oldenburg and Peter Klement, Jannick Helms, Benedikt Hanke, Karsten von Maydell
The objective of this paper was to evaluate different load management strategies for weak grids with high penetration of electrical vehicles. The strategies are intended to operate distribution grids close to their physical and operational limits, which are the current rating of the cables and the voltage level for the safe operation of the applied load. Distribution networks are dimensioned based on the expected loads and their simultaneity factor. Problems will occur if the loads exceed the original specification or operation durations. The presented paper addresses the evaluation of load management strategies for two different network topologies. One topology is a stab line which is most sensitive for problems with the supplied operation voltage at the last access point. The second topology is a randomly chosen topology. Five different load management strategies including: Immediate Acceptance (IA), Time Based Shift as Whole (TSW), Time Based Shift and Dispatching for All Remaining Loads (TSD), Time based Shift and Split (TSS), and Optimized Split (OS) were identified and simulated over the selected topologies. Maximizing the load acceptance rate (%) and the total delivered energy (MWh) are identified as the two main parameters to be calculated, optimized and compared amongst strategies.
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