Locational marginal pricing based impact assessment of plug-in hybrid electric vehicles on transmission networks
González Vayá, Marina
Waraich, Rashid A.
- Conference Paper
The electrification of transportation could be an effective strategy for reducing CO 2 emissions. At the same time, a large-scale introduction of plug-in hybrid electric vehicles (PHEVs) and electric vehicles also constitutes a challenge to power systems: Uncontrolled charging would lead to increased load peaks thus potentially overloading system assets. In this paper we take into account the potential flexibility of these new loads and propose a smart charging scheme based on endogenous Locational Marginal Prices. We also assess the potential of Vehicle To Grid (V2G) for peak-shaving by using vehicles to arbitrage intertemporal energy price differences. The method employed is an Optimal Power Flow (OPF), which considers supply and demand side as well as network infrastructure simultaneously. The OPF thus constitutes an appropriate framework to assess the impact of PHEVs on network operation, prices and the energy supply. Within this OPF framework vehicles place demand bids according to their driving patterns and battery state of charge, which are then aggregated at each network location or node. Under V2G this scheme is extended and supply curves are defined taking into account battery degradation costs and round-trip energy losses. Vehicles are modeled individually and their driving patterns are obtained from an agent-based transport simulation. In case studies with one million PHEVs we show that the proposed smart charging method constitutes an improvement compared with uncontrolled charging and even a simple dual tariff, both in terms of load smoothing and lower generation costs. On the other hand battery degradation costs prove too high for a sizeable peak-shaving effect. The proposed framework could also be used for planning purposes as the impact of PHEVs on the infrastructure is assessed Show more
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Book titleBologna: The Electric Power System of the Future − Integrating Supergrids and Microgrids
Pages / Article No.
SubjectPlug-in Hybrid Electric Vehicles (PHEV); smart charging; smart grids; Vehicle to Grid (V2G); Optimal Power Flow (OPF); Locational Marginal Pricing (LMP)
Organisational unit03521 - Axhausen, Kay W.
02226 - NSL - Netzwerk Stadt und Landschaft / NSL - Network City and Landscape
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