The Importance Of PEV

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With the advancement in EV technologies there has been an increasing approval of EVs leading to an increased market share. Gardner et al. (2013) draws the connection between transportation systems and electric power systems and discuss how the market penetration of PEVs a few years down the line could adversely affect the power grid of a city. They suggest ways to accommodate PEVs in the traditional transportation models and emphasizes on the importance of such a model. Range anxiety may cause PEV drivers to take more reliable routes based on energy consumption to avoid running out of charge. The travel patterns are required to be known so that regional power grid operators can provide electricity efficiently and optimally. They also identify the lack of research on traffic assignment models that incorporate PEVs in them. In their framework for evaluating the role of PEVs in transportation infrastructure they assumed 1> PEVs are charged only at home 2> All PEVs have the same range limit 3> PEV drivers and non-PEV drivers are the same from behavioral standpoint. Essentially, the only distinguishing feature of PEVs and non-PEVs was the energy consumption (or emission) rate. Jiang and Xie (2012) anticipate that households will prefer to own both GEVs and BEVs for a long time in the coming years and emphasize the problem of charging infrastructure and charging time which leads to most vehicles being charged either at home or at workplace. We have used this assumption in our tour framework where users charge the vehicle only at the start of the tour. They propose a mathematical formulation of simultaneous mode and route choice mixed equilibrium with GVs and BEVs where the travel impedance comprises of travel time and operating cost. Th... ... middle of paper ... ...est path based algorithms. Even with a single constraint and non-negative costs, the problem is NP-hard in the general case. Lagrangian relaxation based framework (Handler and Zang, 1980) is believed to be efficient for a single constraint like in the traditional constrained shortest path for BEVs. However, various labelling schemes like the one proposed by Desrochers and Soumis (1988) have been used traditionally. Dumitrescu and Boland (2001) propose an exact algorithm based gap closure using weight scaling. They also modify and extend previous pre-processing methods. Pre-processing is an important aspect of solving CSP and can be effective sometimes to reduce the network structure and speed up the algorithm. Dumitrescu and Boland (2003) through numerical experiments show how pre-processing can be effective in certain scenarios in reducing the computational time.

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