Real-time load scheduling and storage management for solar powered network connected EVs

Ashfaq Ahmad, Jamil Yusuf Khan

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, we investigate a joint real-time load scheduling and energy storage management at a grid-connected solar powered electric vehicle. Without any a priori knowledge, we consider a finite time approach with arbitrary dynamics of system inputs. Our aim is to minimize an average aggregated system cost through joint optimization of electric vehicle's energy procurement price, load scheduling delays, photovoltaic sufficiency in terms of locally generated renewable energy mix, and battery degradation. Through subsequent modification and reformulation of the joint optimization problem, we utilize the concept of one-slot look-ahead queue stability to solve the problem by employing the Lyapunov optimization technique. We show that the joint optimization problem is separable into sub-problems, which are sequentially solved with asymptotic optimality and a bounded performance guarantee. Simulations are carried in different scenarios and under varying weather conditions. Results show that our proposed algorithm can achieve a daily electric vehicle's photovoltaic sufficiency up to 50.50%, a monthly bill reduction up to 72.61%, and a yearly reduced CO_2 emission level up to 6.06 kg, while meeting electric vehicle user's energy and delay requirements.

Original languageEnglish
Article number8731703
Pages (from-to)1220-1235
Number of pages16
JournalIEEE Transactions on Sustainable Energy
Volume11
Issue number3
Early online date5 Jun 2019
DOIs
Publication statusPublished - Jul 2020

Keywords

  • charging station
  • energy storage
  • load scheduling
  • optimization
  • photovoltaic generation
  • photovoltaic sufficiency
  • Real-time

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