Optimal charging strategies for the electric vehicles in a parking lot integrated with energy storage and solar PV systems | |
| Author | Sharma, Sadiksha Neupane |
| Call Number | AIT Thesis no.ET-21-05 |
| Subject(s) | Battery charging stations (Electric vehicles) Electric vehicles--Batteries Photovoltaic power systems |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Energy |
| Publisher | Asian Institute of Technology |
| Abstract | The intervention of disruptive technology like Electric vehicles, Energy storage system and renewables like solar Photovoltaics is must and have been prioritized in the past decade via demand-pull and technology-push methods. Future projections predict that significant growth of the EVs, ESS and PV requires the proper integration approaches to the existing power system infrastructures. Further, if these three technologies can be integrated into a single system, then they supplement each other than having only one technology. EVs are treated as the new low carbon transport option, the true intention of having EVs will not be justified as more power plants need to set up for meeting the demands of the increasing number of EVs. Thus, this study examines the energy cost of various charging strategies of EVs for the commercial parking nearby office whose working time shifts are mostly fixed for the normal working day, taking advantage of the Time of Use Tariffs. Thus, in order to effectively improve the utilization rate of solar energy resources and to develop sustainable urban efficiency, an integrated system of electric vehicle charging station,photovoltaic (PV) system, and battery energy storage system has been proposed and implemented in many cities around the world. This paper proposes an optimization model for grid-connected photovoltaic,battery energy storage electric vehicle charging station (PBES) in parking lot and determines the charging/discharging pattern of BESS. The study mainly deals with the energy cost minimization and profit maximization from the perspectives of parking lot owners through the incorporation of the Energy storage system, which will be charged during the time when TOU tariffs are low and are discharged to EVs during periods of high tariffs. Also, to decrease the reliance on the main grid, the PV system is used, which entire generation will be fed to the EVs during the day. Based on the simulation result, it has been observed the parking lot owner benefits are more in case of the coordinated charging with compared to the uncoordinated charging strategies by 7% for one day. The benefits are further increased to 23% when an energy storage system is used to supply the demand of the EVs for coordinated charging. The benefits further rose to 43% with ESS and PV systems compared to charging scenarios with only ESS.The pay back period of the system integrated with ESS and PV both without considering investment cost is 0.93 Years while with ESS only is 3.66 Years and with PV only is 4.12 Years. |
| Year | 2021 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Energy Technology (ET) |
| Chairperson(s) | Singh, Jai Govind |
| Examination Committee(s) | Weerakorn Ongsakul;Salam, P. Abdul |
| Scholarship Donor(s) | BANGCHAK Scholarship;Asian Institute of Technology Fellowship |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2021 |