Evaluation and Improvement of Backup Capacity for Household Electric Vehicle Uninterruptible Power Supply (EV-UPS) Systems

Wenping Zhang (), Yiming Wang, Po Xu, Donghui Li and Baosong Liu
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Wenping Zhang: Department of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
Yiming Wang: Research Center, Ginlong Technologies Co., Ltd., Ningbo 315712, China
Po Xu: Research Center, Ginlong Technologies Co., Ltd., Ningbo 315712, China
Donghui Li: Department of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
Baosong Liu: Research Center, Ginlong Technologies Co., Ltd., Ningbo 315712, China

Energies, 2023, vol. 16, issue 12, 1-20

Abstract: The use of electric vehicles (EVs) for household uninterruptible power supplies (UPSs), particularly in rural areas, can greatly improve household power reliability. However, because EVs are mobile, the evaluation of backup capacity for EV-UPS systems is completely different when compared to traditional UPSs. As a result, the focus of this paper is on the evaluation and improvement of backup capacity for EV-UPS systems. The architectures for EV-UPS systems are presented first. The methodology for calculating backup capacity for EV-UPS systems is then presented, followed by four detailed cases based on different grid failure times. Furthermore, the impact of system operating parameters on backup capacity, such as different load power, EV mobility pattern parameters, and grid outage durations, is investigated. The results of backup capacity in cases of different operating parameters are detailed using an EV mobility model. An improved strategy for increasing backup capacity is proposed, in which more backup energy can be released during a power outage. Meanwhile, the next trip requirement is unaffected. The backup capacity with the improved strategy is then calculated and compared to the results with the traditional strategy. Finally, a 5 kW EV-UPS experimental platform is constructed, and the experimental results are presented to validate the proposed method.

Keywords: EV; UPS; backup capacity; power outage; reliability (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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