Enhancing electric vehicle penetration and grid operation performance in old residential communities through hybrid AC/DC microgrid reconstruction

Yu, Hang1,2; Lei, Xiang2; Niu, Songyan1,2; Shao, Ziyun3; Jian, Linni1,2,4

2023-10-01

10.1016/j.apenergy.2023.121459

APPLIED ENERGY   影响因子和分区

0306-2619

1872-9118

The widespread popularity of electric vehicles (EVs) imposes great challenges for distribution grids, such as feeder congestion, voltage deviation, and so forth. Although building new electrical facilities is feasible to release more capacity for EV integration, this is not a wise scheme to be applied in old residential communities owing to huge costs and limited spaces. In light of this, the paper proposes an easy-to-implement and cost-effective hybrid AC/DC microgrid reconstruction scheme for low-voltage distribution grids of old residential communities. The advanced power electronic device called smart interlinking unit (SIU) is incorporated in prior power distribution rooms of residential communities, featuring integrated structure, dedicated interfaces, and flexible control capability. The SIU-based architecture reuses existing redundant transformers and power lines to form AC/DC subgrids. An outstanding transfer capacity improvement and power loss reduction via the DC renovation are quantified. Considering the varied efficiency characteristics of multiple power converters and transformers, a hierarchical coordinated operation strategy is proposed for this architecture to realize the overall energy-saving operation. The optimal operation point tracking and AC/DC voltage regulation are included in the strategy design. Regarding the target scenario in the case study, the adopted reconstruction scheme would achieve a significant 297% of the maximum EV penetration. The real-time voltage regulation for AC and DC feeders is also realized to avoid possible voltage violations. Additionally, the proposed architecture and operation strategy could obtain about 10% of load ratio improvement and 1.5% of average efficiency promotion compared to the traditional AC architecture.

Electric vehicles (EVs) Hybrid AC DC microgrid Coordinated operation strategy System reconstruction

SCI ; EI

英语

第一 ; 通讯

Science and Technology Innovation Committee of Shenzhen[JCYJ20220530113008019]

Energy & Fuels ; Engineering

Energy & Fuels ; Engineering, Chemical

WOS:001029986000001

ELSEVIER SCI LTD

20232714345524

Electric loads ; Electric power distribution ; Electric utilities ; Energy conservation ; Housing ; Vehicle performance ; Voltage distribution measurement ; Voltage regulators

Urban Planning and Development:403.1 ; Energy Conservation:525.2 ; Automobiles:662.1 ; Heavy Duty Motor Vehicles:663.1 ; Electric Power Systems:706.1 ; Electric Power Distribution:706.1.2 ; Control Equipment:732.1 ; Industrial Economics:911.2 ; Electric Variables Measurements:942.2

ENGINEERING

Web of Science

1.Southern Univ Sci & Technol, Jiaxing Res Inst, Jiaxing 314000, Peoples R China
2.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
3.Guangzhou Univ, Sch Elect & Commun Engn, Guangzhou 510006, Peoples R China
4.Southern Univ Sci & Technol, Shenzhen 518055, Peoples R China

Yu, Hang,Lei, Xiang,Niu, Songyan,et al. Enhancing electric vehicle penetration and grid operation performance in old residential communities through hybrid AC/DC microgrid reconstruction[J]. APPLIED ENERGY,2023,347.

Yu, Hang,Lei, Xiang,Niu, Songyan,Shao, Ziyun,&Jian, Linni.(2023).Enhancing electric vehicle penetration and grid operation performance in old residential communities through hybrid AC/DC microgrid reconstruction.APPLIED ENERGY,347.

Yu, Hang,et al."Enhancing electric vehicle penetration and grid operation performance in old residential communities through hybrid AC/DC microgrid reconstruction".APPLIED ENERGY 347(2023).