Robust Optimal Dispatching Method for Uncertain Microgrid Including Electric Vehicles

doi:10.11985/2023.02.020

Abstract

Abstract:

Aiming at the load pressure caused by large-scale electric vehicle access to microgrid and the strong uncertainty of users’ electric vehicle charging, models of disordered charging and ordered charging/discharging of electric vehicles are established. At the same time, considering the uncertainty of new energy generation and load demand in the microgrid, a robust optimal dispatch method based on electric vehicles entering the grid is designed in the planning stage. Taking the minimum operating cost as the goal, the model finds the worst scenarios in the uncertain scenes and the operating cost in the two modes of disordered charging and orderly charging/discharging of electric vehicles. In the intraday dispatch stage, the real-time data of renewable energy generation and load demand are used to compensate and fine-tune the day-ahead planning scheme and operating cost under different conservative levels of the microgrid system for forecast errors. Finally, the validity and rationality of the proposed method are verified by simulation examples.

Key words: Microgrid, electric vehicle, disordered charging, ordered charging and discharging, robust optimization, column constraint generation

CLC Number:

TM73

SHAO Siyang, MA Xiang, YUAN Wei, ZHANG Kaiyu, FU Xiaofei, HUANG Chenhong. Robust Optimal Dispatching Method for Uncertain Microgrid Including Electric Vehicles[J]. Journal of Electrical Engineering, 2023, 18(2): 201-209.

Figures/Tables 13

References 22

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参数	数值
Pmin g/kW	40
Pmax g/kW	400
co g, cm g/(元/kW)	0.52, 0.15

参数	数值	参数	数值
Pmax ec/kW	250	Emax e/(kW·h)	1 000
Pmax ed/kW	250	η_ec, η_ed	0.95, 0.95
Emin e/(kW·h)	300	co e/(元/kW)	0.32

指标	Γ_r=0, Γ₁=0		Γ_r=6, Γ₁=12
指标	策略1	策略2	策略1	策略2
日前计划/元	602.4	219.4	1 629.4	1 297.4
日内调整/元	1 279.8	1 336.8	108.9	103.8
总计/元	1 882.2	1 527.0	1 738.3	1 398.3