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Orderly charging strategy for electric vehicles based on multi-level adjustability Teng, Changlong; Ji, Zhenya; Yan, Peng; Wang, Zheng; Ye, Xianglei
International Journal of Renewable Energy Development Vol 13, No 2 (2024): March 2024
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2024.60053

Abstract

The development of electric vehicles (EVs) is one of the essential ways to reduce environmental pollution. With the rapid growth in EVs, an orderly charging strategy based on multi-level adjustable charging power is proposed to address the problem of increasing peak-to-valley difference due to disorderly charging in different scenarios. Based on the information of multi-level adjustable charging power, information about staying in the residential area, and charging demands of EVs, this research designs a centralized charging mode with complete information under the centralized scenario and a decentralized charging mode with incomplete information under the decentralized scenario. This research takes the minimization of peak-to-valley difference in the residential area as the objective function and considers that the charging pile can have the function of multi-level adjustable charging power to support these two scenarios. Two charging modes of the charging pile are designed, and orderly charging model of EVs in the residential area is constructed. EVs can select charging time and charging power by using Bluetooth or code scanning in the charging pile. This research aims to design two orderly charging modes to effectively implement peak shaving and valley filling while ensuring the charging demand of EVs. This research uses the CPLEX solver in MATLAB to solve the objective. The simulation results show that EVs can reasonably select the multi-level adjustable charging power under different scenarios and provide a reference for engineering related to orderly charging. Strategy 4, proposed in this research, has the lowest peak-to-valley difference of the four strategies. The peak-to-valley difference is only 87 kW under the centralized scenario, and the peak-to-valley difference is 282 kW under the decentralized scenario.
A bilevel zonal dispatch strategy considering electric vehicle users' demand response Ji, Zhenya; Zhang, Yuyang; Wang, Zheng; Liu, Lulu; Li, Hao
International Journal of Renewable Energy Development Vol 14, No 4 (2025): July 2025
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.61159

Abstract

With the growing global energy crisis and environmental problems, the large-scale deployment of electric vehicles (EVs) and various types of distributed renewable energy sources has become an important measure to promote sustainable development in China's power sector. However, the rapid increase in the penetration rate of these distributed resources has gradually increased the operational pressure on distribution networks. To effectively address this issue, this paper proposes a two-layer partitioned optimization scheduling strategy for the distribution network layer and the aggregation layer, considering the price-based demand response of EV users. The upper distribution network layer focuses on its own low-carbon and economic operation, establishing a low-carbon economic optimization scheduling model for the distribution network layer to allocate global resources and formulate energy interaction strategies and constraints between aggregation areas based on this. The lower layer first constructs a comprehensive partitioning scheme considering the electrical distance between nodes, the dispatchable potential of EVs, and the power balance of distributed resources. Then, aiming at the economic operation of the aggregation area itself, it establishes a price-based demand response model for EV users to achieve optimal scheduling of distributed resources in the aggregation layer. This study aims to achieve the economic and low-carbon operation of distribution networks through reasonable scheduling strategies, while meeting the charging needs of EVs and improving the utilization efficiency of distributed resources. Simulation results show that the proposed two-layer scheduling strategy can effectively mobilize distributed resources in the distribution network to meet the needs of system economic operation. After optimization at the distribution network layer, the daily operating cost is reduced from 11,551.88 yuan to 6,220.84 yuan, significantly improving economic benefits. Electric vehicles have achieved a reduction of 21.1% in load peak shaving. In conclusion, the two-layer partitioned optimization scheduling strategy proposed in this paper can effectively utilize distributed resources in distribution networks, reduce operation costs, and achieve economic and low-carbon operation of distribution networks.