- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Photovoltaics and opportunistic electric vehicle charging in the power system – a case study on a Swedish distribution grid
摘要： Renewable distributed generation and electric vehicles (EVs) are two important components in the transition to a more sustainable society. However, both pose new challenges to the power system due to the intermittent generation and EV charging load. In this case study, a power system consisting of a low- and medium-voltage rural and urban distribution grid with 5174 customers, high penetration of photovoltaic (PV) electricity and a fully electrified car fleet were assumed, and their impact on the grid was assessed. The two extreme cases of two summer weeks and two winter weeks with and without EV charging and a PV penetration varying between 0 and 100% of the annual electricity consumption were examined. Active power curtailment of the PV systems was used to avoid overvoltage. The results show an increased electricity consumption of 9.3% in the winter weeks and 17.1% in the summer weeks, a lowering of the minimum voltage by 1% at the most, and a marginal contribution by the EV charging to lower the need of PV power curtailment. This shows the minor impact of EV charging on the distribution grid, both in terms of allowing more PV power generation and in terms of lower voltage levels.
关键词： distribution grid,photovoltaic,voltage levels,power curtailment,electric vehicle
更新于2025-09-16 10:30:52
-
[IEEE IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society - Lisbon, Portugal (2019.10.14-2019.10.17)] IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society - Design and Control of a Photovoltaic-Fed Dc-Bus Electric Vehicle Charging Station
摘要： This paper presents a stand-alone dc-bus Electric Vehicle (EV) charging station system using a photovoltaic (PV) source. The proposed topology includes a PV panel, an energy storage unit (ESU), and two EVs. Each unit is controlled independently; a voltage regulation scheme is implemented within the ESU converter to ensure the dc bus voltage is maintained at the nominal level under varying operating conditions. Two different operating scenarios are studied, and the results confirm that the algorithm developed allows regulating the dc bus voltage either with varying solar irradiance or when EVs are connected and disconnected from the dc grid. The proposed design offers lower energy conversion losses compared to the ac configuration and reduces energy demand on the existing ac distribution grid. It also finds applications in remote areas where parking facilities are provided for recreational purpose.
关键词： Electric Vehicle,Charging Stations,Photovoltaic,Energy Storage,Voltage control
更新于2025-09-16 10:30:52
-
A Novel Charging and Discharging Algorithm of Plug-in Hybrid Electric Vehicles Considering Vehicle-to-Grid and Photovoltaic Generation
摘要： Considering, the high penetration of plug-in electric vehicles (PHEVs), the charging and discharging of PHEVs may lead to technical problems on electricity distribution networks. Therefore, the management of PHEV charging and discharging needs to be addressed to coordinate the time of PHEVs so as to be charged or discharged. This paper presents a management control method called the charging and discharging control algorithm (CDCA) to determine when and which of the PHEVs can be activated to consume power from the grid or supply power back to grid through the vehicle-to-grid technology. The proposed control algorithm considers fast charging scenario and photovoltaic generation during peak load to mitigate the impact of the vehicles. One of the important parameters considered in the CDCA is the PHEV battery state of charge (SOC). To predict the PHEV battery SOC, a particle swarm optimization-based artificial neural network is developed. Results show that the proposed CDCA gives better performance as compared to the uncoordinated charging method of vehicles in terms of maintaining the bus voltage profile during fast charging.
关键词： state of charge,artificial neural network,particle swarm optimization,plug-in hybrid electric vehicle,charging and discharging control algorithm
更新于2025-09-16 10:30:52
-
Economic and environmental assessment of reusing electric vehicle lithium-ion batteries for load leveling in the residential, industrial and photovoltaic power plants sectors
摘要： Reaching 70–80% of primary capacity, lithium-ion batteries must be replaced in electric vehicles. However, they could be reused in other applications such as energy storage stations. In this paper, an economic evaluation of reusage of lithium-ion packs for load leveling in the residential, industrial and photovoltaic power plants sectors have been investigated from subscriber and government aspects. Several repurposed electric vehicle battery packs have been taking into account for different tariffs and scenarios. It is found that utilization of battery can reduce electricity bill for residential consumers by 14.25% based on the current electricity market and 39.75% if the fine of the peak time consumption is tripled. However, the current subsidy rate in the electricity tariffs is the main barrier in terms of the payback period for homeowners. Moreover, it is found that decrease in the battery prices by 2035 as the only factor will not justify usage of repurposed battery in residential sector, furthermore, tariffs must also be regulated. Sensitivity analysis declared that a 20% reduction in the price of battery in residential sector, affects the internal rate of return by 164%. Meanwhile, increasing in the on-peak tariff can fluctuate it by 44%. Reusing electric vehicle batteries could be more profitable in the industrial sector due to the realistic tariff. In addition to the operation cost, government saving is analyzed from the initial cost aspect. Results illustrated that utilization of repurposed battery packs can reduce construction costs of new on-peak thermal power plants by 72.5% and 82% in the residential and industrial sectors, respectively. Finally, the effect of using repurposed lithium-ion battery packs on the emission rates of greenhouse gases and other air pollutants are surveyed. The reused batteries can be employed to achieve sustainable development.
关键词： Load leveling,Secondary use,Lithium-ion battery,Environmental analysis,Electric vehicle,Economic analysis
更新于2025-09-16 10:30:52
-
Cooperative Management for PV/ESS-Enabled Electric-Vehicle Charging Stations: A Multi-Agent Deep Reinforcement Learning Approach
摘要： This paper proposes a novel multi-agent deep reinforcement learning method for the energy management of distributed electric vehicle charging stations with a solar photovoltaic system and energy storage system. In the literature, the conventional method is to calculate the optimal electric vehicle charging schedule in a centralized manner. However, in general, the centralized approach is not realistic under certain environments where the system operators for multiple electric vehicle charging stations handle dynamically varying data, such as the status of the energy storage system and electric vehicle-related information. Therefore, this paper proposes a method that can compute the scheduling solutions of multiple electric vehicle charging stations in a distributed manner while handling run-time time-varying dynamic data. As shown in the data-intensive performance evaluation, it can be observed that the proposed method achieves a desirable performance in terms of reducing the operation costs of electric vehicle charging stations.
关键词： solar photovoltaic system,energy management,electric vehicle charging stations,multi-agent deep reinforcement learning,energy storage system
更新于2025-09-16 10:30:52
-
Impacts on the Output Power of Photovoltaics on Top of Electric and Hybrid Electric Vehicles
摘要： This paper investigates the potential output power of a photovoltaic (PV) installation on top of battery-powered electric vehicles (BEVs) and hybrid electric vehicles (HEVs). Firstly, we discuss the available area on the roof of BEVs and HEVs for deploying PV cells. Secondly, we verify the impact of the vehicles curved roof surface on the available output power of photovoltaics. More precisely, we present a method of calculating the effective area of PV cells, useful for PV simulation models and calculating the available output power of PV cells with different longitudinal angles. We verify our method within experiments and present the results of them, showing that the model predicts the output power of PV cells with an accuracy better than 2.5%. Furthermore, we discuss the impact of the curved surface and ambient conditions on possible interconnections of PV cells. Here, we present considerations for both, stationary and moving conditions, to highlight the dif?culties for interconnecting PV cells to form PV panels. From our experimental results, for frequent changes in the available solar radiation level, we can see a difference in terms of output power larger than 75% between series and parallel interconnections of PV cells.
关键词： battery-powered electric vehicle,photovoltaic energy,solar energy,simulation,data acquisition,measurement,environmental data,hybrid electric vehicle
更新于2025-09-12 10:27:22
-
[IEEE 2019 Electric Vehicles International Conference (EV) - Bucharest, Romania (2019.10.3-2019.10.4)] 2019 Electric Vehicles International Conference (EV) - Modelisation of Hydrogen Production using Photovoltaic Electrolysis
摘要： The Electric Vehicle (EV) technology addresses the issue of the reduction of greenhouse gas emissions (GHG). Normally, EVs are recharged with electricity generated from conventional energy sources. For full clean mobility and to have zero emissions and favorable environmental impact, it is better to charge the vehicles from Renewable Energies Systems (RESs). Using RESs for producing hydrogen is a main method to store RESs. This option is required to integrate energy storage system based on hydrogen storage. Hydrogen can be produced by using solar photovoltaic energy for the electrolysis of water. This paper focuses on the Proton Exchange Membrane Electrolyzer (PEME) and covers a board array of subjects linked to this electrolyzer. Gives a control oriented modeling of the PEME, as well as the auxiliary system for the hydrogen production process. In fact, PEME is the most suitable for transforming electricity from RESs. In this context, the present paper describes the essential steps of hydrogen production from the photovoltaic solar energy through PEME, in order to describe the various phenomena related to this technology.
关键词： Modeling and optimization,Hydrogen storage,PEM electrolyzer,Electric vehicle
更新于2025-09-12 10:27:22
-
Simulating the charging of electric vehicles by laser
摘要： At present, wired and wireless charging methods for electric vehicles (EVs) have a number of drawbacks including short charging ranges and long charging times. Laser power transfer (LPT) is a wireless power transfer technique which can be used for UAV (unmanned aerial vehicle) and satellite charging. Recent developments in photovoltaic cells and laser technology allows the transfer power using light which might overcome many of the issues related with other charging methods. In this paper, we describe the design and implementation (in MATLAB) of a novel, high-power charging method using a laser (monochromatic light) to charge electric vehicles. The paper examines the overall efficiency of the LPT for a various input power-level. In addition, it also examines the safety and the possible charging infrastructure for LPT technology. Using this technique, we believe that an overall efficiency of 10-37% can be achieved using existing technology.
关键词： Wireless charging,LPT,Electric vehicle
更新于2025-09-12 10:27:22
-
[IEEE 2019 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) - Auckland, New Zealand (2019.5.20-2019.5.23)] 2019 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) - Calculating the Output Power of Photovoltaic Cells on Top of Electric and Hybrid Electric Vehicles
摘要： This paper investigates the potential output power of a photovoltaic (PV) installation on top of battery-powered electric vehicles (BEVs) and hybrid electric vehicles (HEVs). Firstly, we discuss the available area on the roof of BEVs and HEVs for deploying PV cells. Secondly, we verify the impact of the curved surface on the available output power of photovoltaics. Furthermore, we discuss the impact of the curved surface and the ambient conditions on the possible alignment of PV cells. Here, we present a method of calculating the effective area of PV cells, useful for PV simulation models and calculating the available output power of PV cells with different longitudinal angles. Finally, we verify our method within experiments and present the results of them, showing that the model predicts the output power of PV cells with an accuracy better than 2.5%.
关键词： data acquisition,solar energy,environmental data,simulation,battery-powered electric vehicle,photovoltaic energy,measurement,hybrid electric vehicle
更新于2025-09-11 14:15:04
-
[IEEE 2019 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) - Auckland, New Zealand (2019.5.20-2019.5.23)] 2019 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) - Moving Photovoltaic (PV) Installations: Impacts of the Solar Radiation Level on the Output Power
摘要： This paper investigates the potential output power of moving photovoltaic (PV) installations. In particular, we focus on the impacts of the solar radiation level on the available output power of PV installations on top of moving objects. We discuss the situation for controlling the operating voltage of photovoltaics installed on top of battery-powered electric vehicles (BEVs) and hybrid electric vehicles (HEVs). We demonstrate that different longitudinal angles of PV cells due to curved roof surfaces and the fast slopes of the solar radiation level have a significant impact on the maximum power point tracking (MPPT) algorithm. We illustrate how the solar radiation level can reduce the efficiency of the MPPT algorithms.
关键词： data acquisition,photovoltaic energy,battery-powered electric vehicle,measurement,hybrid electric vehicle
更新于2025-09-11 14:15:04