Over the past decade, electric vehicle (EV) usage has dramatically increased. For many applications, employing vehicle-to-grid (V2G) and grid-to-vehicle (G2V) schemes can make use of EVs as temporary energy storage systems (ESS). Renewable energy resources can reduce the amount of energy consumed from the electrical grid. However, the electrical power generated from these resources fluctuates and is unpredictable. ESS can play a vital role in mitigating these negative effects, but the technology is still very expensive. Therefore, this study investigates the feasibility of using EVs as a temporary ESS according to system needs. A charging/discharging algorithm is suggested to find the number of EVs that minimizes the overall consumption of electrical energy drawn from the grid. A case study for the Microgrid (MG) system at Jordan University of Science and Technology (JUST) is used to illustrate the proposed algorithm. Results show energy saving of the suggested algorithm by comparing the amount of grid energy consumption before and after the installation of EV charging stations. In this case study, installation of charging stations at JUST reduces energy drawn from the grid, during working hours, by 90%. This reflects an increase in the percent of generated energy locally utilized, in essence reducing the energy injected into the grid for later usage, reducing grid storage fees.

在过去的十年中，电动汽车（EV）的使用量急剧增加。对于许多应用，采用车对网（V2G）和并网（G2V）方案可以将EV用作临时储能系统（ESS）。可再生能源可以减少电网消耗的能量。然而，从这些资源产生的电力波动并且是不可预测的。ESS可以在减轻这些负面影响方面发挥至关重要的作用，但是该技术仍然非常昂贵。因此，本研究根据系统需求调查了将电动汽车用作临时ESS的可行性。建议使用充电/放电算法来找到使从电网汲取的电能的总消耗最小化的电动汽车数量。以约旦科技大学（JUST）的微电网（MG）系统为例，说明了该算法。通过比较电动汽车充电站安装前后的电网能耗，结果表明了该算法的节能效果。在本案例研究中，在JUST上安装充电站可将工作时间内从电网汲取的能量减少90％。这反映了本地利用的发电能量百分比的增加，从本质上减少了注入电网的能量供以后使用，从而降低了电网的存储费用。在本案例研究中，在JUST上安装充电站可将工作时间内从电网汲取的能量减少90％。这反映了本地利用的发电能量百分比的增加，从本质上减少了注入电网的能量供以后使用，从而降低了电网的存储费用。在本案例研究中，在JUST上安装充电站可将工作时间内从电网汲取的能量减少90％。这反映了本地利用的发电能量百分比的增加，从本质上减少了注入电网的能量供以后使用，从而降低了电网的存储费用。