Mobile energy storage charging pile price standard

Therefore, the lowest electricity cost 0.4 yuan/kWh is employed for calculation for fixed charging piles, even lower than that of the residential electricity price. Table 1. Input parameters for users' convenience and expenses. The power of mobile charging piles that we have developed is 7 kW so far.

Based on the real-time collected basic load of the residential area and with a fixed maximum input power from the same substation, calculate the maximum operating power of the energy storage-based charging pile for each time period: (1) P m (t h) = P am − P b (t h) = P cm (t h) − P dm (t h)

There is no delivery cost for a fixed charging pile. However, the user has to drive the EV to a charging station. Therefore, the total cost of fixed charging is composed of electricity cost and time cost. The results show that if the cost of time is not considered, fixed charging costs 12–60 yuan.

Moreover, our model analyses reveal that, under the condition of low utilization rate of fixed charging piles, the levelized cost of electricity for mobile charging piles is much less. Besides, the land cost also plays a role; when it increases, mobile charging piles could be even more economically competitive. 1. Introduction

Based Eq., to reduce the charging cost for users and charging piles, an effective charging and discharging load scheduling strategy is implemented by setting the charging and discharging power range for energy storage charging piles during different time periods based on peak and off-peak electricity prices in a certain region.

By using the energy storage charging pile's scheduling strategy, most of the user's charging demand during peak periods is shifted to periods with flat and valley electricity prices. At an average demand of 30 % battery capacity, with 50–200 electric vehicles, the cost optimization decreased by 18.7%–26.3 % before and after optimization.