Fast-charging electric buses at bus end-stations can lead to high peak-demand charges for bus operators. A promising method to reduce these peak-demand charges is combining the fast charging station (FCS) with a stationary energy storage unit (SES). This work analyses the potential cost reduction for installing optimally-sized SES at bus FCS on a city scale for different levels of bus-line electrification. Results show that the cost-reduction potential reduces with increasing levels of bus-line electrification. For a case study based on the Singapore bus network, installing an SES at FCS can reduce the total costs by 1.8% on average when 30% of the bus lines are electrified, while the average cost reduction in a fully electrified bus network is 0.4%. A comparison of the results with previous studies showed that the cost reduction potential is highly sensitive to the peak demand pricing method.

公交车站的电动公交车快速充电会给公交运营商带来高额的高峰需求费用。减少这些峰值需求电荷的一种有前途的方法是将快速充电站（FCS）与固定式能量存储单元（SES）结合在一起。这项工作分析了在不同规模的总线电气化水平下，在城市规模的公交FCS上安装最佳尺寸的SES的潜在成本降低。结果表明，随着总线电气化水平的提高，降低成本的潜力也随之降低。对于基于新加坡公交网络的案例研究，在30％的公交线路电气化的情况下，在FCS上安装SES可使总体成本平均降低1.8％，而完全电气化公交网络的平均成本降低0.4％ 。