One of the key challenges facing distribution network operators today is the expected increase in electric vehicles. The increased load from EV charging will result in distribution assets becoming 'thermally overloaded' due to higher operating temperatures. In addition to the issue of increased load, we have a limited understanding of the behavior and performance of the distribution assets and their potential to accept the increased load. It has been well acknowledged that EVs increase the network loading level, leading to a reduced system reliability performance. These results have not been quantified in a realistic case study, including actual cable rating and design properties. To address this gap, this paper proposes a novel methodology in the existing power network reliability evaluation framework, which quantifies the impact of different EV penetration levels on distribution network reliability, and the thermal performance of distribution cables. Novel approaches using smart switching technology and emergency uprating are proposed to reduce the peak power demand caused by EVs, in order to reinforce the reliability of the grid and to boost the maximum allowable EV penetration in the distribution networks. The methodology was applied using a case study on the modified EV-integrated RBTS bus 4 distribution network. The results showed that the negative impact of EVs on network performance can be mitigated by the implementation of smart switching technology. The peak demand under contingencies can also be accepted by the cables though emergency uprating. The frequency and duration of EV demand interruption was also significantly reduced. Thus, a higher EV penetration can be accommodated.

中文翻译：

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使用智能开关和紧急升级提高电动汽车的渗透率

当今配电网络运营商面临的主要挑战之一是电动汽车的预期增长。由于较高的工作温度，电动汽车充电增加的负载将导致配电资产“热过载”。除了增加负载的问题之外，我们对配电资产的行为和性能以及它们接受增加的负载的潜力的了解也很有限。众所周知，电动汽车会增加网络负载水平，导致系统可靠性性能降低。这些结果尚未在实际案例研究中进行量化，包括实际电缆额定值和设计特性。为了弥补这一差距，本文在现有电网可靠性评估框架中提出了一种新方法，它量化了不同电动汽车普及水平对配电网络可靠性和配电电缆热性能的影响。提出了使用智能开关技术和紧急升压的新方法来降低电动汽车引起的峰值电力需求，以加强电网的可靠性并提高配电网络中允许的最大电动汽车渗透率。该方法是通过对改进的 EV 集成 RBTS 总线 4 配电网络的案例研究来应用的。结果表明，电动汽车对网络性能的负面影响可以通过实施智能开关技术来减轻。突发事件下的高峰需求也可以通过紧急升压被电缆接受。电动汽车需求中断的频率和持续时间也显着减少。因此，