Methods for increasing the potential of integration of EV chargers into the DC catenary of electric transport grids: A trolleygrid case study

IF 15 1区 工程技术 Q1 ENERGY & FUELS Etransportation Pub Date : 2023-10-01 DOI:10.1016/j.etran.2023.100271
Koen van der Horst, Ibrahim Diab, Gautham Ram Chandra Mouli, Pavol Bauer
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引用次数: 1

Abstract

The traction substations of urban electric transport grids are oversized and underutilized in terms of their capacity. While their over-sizing is an unfortunate waste, their under-utilization creates the major hurdle for the integration of renewables into these grids due to the lack of a base load. Therefore, integrating smart grid loads such as EV chargers is not only an opportunity but a necessity for the sustainable transport grid of the future.

This paper examines six methods for increasing the potential of EV chargers in three case studies of a trolleygrid, namely a higher substation no-load voltage, a higher substation power capacity, a smart charging method, adding a third overheard parallel line, adding a bilateral connection, and installing a multi-port converter between two substations. From the case studies, the most promising and cost-effective method seems to be introducing a bilateral connection, bringing a charging capacity for up to 175 electric cars per day. Meanwhile, other costly and complex methods, such as smart charging with grid state sensors and communication, can offer charging room for over 200 electric cars per day. Furthermore, using solar PV systems to power the grid showed a more than doubling of the directly utilized energy by installing a 150kW charger, from 19% to 41%. This reduces the power mismatch between the trolleygrid and the PV system from 81% to 59% and thereby reduces the severe economic need for storage, AC grid power exchange, or PV power curtailment while allowing a high penetration of renewables.

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提高电动汽车充电器集成到电网直流接触网的潜力的方法:一个有轨电车电网的案例研究
城市电网牵引变电站规模过大,容量利用率不高。虽然它们的超大规模是一种不幸的浪费,但由于缺乏基本负荷,它们的利用率不足成为将可再生能源整合到这些电网中的主要障碍。因此,整合智能电网负载(如电动汽车充电器)不仅是一个机会,而且是未来可持续交通电网的必要条件。本文通过对有轨电车电网的三个案例研究,探讨了提高电动汽车充电器潜力的六种方法,即提高变电站空载电压、提高变电站电力容量、智能充电方法、增加第三偷听平行线路、增加双边连接以及在两个变电站之间安装多端口转换器。从案例研究来看,最具前景和成本效益的方法似乎是引入双边连接,每天为175辆电动汽车提供充电容量。与此同时,其他昂贵而复杂的方法,如带有电网状态传感器和通信的智能充电,每天可以为200多辆电动汽车提供充电空间。此外,使用太阳能光伏系统为电网供电显示,通过安装一个150kW的充电器,直接利用的能源从19%增加到41%,增加了一倍多。这将有轨电车电网和光伏系统之间的功率不匹配从81%减少到59%,从而减少了对存储、交流电网电力交换或光伏电力削减的严重经济需求,同时允许可再生能源的高渗透。
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来源期刊
Etransportation
Etransportation Engineering-Automotive Engineering
CiteScore
19.80
自引率
12.60%
发文量
57
审稿时长
39 days
期刊介绍: eTransportation is a scholarly journal that aims to advance knowledge in the field of electric transportation. It focuses on all modes of transportation that utilize electricity as their primary source of energy, including electric vehicles, trains, ships, and aircraft. The journal covers all stages of research, development, and testing of new technologies, systems, and devices related to electrical transportation. The journal welcomes the use of simulation and analysis tools at the system, transport, or device level. Its primary emphasis is on the study of the electrical and electronic aspects of transportation systems. However, it also considers research on mechanical parts or subsystems of vehicles if there is a clear interaction with electrical or electronic equipment. Please note that this journal excludes other aspects such as sociological, political, regulatory, or environmental factors from its scope.
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