• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Electric power systems research >Grid harmonic impact of multiple electric vehicle fast charging
【24h】

Grid harmonic impact of multiple electric vehicle fast charging

机译：多种电动汽车快速充电对电网谐波的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Fast charging is perceived by users as a preferred method for extending the average daily mobility of electric vehicles (EV). The rated power of fast chargers, their expected operation during peak hours, and clustering in designated stations, raise significant concerns. On one hand it raises concerns about standard requirements for power quality, especially harmonic distortion due to the use of power electronics connecting to high loads, typically ranging from 18 to 24 kWh. On the other hand, infrastructure dimensioning and design limitations for those investing in such facilities need to be considered. Four sets of measurements were performed during the complete charging cycle of an EV, and individual harmonic's amplitude and phase angles behaviour were analysed. In addition, the voltage and current total harmonic distortion (THD) and Total Demand Distortion (TDD) were calculated and the results compared with the IEEE519, IEC 61000/EN50160 standards. Additionally, two vehicles being fast charged while connected to the same feeder were simulated and an analysis was carried out on how the harmonic phase angles would relate. The study concluded that the use of TDD was a better indicator than THD, since the former uses the maximum current (I-L) and the latter uses the fundamental current, sometimes misleading conclusions, hence it is suggested it should be included in IEC/EN standard updates. Voltage THD and TDD for the charger analysed, were within the standard's limits of 1.2% and 12% respectively, however individual harmonics (11th and 13th) failed to comply with the 5.5% limit in IEEE 519 (5% and 3% respectively in IEC61000). Phase angles tended to have preferential range differences from the fundamental wave. It was found that the average difference between the same harmonic order phase angles was lower than 90 degrees, meaning that when more than one vehicle is connected to the same feeder the amplitudes will add. Since the limits are dependable on the upstream short circuit current (I-SC), if the number of vehicles increases (i.e. I-L), the standard limits will decrease and eventually be exceeded. The harmonic limitation is hence the primary binding condition, certainly before the power limitation. The initial limit to the number of chargers is not the power capacity of the upstream power circuit but the harmonic limits for electricity pollution. (C) 2015 Elsevier B.V. All rights reserved.
机译：用户认为快速充电是延长电动汽车（EV）的平均日移动量的首选方法。快速充电器的额定功率，其在高峰时段的预期运行以及在指定站点中的聚集，引起了人们的极大关注。一方面，它引起了对电能质量标准要求的关注，尤其是由于使用功率电子设备连接到高负载（通常在18至24 kWh范围内）而导致的谐波失真。另一方面，需要考虑那些对此类设施进行投资的人员的基础设施规模和设计限制。在电动汽车的完整充电周期中进行了四组测量，并分析了单个谐波的幅度和相角行为。此外，还计算了电压和电流的总谐波失真（THD）和总需求失真（TDD），并将结果与​​IEEE519，IEC 61000 / EN50160标准进行了比较。此外，模拟了连接到同一馈线的两辆快速充电的车辆，并对谐波相位角之间的关系进行了分析。研究得出结论，使用TDD比THD更好，因为前者使用最大电流（IL），后者使用基波电流，有时会产生误导性结论，因此建议将其包括在IEC / EN标准中更新。分析的充电器电压THD和TDD分别在标准的1.2％和12％的范围内，但是单个谐波（第11和13次）未能满足IEEE 519的5.5％的限制（IEC61000中分别为5％和3％） ）。相角倾向于与基波具有优先的范围差异。结果发现，相同谐波阶次相角之间的平均差小于90度，这意味着当将多台车辆连接到同一馈线时，振幅将相加。由于限制取决于上游短路电流（I-SC），因此如果车辆数量增加（即I-L），则标准限制将降低并最终被超过。因此，谐波限制是主要的约束条件，当然在功率限制之前。充电器数量的最初限制不是上游电源电路的功率容量，而是电力污染的谐波限制。 （C）2015 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号