The high utilization level of renewable generation including residential photovoltaic (PV) systems together with the uncontrolled charging of electric vehicles (EVs) can have a significant impact on load characteristi...The high utilization level of renewable generation including residential photovoltaic (PV) systems together with the uncontrolled charging of electric vehicles (EVs) can have a significant impact on load characteristics in distribution networks. Harmonic content of PV generation, EV charging loads, and their influence on power quality indicators in residential distribution networks are discussed in this paper. For investigating likely power quality scenarios, PV generation and EV charging measurement results including current harmonic amplitude and phase angle values are used and compared with present load characteristics. Different modelling scenarios are analysed and a simplified model of harmonics in PVs and EVs is offered. The results of the study show moderate additional harmonic distortion in residential load current and voltage distortion at the substation’s busbar when PV generation and EV loading are added. The scenarios presented in this paper can be further used for modelling the actual harmonic loads of the PVs and EVs in distribution networks.展开更多
道路全息测绘是新型基础测绘体系建设的重要组成部分之一。相较于传统道路测绘成果,道路全息测绘产品具有信息更全面、更精细、更准确及更易于更新的特点。本文以道路全息测绘应用为目标,结合车载移动测量的技术优势,提出了从移动测量...道路全息测绘是新型基础测绘体系建设的重要组成部分之一。相较于传统道路测绘成果,道路全息测绘产品具有信息更全面、更精细、更准确及更易于更新的特点。本文以道路全息测绘应用为目标,结合车载移动测量的技术优势,提出了从移动测量车数据采集、数据处理到道路全息测绘产品制作的完整流程,制作了静态高清道路地图、精细道路三维模型和自动驾驶高精地图3种新型道路全息测绘产品。此外,以武汉市中心城区3 km 2试验区内的市政道路作为研究对象,开展了道路全息测绘产品生产应用试验。结果表明,该成果精度不仅能满足1∶500地形图更新等传统城市测绘工作需求,也可为自动驾驶提供重要的道路数据基础。展开更多
文摘The high utilization level of renewable generation including residential photovoltaic (PV) systems together with the uncontrolled charging of electric vehicles (EVs) can have a significant impact on load characteristics in distribution networks. Harmonic content of PV generation, EV charging loads, and their influence on power quality indicators in residential distribution networks are discussed in this paper. For investigating likely power quality scenarios, PV generation and EV charging measurement results including current harmonic amplitude and phase angle values are used and compared with present load characteristics. Different modelling scenarios are analysed and a simplified model of harmonics in PVs and EVs is offered. The results of the study show moderate additional harmonic distortion in residential load current and voltage distortion at the substation’s busbar when PV generation and EV loading are added. The scenarios presented in this paper can be further used for modelling the actual harmonic loads of the PVs and EVs in distribution networks.
文摘道路全息测绘是新型基础测绘体系建设的重要组成部分之一。相较于传统道路测绘成果,道路全息测绘产品具有信息更全面、更精细、更准确及更易于更新的特点。本文以道路全息测绘应用为目标,结合车载移动测量的技术优势,提出了从移动测量车数据采集、数据处理到道路全息测绘产品制作的完整流程,制作了静态高清道路地图、精细道路三维模型和自动驾驶高精地图3种新型道路全息测绘产品。此外,以武汉市中心城区3 km 2试验区内的市政道路作为研究对象,开展了道路全息测绘产品生产应用试验。结果表明,该成果精度不仅能满足1∶500地形图更新等传统城市测绘工作需求,也可为自动驾驶提供重要的道路数据基础。