The rapidly increasing penetration of electric vehicles(EVs) in modern metropolises has been witnessed during the past decade, inspired by financial subsidies as well as public awareness of climate change and environm...The rapidly increasing penetration of electric vehicles(EVs) in modern metropolises has been witnessed during the past decade, inspired by financial subsidies as well as public awareness of climate change and environment pro-tection. Integrating charging facilities, especially highpower chargers in fast charging stations, into power distribution systems remarkably alters the traditional load flow pattern, and thus imposes great challenges on the operation of distribution network in which controllable resources are rare. On the other hand, provided with appropriate incentives, the energy storage capability of electric vehicle offers a unique opportunity to facilitate the integration of distributed wind and solar power generation into power distribution system. The above trends call for thorough investigation and research on the interdependence between transportation system and power distribution system. This paper conducts a comprehensive survey on this line of research. The basic models of transportation system and power distribution system are introduced,especially the user equilibrium model, which describes the vehicular flow on each road segment and is not familiar to the readers in power system community. The modelling of interdependence across the two systems is highlighted.Taking into account such interdependence, applications ranging from long-term planning to short-term operation are reviewed with emphasis on comparing the description of traffic-power interdependence. Finally, an outlook of prospective directions and key technologies in future research is summarized.展开更多
Batteries have been widely applied in many high-power applications,such as electric vehicles(EVs)and hybrid electric vehicles,where a suitable battery management system(BMS)is vital in ensuring safe and reliable opera...Batteries have been widely applied in many high-power applications,such as electric vehicles(EVs)and hybrid electric vehicles,where a suitable battery management system(BMS)is vital in ensuring safe and reliable operation of batteries.This paper aims to give a brief review on several key technologies of BMS,including battery modelling,state estimation and battery charging.First,popular battery types used in EVs are surveyed,followed by the introduction of key technologies used in BMS.Various battery models,including the electric model,thermal model and coupled electro-thermal model are reviewed.Then,battery state estimations for the state of charge,state of health and internal temperature are comprehensively surveyed.Finally,several key and traditional battery charging approaches with associated optimization methods are discussed.展开更多
随着太阳能资源的广泛利用,光伏发电技术也日益受到重视。蓄电池作为光伏系统重要的组成部分,使用寿命受光伏系统的间歇性与随机性影响。常见的蓄电池充电策略存在光伏电池发电利用率低,充电速率慢和寿命短的问题。针对以上问题,结合光...随着太阳能资源的广泛利用,光伏发电技术也日益受到重视。蓄电池作为光伏系统重要的组成部分,使用寿命受光伏系统的间歇性与随机性影响。常见的蓄电池充电策略存在光伏电池发电利用率低,充电速率慢和寿命短的问题。针对以上问题,结合光伏电池最大功率点跟踪(maximum power point tracking,MPPT)和蓄电池阶段充电技术,提出基于MPPT的蓄电池脉冲充电策略。在Simulink中搭建仿真模型,仿真结果表明,采用蓄电池初始阶段MPPT充电和后期脉冲充电策略可有效利用光伏发电功率,加快蓄电池充电速度,同时延长蓄电池使用寿命。展开更多
基金support by the Young Elite Scientists Program of CSEE (No. JLB-2018-95)the National Natural Science Foundation of China (No. 51621065, No. U1766203)+1 种基金the support by FEDER funds through COMPETE 2020by Portuguese funds through FCT, under SAICT-PAC/0004/2015 (No. POCI-01-0145-FEDER-016434), 02/SAICT/2017 (No. POCI-01-0145-FEDER-029803) and UID/EEA/50014/2019 (No. POCI-01-0145-FEDER-006961)
文摘The rapidly increasing penetration of electric vehicles(EVs) in modern metropolises has been witnessed during the past decade, inspired by financial subsidies as well as public awareness of climate change and environment pro-tection. Integrating charging facilities, especially highpower chargers in fast charging stations, into power distribution systems remarkably alters the traditional load flow pattern, and thus imposes great challenges on the operation of distribution network in which controllable resources are rare. On the other hand, provided with appropriate incentives, the energy storage capability of electric vehicle offers a unique opportunity to facilitate the integration of distributed wind and solar power generation into power distribution system. The above trends call for thorough investigation and research on the interdependence between transportation system and power distribution system. This paper conducts a comprehensive survey on this line of research. The basic models of transportation system and power distribution system are introduced,especially the user equilibrium model, which describes the vehicular flow on each road segment and is not familiar to the readers in power system community. The modelling of interdependence across the two systems is highlighted.Taking into account such interdependence, applications ranging from long-term planning to short-term operation are reviewed with emphasis on comparing the description of traffic-power interdependence. Finally, an outlook of prospective directions and key technologies in future research is summarized.
文摘Batteries have been widely applied in many high-power applications,such as electric vehicles(EVs)and hybrid electric vehicles,where a suitable battery management system(BMS)is vital in ensuring safe and reliable operation of batteries.This paper aims to give a brief review on several key technologies of BMS,including battery modelling,state estimation and battery charging.First,popular battery types used in EVs are surveyed,followed by the introduction of key technologies used in BMS.Various battery models,including the electric model,thermal model and coupled electro-thermal model are reviewed.Then,battery state estimations for the state of charge,state of health and internal temperature are comprehensively surveyed.Finally,several key and traditional battery charging approaches with associated optimization methods are discussed.
文摘随着太阳能资源的广泛利用,光伏发电技术也日益受到重视。蓄电池作为光伏系统重要的组成部分,使用寿命受光伏系统的间歇性与随机性影响。常见的蓄电池充电策略存在光伏电池发电利用率低,充电速率慢和寿命短的问题。针对以上问题,结合光伏电池最大功率点跟踪(maximum power point tracking,MPPT)和蓄电池阶段充电技术,提出基于MPPT的蓄电池脉冲充电策略。在Simulink中搭建仿真模型,仿真结果表明,采用蓄电池初始阶段MPPT充电和后期脉冲充电策略可有效利用光伏发电功率,加快蓄电池充电速度,同时延长蓄电池使用寿命。
