In this study,the present situation and characteristics of power supply in remote areas are summarized.By studying the cases of power supply projects in remote areas,the experience is analyzed and described,and the ap...In this study,the present situation and characteristics of power supply in remote areas are summarized.By studying the cases of power supply projects in remote areas,the experience is analyzed and described,and the applicability of related technologies,such as grid-forming storage and power load management,is studied,including grid-connection technologies,such as grid-forming converters and power load management.On this basis,three power-supply modes were proposed.The application scenarios and advantages of the three modes were compared and analyzed.Based on the local development situation,the temporal sequences of the three schemes are described,and a case study was conducted.The study of the heavy-load power supply mode in remote areas contributes to solving the problem of heavy-load green power consumption in remote areas and promoting the further development of renewable energy.展开更多
A power management unit （PMU） chip supplying dual panel supply voltage, which has a low electro-magnetic interference （EMI） characteristic and is favorable for miniaturization, is designed. A two-phase charge pump...A power management unit （PMU） chip supplying dual panel supply voltage, which has a low electro-magnetic interference （EMI） characteristic and is favorable for miniaturization, is designed. A two-phase charge pump circuit using external pumping capacitor increases its pumping current and works out the charge-loss problem by using bulk-potential biasing circuit. A low-power start-up circuit is also proposed to reduce the power consumption of the band-gap reference voltage generator. And the ring oscillator used in the ELVSS power circuit is designed with logic devices by supplying the logic power supply to reduce the layout area. The PMU chip is designed with MagnaChip＇s 0.25 μ high-voltage process. The driving currents of ELVDD and ELVSS are more than 50 mA when a SPICE simulation is done.展开更多
This paper presents a real-time battery management unit designed by applying the Coulomb counting method and intended for use in an integrated renewable energy system for PV-Hybrid power supply. Battery management is ...This paper presents a real-time battery management unit designed by applying the Coulomb counting method and intended for use in an integrated renewable energy system for PV-Hybrid power supply. Battery management is required to stabilize hybrid systems and extend battery lifetimes. The battery management unit is divided into three main stages. Firstly, analysis of the basic components of the battery type used in the system is considered. Secondly, the state of charge (SOC) estimation method and the deterioration factor of the battery are analyzed. Finally, the overall battery management system, including a computer-based measurement and control unit, is constructed. The control system displays real-time information through LabVIEW 8.5 by estimating the state of charge through various measurements. The system will issue alerts when malfunctions are detected, and the operator can analyze and react to the system in real time to stabilize the system and extend the battery lifetime.展开更多
The current research of vehicle electrical power supply system mainly focuses on electric vehicles（EV） and hybrid electric vehicles（HEV）.The vehicle electrical power supply system used in traditional fuel vehicles...The current research of vehicle electrical power supply system mainly focuses on electric vehicles（EV） and hybrid electric vehicles（HEV）.The vehicle electrical power supply system used in traditional fuel vehicles is rather simple and imperfect;electrical/electronic devices（EEDs） applied in vehicles are usually directly connected with the vehicle＇s battery.With increasing numbers of EEDs being applied in traditional fuel vehicles,vehicle electrical power supply systems should be optimized and improved so that they can work more safely and more effectively.In this paper,a new vehicle electrical power supply system for traditional fuel vehicles,which accounts for all electrical/electronic devices and complex work conditions,is proposed based on a smart electrical/electronic device（SEED） system.Working as an independent intelligent electrical power supply network,the proposed system is isolated from the electrical control module and communication network,and access to the vehicle system is made through a bus interface.This results in a clean controller power supply with no electromagnetic interference.A new practical battery state of charge（So C） estimation method is also proposed to achieve more accurate So C estimation for lead-acid batteries in traditional fuel vehicles so that the intelligent power system can monitor the status of the battery for an over-current state in each power channel.Optimized protection methods are also used to ensure power supply safety.Experiments and tests on a traditional fuel vehicle are performed,and the results reveal that the battery So C is calculated quickly and sufficiently accurately for battery over-discharge protection.Over-current protection is achieved,and the entire vehicle＇s power utilization is optimized.For traditional fuel vehicles,the proposed vehicle electrical power supply system is comprehensive and has a unified system architecture,enhancing system reliability and security.展开更多
As a matured technique used in many fields,the distributed computer system is still a new management method for the aeronautical electrical power distribution system in our country. In this paper, a novel aircraft ele...As a matured technique used in many fields,the distributed computer system is still a new management method for the aeronautical electrical power distribution system in our country. In this paper, a novel aircraft electrical power distribution system based on the distributed computer system is proposed. The principles, features and structure of the aircraft electrical power distribution system and the distributed computer system named electrical load management system (ELMS) are studied. The ELMS composed of four electrical load management centers (ELMCs) and two power source processors (PSPs) operates in the 1553B buses. Principles of the ELMCs and the PSPs are introduced. With the application of the distributed computer system, the aircraft electrical power distribution system is simple, adaptable and flexible.展开更多
随着汽车技术的不断发展,汽车的电气设备种类越来越多,电器消耗的电能占整车能量比重不断上升,对汽车低压电源管理提出更高要求。为满足用户日益增长的汽车电子设备用电需求,达到减少整车能量消耗、提高电池充电效率的目的,在对纯电动...随着汽车技术的不断发展,汽车的电气设备种类越来越多,电器消耗的电能占整车能量比重不断上升,对汽车低压电源管理提出更高要求。为满足用户日益增长的汽车电子设备用电需求,达到减少整车能量消耗、提高电池充电效率的目的,在对纯电动汽车负载进行分类的基础上,利用遗传算法对用于电量安全分级的低压电池荷电状态(state of charge,SOC)进行优化,并提出一种基于SOC的4级恒流低压锂电池充电管理策略;利用AVL-Cruise和MATLAB-Simulink软件联合仿真搭建车辆模型,采用不同工况进行仿真验证和对比分析。结果表明,低压锂电池电源管理策略能够满足纯电动汽车的电量安全性要求,在一定程度上提高了整车经济性;优化后的锂电池充电效率有一定的提高,充电时间也有所减少。展开更多
针对地铁无人值守车站信号设备房小型不间断电源(Uninterruptible Power Supply,UPS)因缺乏在线监测而导致故障影响大的问题,开展了基于5G和简单网络管理协议(Simple Network Management Protocol,SNMP)的小型UPS在线监测方法研究,对监...针对地铁无人值守车站信号设备房小型不间断电源(Uninterruptible Power Supply,UPS)因缺乏在线监测而导致故障影响大的问题,开展了基于5G和简单网络管理协议(Simple Network Management Protocol,SNMP)的小型UPS在线监测方法研究,对监测系统的原理及组成进行了详细的阐述,分析了SNMP协议的管理信息库(Management Information Base,MIB),并给出了MIB库的应用方法,运用5G技术进行数据传输,最后通过编制应用软件,实现了型号为UHA1R-0030L的艾默生小型UPS的远程实时数据采集,为地铁无人值守车站小型UPS远程监测提供了解决方案,对解决长期以来地铁无人值守车站小型UPS发生故障无法及时处理的问题具有十分重要的意义。展开更多
文摘In this study,the present situation and characteristics of power supply in remote areas are summarized.By studying the cases of power supply projects in remote areas,the experience is analyzed and described,and the applicability of related technologies,such as grid-forming storage and power load management,is studied,including grid-connection technologies,such as grid-forming converters and power load management.On this basis,three power-supply modes were proposed.The application scenarios and advantages of the three modes were compared and analyzed.Based on the local development situation,the temporal sequences of the three schemes are described,and a case study was conducted.The study of the heavy-load power supply mode in remote areas contributes to solving the problem of heavy-load green power consumption in remote areas and promoting the further development of renewable energy.
文摘A power management unit （PMU） chip supplying dual panel supply voltage, which has a low electro-magnetic interference （EMI） characteristic and is favorable for miniaturization, is designed. A two-phase charge pump circuit using external pumping capacitor increases its pumping current and works out the charge-loss problem by using bulk-potential biasing circuit. A low-power start-up circuit is also proposed to reduce the power consumption of the band-gap reference voltage generator. And the ring oscillator used in the ELVSS power circuit is designed with logic devices by supplying the logic power supply to reduce the layout area. The PMU chip is designed with MagnaChip＇s 0.25 μ high-voltage process. The driving currents of ELVDD and ELVSS are more than 50 mA when a SPICE simulation is done.
文摘This paper presents a real-time battery management unit designed by applying the Coulomb counting method and intended for use in an integrated renewable energy system for PV-Hybrid power supply. Battery management is required to stabilize hybrid systems and extend battery lifetimes. The battery management unit is divided into three main stages. Firstly, analysis of the basic components of the battery type used in the system is considered. Secondly, the state of charge (SOC) estimation method and the deterioration factor of the battery are analyzed. Finally, the overall battery management system, including a computer-based measurement and control unit, is constructed. The control system displays real-time information through LabVIEW 8.5 by estimating the state of charge through various measurements. The system will issue alerts when malfunctions are detected, and the operator can analyze and react to the system in real time to stabilize the system and extend the battery lifetime.
基金Supported by Collaborative Innovation Center of Intelligent New Energy Vehicle of U.S.and China-Clean Energy Research Center,Fund of China Scholarship Council(Grant No.201406215015)
文摘The current research of vehicle electrical power supply system mainly focuses on electric vehicles（EV） and hybrid electric vehicles（HEV）.The vehicle electrical power supply system used in traditional fuel vehicles is rather simple and imperfect;electrical/electronic devices（EEDs） applied in vehicles are usually directly connected with the vehicle＇s battery.With increasing numbers of EEDs being applied in traditional fuel vehicles,vehicle electrical power supply systems should be optimized and improved so that they can work more safely and more effectively.In this paper,a new vehicle electrical power supply system for traditional fuel vehicles,which accounts for all electrical/electronic devices and complex work conditions,is proposed based on a smart electrical/electronic device（SEED） system.Working as an independent intelligent electrical power supply network,the proposed system is isolated from the electrical control module and communication network,and access to the vehicle system is made through a bus interface.This results in a clean controller power supply with no electromagnetic interference.A new practical battery state of charge（So C） estimation method is also proposed to achieve more accurate So C estimation for lead-acid batteries in traditional fuel vehicles so that the intelligent power system can monitor the status of the battery for an over-current state in each power channel.Optimized protection methods are also used to ensure power supply safety.Experiments and tests on a traditional fuel vehicle are performed,and the results reveal that the battery So C is calculated quickly and sufficiently accurately for battery over-discharge protection.Over-current protection is achieved,and the entire vehicle＇s power utilization is optimized.For traditional fuel vehicles,the proposed vehicle electrical power supply system is comprehensive and has a unified system architecture,enhancing system reliability and security.
文摘As a matured technique used in many fields,the distributed computer system is still a new management method for the aeronautical electrical power distribution system in our country. In this paper, a novel aircraft electrical power distribution system based on the distributed computer system is proposed. The principles, features and structure of the aircraft electrical power distribution system and the distributed computer system named electrical load management system (ELMS) are studied. The ELMS composed of four electrical load management centers (ELMCs) and two power source processors (PSPs) operates in the 1553B buses. Principles of the ELMCs and the PSPs are introduced. With the application of the distributed computer system, the aircraft electrical power distribution system is simple, adaptable and flexible.
文摘随着汽车技术的不断发展,汽车的电气设备种类越来越多,电器消耗的电能占整车能量比重不断上升,对汽车低压电源管理提出更高要求。为满足用户日益增长的汽车电子设备用电需求,达到减少整车能量消耗、提高电池充电效率的目的,在对纯电动汽车负载进行分类的基础上,利用遗传算法对用于电量安全分级的低压电池荷电状态(state of charge,SOC)进行优化,并提出一种基于SOC的4级恒流低压锂电池充电管理策略;利用AVL-Cruise和MATLAB-Simulink软件联合仿真搭建车辆模型,采用不同工况进行仿真验证和对比分析。结果表明,低压锂电池电源管理策略能够满足纯电动汽车的电量安全性要求,在一定程度上提高了整车经济性;优化后的锂电池充电效率有一定的提高,充电时间也有所减少。
文摘针对地铁无人值守车站信号设备房小型不间断电源(Uninterruptible Power Supply,UPS)因缺乏在线监测而导致故障影响大的问题,开展了基于5G和简单网络管理协议(Simple Network Management Protocol,SNMP)的小型UPS在线监测方法研究,对监测系统的原理及组成进行了详细的阐述,分析了SNMP协议的管理信息库(Management Information Base,MIB),并给出了MIB库的应用方法,运用5G技术进行数据传输,最后通过编制应用软件,实现了型号为UHA1R-0030L的艾默生小型UPS的远程实时数据采集,为地铁无人值守车站小型UPS远程监测提供了解决方案,对解决长期以来地铁无人值守车站小型UPS发生故障无法及时处理的问题具有十分重要的意义。
