Electricity is crucial for critical sectors such as banking, healthcare, education, and business. However, in developing nations like Cameroon, persistent power fluctuations and outages present significant challenges,...Electricity is crucial for critical sectors such as banking, healthcare, education, and business. However, in developing nations like Cameroon, persistent power fluctuations and outages present significant challenges, leading to communication disruptions, food spoilage, water supply interruptions, and financial losses. This study proposes a novel solution: a three-input automatic transfer switch integrated with Internet of Things (IoT) and data logging capabilities. The system automatically switches between three independent power sources based on priority and availability, employing electromechanical contactors, relays, and timers for seamless switching. It incorporates ATMEGA328P microcontrollers, a GSM module for communication, and an SD card module for efficient data logging. Safety measures, such as miniature circuit breakers, voltage monitoring relays, and proper grounding, ensure user protection and system integrity. A user-friendly mobile application enables remote manual switching and real-time system information requests, while SMS notifications inform consumers about power source changes. The system has a power rating of 4.752 kW, accommodating a maximum continuous load of the same value. Voltage dividers provide a reliable 3.37 VDC output from a 12 VDC input, and data logging operates effectively by storing system data onto an SD card every 1.5 seconds. Comprehensive testing validates the system’s performance, with an average percentage error of 2.31% compared to actual values, falling within an acceptable range. This solution distinguishes itself by incorporating modern technologies like data logging and IoT, addressing the limitations of existing alternatives.展开更多
多电源系统在相互切换时因中性线接地方式的不同,将会对不间断电源(uninterruptible power supply,UPS)系统性能产生较大影响。首先,在三极和四极自动转换开关基础上,通过不同接地方式搭建了多电源系统电路等效模型,探讨了不同电路结构...多电源系统在相互切换时因中性线接地方式的不同,将会对不间断电源(uninterruptible power supply,UPS)系统性能产生较大影响。首先,在三极和四极自动转换开关基础上,通过不同接地方式搭建了多电源系统电路等效模型,探讨了不同电路结构的优缺点,并通过搭建MATLAB/Simulink仿真模型,对多电源系统电路性能指标进行了仿真验证;在多电源系统电路基础上,搭建了多电源系统UPS电路MATLAB/Simulink仿真模型,对多电源系统UPS电路关键性能指标进行了仿真实验。其次,以多电源系统UPS电路不产生杂散电流,中性线不分流,中性线接地基准连续,多路输入电源之间、输入电源与输出电源之间、输入电源与旁路电源之间电气隔离等性能指标为优化目标,提出了3种多电源系统UPS电路结构优化方案。最后,搭建3种优化改进电路MATLAB/Simulink仿真模型,对3种UPS电路性能指标进行仿真实验,实验表明改进方案三“多电源系统UPS电源电路加装旁路隔离变压器”具有多电源系统UPS电源电路最优性能指标。展开更多
空管系统为全国民用航空提供空中交通服务、通信导航监视、航空气象、航行情报服务,是民航运行的枢纽。供电设备故障会严重影响空中交通安全。为确保设备的供电安全,从航管小区供配电系统设计出发,提出基于双市电双油机供电、不间断电源...空管系统为全国民用航空提供空中交通服务、通信导航监视、航空气象、航行情报服务,是民航运行的枢纽。供电设备故障会严重影响空中交通安全。为确保设备的供电安全,从航管小区供配电系统设计出发,提出基于双市电双油机供电、不间断电源(Uninterruptible Power Supply,UPS)并机双路供电、分布式静态转换开关(Static Transfer Switch,STS)供电以及直流应急供电的多重冗余供电体系。在空管设备末端供电设计方面,针对设备结构和管制席位设备及功能,提出优化的冗余供电设计方案。展开更多
文摘Electricity is crucial for critical sectors such as banking, healthcare, education, and business. However, in developing nations like Cameroon, persistent power fluctuations and outages present significant challenges, leading to communication disruptions, food spoilage, water supply interruptions, and financial losses. This study proposes a novel solution: a three-input automatic transfer switch integrated with Internet of Things (IoT) and data logging capabilities. The system automatically switches between three independent power sources based on priority and availability, employing electromechanical contactors, relays, and timers for seamless switching. It incorporates ATMEGA328P microcontrollers, a GSM module for communication, and an SD card module for efficient data logging. Safety measures, such as miniature circuit breakers, voltage monitoring relays, and proper grounding, ensure user protection and system integrity. A user-friendly mobile application enables remote manual switching and real-time system information requests, while SMS notifications inform consumers about power source changes. The system has a power rating of 4.752 kW, accommodating a maximum continuous load of the same value. Voltage dividers provide a reliable 3.37 VDC output from a 12 VDC input, and data logging operates effectively by storing system data onto an SD card every 1.5 seconds. Comprehensive testing validates the system’s performance, with an average percentage error of 2.31% compared to actual values, falling within an acceptable range. This solution distinguishes itself by incorporating modern technologies like data logging and IoT, addressing the limitations of existing alternatives.
文摘多电源系统在相互切换时因中性线接地方式的不同,将会对不间断电源(uninterruptible power supply,UPS)系统性能产生较大影响。首先,在三极和四极自动转换开关基础上,通过不同接地方式搭建了多电源系统电路等效模型,探讨了不同电路结构的优缺点,并通过搭建MATLAB/Simulink仿真模型,对多电源系统电路性能指标进行了仿真验证;在多电源系统电路基础上,搭建了多电源系统UPS电路MATLAB/Simulink仿真模型,对多电源系统UPS电路关键性能指标进行了仿真实验。其次,以多电源系统UPS电路不产生杂散电流,中性线不分流,中性线接地基准连续,多路输入电源之间、输入电源与输出电源之间、输入电源与旁路电源之间电气隔离等性能指标为优化目标,提出了3种多电源系统UPS电路结构优化方案。最后,搭建3种优化改进电路MATLAB/Simulink仿真模型,对3种UPS电路性能指标进行仿真实验,实验表明改进方案三“多电源系统UPS电源电路加装旁路隔离变压器”具有多电源系统UPS电源电路最优性能指标。
文摘空管系统为全国民用航空提供空中交通服务、通信导航监视、航空气象、航行情报服务,是民航运行的枢纽。供电设备故障会严重影响空中交通安全。为确保设备的供电安全,从航管小区供配电系统设计出发,提出基于双市电双油机供电、不间断电源(Uninterruptible Power Supply,UPS)并机双路供电、分布式静态转换开关(Static Transfer Switch,STS)供电以及直流应急供电的多重冗余供电体系。在空管设备末端供电设计方面,针对设备结构和管制席位设备及功能,提出优化的冗余供电设计方案。
