A unified power flow controller(UPFC)combines the advantages of various flexible alternating current transmission system(FACTS)devices into a powerful format.Using a 500 kV power grid,this study evaluates the selectio...A unified power flow controller(UPFC)combines the advantages of various flexible alternating current transmission system(FACTS)devices into a powerful format.Using a 500 kV power grid,this study evaluates the selection and use of a UPFC to improve transmission capacity.The"UPFC unit capacity control proportionality coefficient"is introduced to quantify the control effect of the UPFC,and an optimal calculation method for the UPFC capacity is presented.Following the proposal of a UPFC site selection process,the data of an existing power grid is used to conduct simulations.The simulation results show that the UPFC has a strong ability to improve transmission capacity,and its use is greatly advantageous.Additionally,by applying the proposed selection method,the control effect and economic benefits of the UPFC can be comprehensively considered during project site selection.These findings have a guiding significance for UPFC site selection in ultra-high voltage power grids.展开更多
为了能够在线监测和诊断汽车故障、提高监测和诊断效率。将蓝牙（Bluetooth）、CAN（Controller Area Network）总线、Internet三者结合在一起,构建基于蓝牙技术的汽车远程诊断系统。详细描述了构建的技术方案、系统结构和TCU硬件实现...为了能够在线监测和诊断汽车故障、提高监测和诊断效率。将蓝牙（Bluetooth）、CAN（Controller Area Network）总线、Internet三者结合在一起,构建基于蓝牙技术的汽车远程诊断系统。详细描述了构建的技术方案、系统结构和TCU硬件实现电路。在这种架构中使用蓝牙联网协议,使用HTTP-CAN（Hypertext Transfer Protocol-Controller Area Network）网关提供底层的传输（物理）媒介,通过运行在TCU（Telematics Control Unit）上的嵌入式Web服务器,从启动蓝牙功能的便携式电脑的网络浏览器上,监视和控制汽车CAN总线上的各个节点状态,实现了对汽车的传感器及各个控制单元的自动测控。该系统突破原有的手工接插探头的传统监测和诊断方式,将监测时间由原来的近1 h缩短为现在的8～9 min,具有快捷,易操作,准确的数据的优越性。展开更多
基金supported by State Grid Corporation’s Science and Technology Project“Research and Demonstration of Technical Measures for Improving Voltage Supporting Capacity of Large-scale Urban Power Grid”(52094016000Y)
文摘A unified power flow controller(UPFC)combines the advantages of various flexible alternating current transmission system(FACTS)devices into a powerful format.Using a 500 kV power grid,this study evaluates the selection and use of a UPFC to improve transmission capacity.The"UPFC unit capacity control proportionality coefficient"is introduced to quantify the control effect of the UPFC,and an optimal calculation method for the UPFC capacity is presented.Following the proposal of a UPFC site selection process,the data of an existing power grid is used to conduct simulations.The simulation results show that the UPFC has a strong ability to improve transmission capacity,and its use is greatly advantageous.Additionally,by applying the proposed selection method,the control effect and economic benefits of the UPFC can be comprehensively considered during project site selection.These findings have a guiding significance for UPFC site selection in ultra-high voltage power grids.
文摘为了能够在线监测和诊断汽车故障、提高监测和诊断效率。将蓝牙（Bluetooth）、CAN（Controller Area Network）总线、Internet三者结合在一起,构建基于蓝牙技术的汽车远程诊断系统。详细描述了构建的技术方案、系统结构和TCU硬件实现电路。在这种架构中使用蓝牙联网协议,使用HTTP-CAN（Hypertext Transfer Protocol-Controller Area Network）网关提供底层的传输（物理）媒介,通过运行在TCU（Telematics Control Unit）上的嵌入式Web服务器,从启动蓝牙功能的便携式电脑的网络浏览器上,监视和控制汽车CAN总线上的各个节点状态,实现了对汽车的传感器及各个控制单元的自动测控。该系统突破原有的手工接插探头的传统监测和诊断方式,将监测时间由原来的近1 h缩短为现在的8～9 min,具有快捷,易操作,准确的数据的优越性。
