针对各种直流输电工程控制保护系统的通用水平较差的问题,开发了一种新型的适用于多种直流输电工程的换流站通用集成控制保护平台,可用于常规高压直流输电(highvoltage direction current,HVDC)、电压源换流器型直流输电(voltage source...针对各种直流输电工程控制保护系统的通用水平较差的问题,开发了一种新型的适用于多种直流输电工程的换流站通用集成控制保护平台,可用于常规高压直流输电(highvoltage direction current,HVDC)、电压源换流器型直流输电(voltage source converter based HVDC,VSC-HVDC)以及混合直流输电等复杂输电形式的场合。提出了通用集成平台的整体功能需求和平台的设计原则,并从功能和设备2个角度出发,提出了该平台的2种体系结构方案,阐述了平台每部分的控制保护设备、控制保护系统的功能和范围以及各部分之间的隶属和通信关系。该体系框架可将不同种直流输电的控制保护功能有效集成,为通用控制保护平台的开发奠定了基础。展开更多
This paper presents a universal platform "uSensing" to support smartphones to communicate with sensor nodes in Wireless Sensor Networks (WSNs).Since phones have different CPU processers and operating systems...This paper presents a universal platform "uSensing" to support smartphones to communicate with sensor nodes in Wireless Sensor Networks (WSNs).Since phones have different CPU processers and operating systems,it is a challenge to merge these heterogeneities and develop such a universal platform.In this paper,we design both hardware and software to support the "universal" feature of uSensing:1) "uSD" card:an IEEE 802.15.4 physical communication card with SD interface;2) "uSinkWare":a WSNs middleware running on smartphones.Integrated with uSD card and uSinkWare,phones become mobile data sinks to access into WSNs and parse messages from sensor nodes.We demonstrate the proposed uSensing platform in a commercial smartphone to connect with our WSNs testbed,and validate that the smartphone has the same WSNs functions as commercial fixed sink.Additionally,we evaluate the performance of uSensing platform through measuring phone's CPU load and power consumption,and analyze the performance of these metrics theoretically.The results suggest that the phone-based mobile sink has enough capability to serve as a mobile sink of WSNs and can work up to twenty hours due to low power consumption.展开更多
文摘针对各种直流输电工程控制保护系统的通用水平较差的问题,开发了一种新型的适用于多种直流输电工程的换流站通用集成控制保护平台,可用于常规高压直流输电(highvoltage direction current,HVDC)、电压源换流器型直流输电(voltage source converter based HVDC,VSC-HVDC)以及混合直流输电等复杂输电形式的场合。提出了通用集成平台的整体功能需求和平台的设计原则,并从功能和设备2个角度出发,提出了该平台的2种体系结构方案,阐述了平台每部分的控制保护设备、控制保护系统的功能和范围以及各部分之间的隶属和通信关系。该体系框架可将不同种直流输电的控制保护功能有效集成,为通用控制保护平台的开发奠定了基础。
基金supported by the National Natural Science Foundation of China under Grant No.60932005China and Europe Government Cooperation Projects of the Ministry of Science and Technology under Grant No.2010DFA11680the Tsinghua Sci-Tech Project under Grant No.2011THZ0
文摘This paper presents a universal platform "uSensing" to support smartphones to communicate with sensor nodes in Wireless Sensor Networks (WSNs).Since phones have different CPU processers and operating systems,it is a challenge to merge these heterogeneities and develop such a universal platform.In this paper,we design both hardware and software to support the "universal" feature of uSensing:1) "uSD" card:an IEEE 802.15.4 physical communication card with SD interface;2) "uSinkWare":a WSNs middleware running on smartphones.Integrated with uSD card and uSinkWare,phones become mobile data sinks to access into WSNs and parse messages from sensor nodes.We demonstrate the proposed uSensing platform in a commercial smartphone to connect with our WSNs testbed,and validate that the smartphone has the same WSNs functions as commercial fixed sink.Additionally,we evaluate the performance of uSensing platform through measuring phone's CPU load and power consumption,and analyze the performance of these metrics theoretically.The results suggest that the phone-based mobile sink has enough capability to serve as a mobile sink of WSNs and can work up to twenty hours due to low power consumption.
