分析了3层式广域保护系统需要传输的消息种类以及各类消息对通信系统的要求,在此基础上选择了IP over ATM over SDH作为网络类型,以充分利用同步数字体系(SDH)光纤自愈环的低时延和可靠性以及异步传送模式(ATM)的服务质量(QoS)和IP的多...分析了3层式广域保护系统需要传输的消息种类以及各类消息对通信系统的要求,在此基础上选择了IP over ATM over SDH作为网络类型,以充分利用同步数字体系(SDH)光纤自愈环的低时延和可靠性以及异步传送模式(ATM)的服务质量(QoS)和IP的多业务支持;设计了多环网络拓扑并探讨了关键消息传输的通信协议;使用OPNET Modeler对关键信息传输进行了仿真,证实了此通信系统的有效性,仿真结果表明该通信系统可以满足最恶劣情况下的实时性和可靠性要求。展开更多
在研究虚拟局域网(Virtual Local Area Network,VLAN)对数字化变电站实时性与安全性的影响的基础上,进一步研究了VLAN的设置方法,根据通信网络的设备功能划分了11个不同VLAN,明确其所含设备和作用。同时,以D2-1型数字化变电站数据通信...在研究虚拟局域网(Virtual Local Area Network,VLAN)对数字化变电站实时性与安全性的影响的基础上,进一步研究了VLAN的设置方法,根据通信网络的设备功能划分了11个不同VLAN,明确其所含设备和作用。同时,以D2-1型数字化变电站数据通信星型网络为例,利用网络仿真软件OPNET Modeler对其进行建模仿真,研究VLAN对变电站的影响。仿真结果表明,变电站采用VLAN是可行的,并且划分VLAN不仅可以抑制广播信息泛滥,还可以减少交换机的负荷和减少网络延时,满足IEC61850对变电站内数据传输严格的时间要求,同时变电站安全性也得到提高。展开更多
利用动态建模技术对IEC 61850-5中D2-1型变电站层次化建模。应用准确的数学模型对变电站内智能电子设备间传输的综合数据流进行全面时域建模。在基于端口的虚拟局域网(Virtual Local Area Network,VLAN)划分基础上,运用优先级标签技术...利用动态建模技术对IEC 61850-5中D2-1型变电站层次化建模。应用准确的数学模型对变电站内智能电子设备间传输的综合数据流进行全面时域建模。在基于端口的虚拟局域网(Virtual Local Area Network,VLAN)划分基础上,运用优先级标签技术划分站内数据流传输优先级,分别对星型,环形拓扑结构变电站自动系统进行有无VLAN的跨间隔,跨层研究。OPNET仿真结果表明,采用星型,环形组网与VLAN技术,可以有效改善变电站通信网络实时性,较好地抑制广播信息泛滥问题。展开更多
HB-MAP (HB-mutual authentication protocol) is a mutual ultra-light-weight authentication protocol we have pro- posed before. In this paper, we present an HB-MAP simulation model. This model is based on the OPNET mod...HB-MAP (HB-mutual authentication protocol) is a mutual ultra-light-weight authentication protocol we have pro- posed before. In this paper, we present an HB-MAP simulation model. This model is based on the OPNET modeler and includes three parts, namely, the network model, the node model, and the process model. The simulation results are obtained mainly in the aspects of running time, queuing delay, throughput, and channel utilization. To show the performance of HB-MAP, simulation of two other protocols HB and LCAP (load-based concurrent access protocol) is also executed, and comparative analysis is carried out on the results. At the end of the paper, we show a simple process of the attacks and identify that the HB-MAP can defend against some attacks.展开更多
文摘分析了3层式广域保护系统需要传输的消息种类以及各类消息对通信系统的要求,在此基础上选择了IP over ATM over SDH作为网络类型,以充分利用同步数字体系(SDH)光纤自愈环的低时延和可靠性以及异步传送模式(ATM)的服务质量(QoS)和IP的多业务支持;设计了多环网络拓扑并探讨了关键消息传输的通信协议;使用OPNET Modeler对关键信息传输进行了仿真,证实了此通信系统的有效性,仿真结果表明该通信系统可以满足最恶劣情况下的实时性和可靠性要求。
文摘在研究虚拟局域网(Virtual Local Area Network,VLAN)对数字化变电站实时性与安全性的影响的基础上,进一步研究了VLAN的设置方法,根据通信网络的设备功能划分了11个不同VLAN,明确其所含设备和作用。同时,以D2-1型数字化变电站数据通信星型网络为例,利用网络仿真软件OPNET Modeler对其进行建模仿真,研究VLAN对变电站的影响。仿真结果表明,变电站采用VLAN是可行的,并且划分VLAN不仅可以抑制广播信息泛滥,还可以减少交换机的负荷和减少网络延时,满足IEC61850对变电站内数据传输严格的时间要求,同时变电站安全性也得到提高。
文摘利用动态建模技术对IEC 61850-5中D2-1型变电站层次化建模。应用准确的数学模型对变电站内智能电子设备间传输的综合数据流进行全面时域建模。在基于端口的虚拟局域网(Virtual Local Area Network,VLAN)划分基础上,运用优先级标签技术划分站内数据流传输优先级,分别对星型,环形拓扑结构变电站自动系统进行有无VLAN的跨间隔,跨层研究。OPNET仿真结果表明,采用星型,环形组网与VLAN技术,可以有效改善变电站通信网络实时性,较好地抑制广播信息泛滥问题。
基金Supported by the National Nature Science Foundation of China(60902061)the National Key Technology R&D Program (2008BAH28B06-05,2012BAH17F01)+1 种基金the National Culture S&T Promotion Program (WHB1002)the National High Iechnology Research and Development Drogram of China(863 Program) (2012AA011702)
文摘HB-MAP (HB-mutual authentication protocol) is a mutual ultra-light-weight authentication protocol we have pro- posed before. In this paper, we present an HB-MAP simulation model. This model is based on the OPNET modeler and includes three parts, namely, the network model, the node model, and the process model. The simulation results are obtained mainly in the aspects of running time, queuing delay, throughput, and channel utilization. To show the performance of HB-MAP, simulation of two other protocols HB and LCAP (load-based concurrent access protocol) is also executed, and comparative analysis is carried out on the results. At the end of the paper, we show a simple process of the attacks and identify that the HB-MAP can defend against some attacks.