一二次融合技术使得配电开关中二次智能传感单元近距离布置于一次高压电磁环境,配电开关因为电磁干扰产生大量故障。文中利用可控电弧放电原理,针对某型号10 k V一二次融合配电开关搭建了暂态电磁干扰模拟试验平台,获得了该户外一二次...一二次融合技术使得配电开关中二次智能传感单元近距离布置于一次高压电磁环境,配电开关因为电磁干扰产生大量故障。文中利用可控电弧放电原理,针对某型号10 k V一二次融合配电开关搭建了暂态电磁干扰模拟试验平台,获得了该户外一二次融合配电开关干扰信号,其中重点研究了智能传感器附近空间磁场规律;对配电终端(FTU)进行了屏蔽效能分析,计算了传感器合并单元电源线受扰情况。结果表明:一二次融合配电开关中智能传感器可能在持续强暂态电磁骚扰下发生严重故障,文中所研究的电磁暂态模拟试验系统可对智能传感器抗强电磁干扰能力进行考核,现有标准不能满足一二次融合结构下智能传感类设备抗强电磁干扰能力检测需求。展开更多
Cyber-physical-system（CPS） has been widely used in both civil and military applications.Wireless sensor network（WSN） as the part and parcel of CPS faces energy problem because sensors are battery powered,which res...Cyber-physical-system（CPS） has been widely used in both civil and military applications.Wireless sensor network（WSN） as the part and parcel of CPS faces energy problem because sensors are battery powered,which results in limited lifetime of the network.To address this energy problem,we take advantage of energy harvesting device（EHD） and study how to indefinitely prolong oil pipeline monitoring network lifetime by reasonable selecting EHD.Firstly,we propose a general strategy worst case-energy balance strategy（WC-EBS）,which defines worst case energy consumption（WCEC） as the maximum energy sensor node could expend for oil pipeline monitoring WSN.When the energy collected by EHD is equal or greater than WCEC,network can have an unlimited lifetime.However,energy harvesting rate is proportional to the price of EHD,WC-EBS will cause high network cost.To reduce network cost,we present two optimization strategies,optimization workloadenergy balance strategy（OW-EBS） and optimization first nodeenergy balance strategy（OF-EBS）.The main idea of OW-EBS is to cut down WCEC by reducing critical node transmission workload;OF-EBS confirms critical node by optimizing each sensor node transmission range,then we get the optimal energy harvesting rate in OF-EBS.The experimental results demonstrate that OF-EBS can indefinitely extend network lifetime with lower cost than WC-EBS and OW-EBS,and energy harvesting rate P in each strategy satisfies Pof-EBS≤P（OW-EBS）≤PWC-EBS.展开更多
文摘一二次融合技术使得配电开关中二次智能传感单元近距离布置于一次高压电磁环境,配电开关因为电磁干扰产生大量故障。文中利用可控电弧放电原理,针对某型号10 k V一二次融合配电开关搭建了暂态电磁干扰模拟试验平台,获得了该户外一二次融合配电开关干扰信号,其中重点研究了智能传感器附近空间磁场规律;对配电终端(FTU)进行了屏蔽效能分析,计算了传感器合并单元电源线受扰情况。结果表明:一二次融合配电开关中智能传感器可能在持续强暂态电磁骚扰下发生严重故障,文中所研究的电磁暂态模拟试验系统可对智能传感器抗强电磁干扰能力进行考核,现有标准不能满足一二次融合结构下智能传感类设备抗强电磁干扰能力检测需求。
基金partially supported by National Natural Science Foundation of China(61472072)National Basic Pre-research Program of China(2014CB360509)
文摘Cyber-physical-system（CPS） has been widely used in both civil and military applications.Wireless sensor network（WSN） as the part and parcel of CPS faces energy problem because sensors are battery powered,which results in limited lifetime of the network.To address this energy problem,we take advantage of energy harvesting device（EHD） and study how to indefinitely prolong oil pipeline monitoring network lifetime by reasonable selecting EHD.Firstly,we propose a general strategy worst case-energy balance strategy（WC-EBS）,which defines worst case energy consumption（WCEC） as the maximum energy sensor node could expend for oil pipeline monitoring WSN.When the energy collected by EHD is equal or greater than WCEC,network can have an unlimited lifetime.However,energy harvesting rate is proportional to the price of EHD,WC-EBS will cause high network cost.To reduce network cost,we present two optimization strategies,optimization workloadenergy balance strategy（OW-EBS） and optimization first nodeenergy balance strategy（OF-EBS）.The main idea of OW-EBS is to cut down WCEC by reducing critical node transmission workload;OF-EBS confirms critical node by optimizing each sensor node transmission range,then we get the optimal energy harvesting rate in OF-EBS.The experimental results demonstrate that OF-EBS can indefinitely extend network lifetime with lower cost than WC-EBS and OW-EBS,and energy harvesting rate P in each strategy satisfies Pof-EBS≤P（OW-EBS）≤PWC-EBS.
