针对GIS设备SF_6泄漏故障,介绍了基于红外成像和定量检测的联合检漏方法的技术优势。结合某220 k V变电站GIS设备漏气故障,首先应用联合检漏方法进行泄漏点定位,之后开仓检修,查找漏气部位、分析漏气原因,给出GIS设备漏气消缺具体过程,...针对GIS设备SF_6泄漏故障,介绍了基于红外成像和定量检测的联合检漏方法的技术优势。结合某220 k V变电站GIS设备漏气故障,首先应用联合检漏方法进行泄漏点定位,之后开仓检修,查找漏气部位、分析漏气原因,给出GIS设备漏气消缺具体过程,最后总结了防止GIS设备漏气的具体措施,对电网的安全运行、GIS设备制造和环境保护具有现实意义。展开更多
The newly emerging orthogonal time frequency space(OTFS)modulation can ob⁃tain delay-Doppler diversity gain to significantly improve the system performance in high mobility wireless communication scenarios such as veh...The newly emerging orthogonal time frequency space(OTFS)modulation can ob⁃tain delay-Doppler diversity gain to significantly improve the system performance in high mobility wireless communication scenarios such as vehicle-to-everything(V2X),high-speed railway and unmanned aerial vehicles(UAV),by employing inverse symplectic finite Fouri⁃er transform(ISFFT)and symplectic finite Fourier transform(SFFT).However,OTFS modu⁃lation will dramatically increase system complexity,especially at the receiver side.Thus,de⁃signing low complexity OTFS receiver is a key issue for OTFS modulation to be adopted by new-generation wireless communication systems.In this paper,we review low complexity OTFS detectors and provide some insights on future researches.We firstly present the OTFS system model and basic principles,followed by an overview of OTFS detector structures,classifications and comparative discussion.We also survey the principles of OTFS detection algorithms.Furthermore,we discuss the design of hybrid OTFS and orthogonal frequency di⁃vision multiplexing(OFDM)detectors in single user and multi-user multi-waveform commu⁃nication systems.Finally,we address the main challenges in designing low complexity OT⁃FS detectors and identify some future research directions.展开更多
文摘针对GIS设备SF_6泄漏故障,介绍了基于红外成像和定量检测的联合检漏方法的技术优势。结合某220 k V变电站GIS设备漏气故障,首先应用联合检漏方法进行泄漏点定位,之后开仓检修,查找漏气部位、分析漏气原因,给出GIS设备漏气消缺具体过程,最后总结了防止GIS设备漏气的具体措施,对电网的安全运行、GIS设备制造和环境保护具有现实意义。
基金supported in part by the NSFC Project under Grant No.61871334part by the open research fund of the State Key Laboratory of Integrated Services Networks,Xidian University under Grant No.ISN21-15+1 种基金in part by the Fundamental Research Funds for the Central Universities,SWJTU under Grant No.2682020CX79supported by the NSFC project under Grant No.61731017 and the“111”project under Grant No.111-2-14.
文摘The newly emerging orthogonal time frequency space(OTFS)modulation can ob⁃tain delay-Doppler diversity gain to significantly improve the system performance in high mobility wireless communication scenarios such as vehicle-to-everything(V2X),high-speed railway and unmanned aerial vehicles(UAV),by employing inverse symplectic finite Fouri⁃er transform(ISFFT)and symplectic finite Fourier transform(SFFT).However,OTFS modu⁃lation will dramatically increase system complexity,especially at the receiver side.Thus,de⁃signing low complexity OTFS receiver is a key issue for OTFS modulation to be adopted by new-generation wireless communication systems.In this paper,we review low complexity OTFS detectors and provide some insights on future researches.We firstly present the OTFS system model and basic principles,followed by an overview of OTFS detector structures,classifications and comparative discussion.We also survey the principles of OTFS detection algorithms.Furthermore,we discuss the design of hybrid OTFS and orthogonal frequency di⁃vision multiplexing(OFDM)detectors in single user and multi-user multi-waveform commu⁃nication systems.Finally,we address the main challenges in designing low complexity OT⁃FS detectors and identify some future research directions.
