Reradiation interference(RRI) from ultra high voltage(UHV) power lines has become a hotspot for researches in electromagnetic(EM) interference between UHV power grids and adjacent radio stations.The mechanism of RRI,n...Reradiation interference(RRI) from ultra high voltage(UHV) power lines has become a hotspot for researches in electromagnetic(EM) interference between UHV power grids and adjacent radio stations.The mechanism of RRI,numerical simulations,methods of protecting distance calculation,and resonance characteristics of RRI are reviewed in this paper using results of works reported by IEEE and Chinese publications.We conclude in this review that RRI at short and medium wavelengths can be simulated using method of moment(MoM) and two commonly used models,the wire model and the surface model,which have different applicable conditions.We indicate that the accurate simulation of RRI at higher frequencies using uniform geometrical theory of diffraction is still beyond our capability because it requires studies of the relative simulation methods.We also suggest that further researches of the mechanism of RRI and the prediction of resonance frequencies above 1.7 MHz are necessary for dealing with the interference between the existing power lines and radio stations because resonance frequencies proposed by IEEE are less than 1.7 MHz.展开更多
基于MD500直升机和国内1 000 k V三角形排布输电线路的实际参数,建立了直升机带电作业平台(HLLWP)模型。在不同的直升机带电作业平台的侵入角度和直升机带电作业平台与导线的距离下,通过有限元方法计算了直升机带电作业平台和操作人员...基于MD500直升机和国内1 000 k V三角形排布输电线路的实际参数,建立了直升机带电作业平台(HLLWP)模型。在不同的直升机带电作业平台的侵入角度和直升机带电作业平台与导线的距离下,通过有限元方法计算了直升机带电作业平台和操作人员身体表面的电场强度。考虑操作人员的人身安全,提出了直升机带电作业平台靠近不同相导线时的侵入路径。展开更多
基金Project supported by National Natural Science Foundation of China （51307098）, Hubei Provincial Natural Science Foundation of China （2012FFB03701）.
文摘Reradiation interference(RRI) from ultra high voltage(UHV) power lines has become a hotspot for researches in electromagnetic(EM) interference between UHV power grids and adjacent radio stations.The mechanism of RRI,numerical simulations,methods of protecting distance calculation,and resonance characteristics of RRI are reviewed in this paper using results of works reported by IEEE and Chinese publications.We conclude in this review that RRI at short and medium wavelengths can be simulated using method of moment(MoM) and two commonly used models,the wire model and the surface model,which have different applicable conditions.We indicate that the accurate simulation of RRI at higher frequencies using uniform geometrical theory of diffraction is still beyond our capability because it requires studies of the relative simulation methods.We also suggest that further researches of the mechanism of RRI and the prediction of resonance frequencies above 1.7 MHz are necessary for dealing with the interference between the existing power lines and radio stations because resonance frequencies proposed by IEEE are less than 1.7 MHz.
文摘基于MD500直升机和国内1 000 k V三角形排布输电线路的实际参数,建立了直升机带电作业平台(HLLWP)模型。在不同的直升机带电作业平台的侵入角度和直升机带电作业平台与导线的距离下,通过有限元方法计算了直升机带电作业平台和操作人员身体表面的电场强度。考虑操作人员的人身安全,提出了直升机带电作业平台靠近不同相导线时的侵入路径。
