In high voltage networks for the transport of electrical energy, lightning, a phenomenon as dangerous as it is impressive, with an easily recognizable form, can affect a power line by striking either a phase conductor...In high voltage networks for the transport of electrical energy, lightning, a phenomenon as dangerous as it is impressive, with an easily recognizable form, can affect a power line by striking either a phase conductor, a tower or a guard cable, thus causing more dangerous and constraining stresses on the lines for its proper operation. Thus, this article aims to analyze the behavior of a HV line during an atmospheric discharge and assess the spatial and temporal distribution of the lightning current wave. For this purpose, the generalities on the transmissible power in case of link without resistance and the modeling of the atmospheric surge propagation established on the basis of the theory of the lines with distributed constants implementing the wave equation known as the Alembert equation have been developed. Through this research, we are interested in the study of the space-time distribution of the lightning current wave in order to model the radiated electromagnetic field and to examine the influence of the atmospheric discharge induced overvoltage on the transportable power of a High Voltage AC Transmission line, for a good selective protection in order to illuminate the parasites. The 2D simulation based on engineering and “Transmission Line” models have been developed as well as the verification of the coherence of the different models, by comparing the fractal dimensions of the program results with those of the experimentally obtained figures.展开更多
电力线路工程勘测设计涉及大量的地理信息数据,包括地形地貌、建筑物、植被、矿区、保护区等信息和数据,通过地理信息系统(Geographic Information System,GIS)技术可以快速、准确地获取这些空间数据,为后续的设计工作提供基础资料,优...电力线路工程勘测设计涉及大量的地理信息数据,包括地形地貌、建筑物、植被、矿区、保护区等信息和数据,通过地理信息系统(Geographic Information System,GIS)技术可以快速、准确地获取这些空间数据,为后续的设计工作提供基础资料,优化线路路径。对此,阐述新型GIS技术的概念,重点分析我国电力线路工程勘测设计手段的现状,针对新型GIS技术对电力线路工程勘测产生的影响,进行基于新型GIS技术的电力线路工程勘测设计应用探讨。展开更多
文摘In high voltage networks for the transport of electrical energy, lightning, a phenomenon as dangerous as it is impressive, with an easily recognizable form, can affect a power line by striking either a phase conductor, a tower or a guard cable, thus causing more dangerous and constraining stresses on the lines for its proper operation. Thus, this article aims to analyze the behavior of a HV line during an atmospheric discharge and assess the spatial and temporal distribution of the lightning current wave. For this purpose, the generalities on the transmissible power in case of link without resistance and the modeling of the atmospheric surge propagation established on the basis of the theory of the lines with distributed constants implementing the wave equation known as the Alembert equation have been developed. Through this research, we are interested in the study of the space-time distribution of the lightning current wave in order to model the radiated electromagnetic field and to examine the influence of the atmospheric discharge induced overvoltage on the transportable power of a High Voltage AC Transmission line, for a good selective protection in order to illuminate the parasites. The 2D simulation based on engineering and “Transmission Line” models have been developed as well as the verification of the coherence of the different models, by comparing the fractal dimensions of the program results with those of the experimentally obtained figures.
文摘电力线路工程勘测设计涉及大量的地理信息数据,包括地形地貌、建筑物、植被、矿区、保护区等信息和数据,通过地理信息系统(Geographic Information System,GIS)技术可以快速、准确地获取这些空间数据,为后续的设计工作提供基础资料,优化线路路径。对此,阐述新型GIS技术的概念,重点分析我国电力线路工程勘测设计手段的现状,针对新型GIS技术对电力线路工程勘测产生的影响,进行基于新型GIS技术的电力线路工程勘测设计应用探讨。