高山发射台电视发射机的雷电保护措施

Lightning protection measures of TV transmitter in Gaoshan transmitting station

高山发射台地理位置与气象条件相对特殊,而且电视发射机的供配电、信号调制、接收和发射系统构成及运行原理十分复杂,给防雷保护系统的设计和维护带来了极大困难。本文针对目前高山发射台电视发射机对雷电保护措施的特殊要求,分析了在其输配电线路和设备、发射塔与发射天线、建筑内外的接地系统以及信号传输网络中应采取的有效措施,并且结合实践经验探讨了防雷保护系统的设计要点,阐释了避雷装置选型安装、雷电流接地通路设计的原则和线路中的屏蔽、分流措施,基于多重防护以及科学的运维,保障高山发射台电视发射机的运行安全。

the geographical location and meteorological conditions of Alpine transmitting station are relatively special,and the power supply and distribution,signal modulation,receiving and transmitting system composition and operation principle of TV transmitter are very complex,which brings great difficulties to the design and maintenance of lightning protection system.In view of the special requirements for lightning protection measures of TV transmitters in Alpine transmitting station,this paper analyzes the effective measures to be taken in the transmission and distribution lines and equipment,transmission tower and transmitting antenna,grounding system inside and outside the building and signal transmission network,and discusses the design points of lightning protection system based on practical experience,explains the selection and installation of lightning protection devices,lightning protection Based on multiple protection and scientific operation and maintenance,the design principle of the current grounding path and the shielding and shunt measures in the line can ensure the operation safety of the TV transmitter in the alpine transmitting station.