中波广播发射系统的防雷措施  

Lightning Protection Measures for Broadcast Transmission System

作　　者：赵体辰 ZHAO Tichen(Jining Radio and Television Transmission Guarantee Center,Jining 272100,China)

机构地区：[1]济宁市广播电视传输保障中心,山东济宁272100

出　　处：《电视技术》2022年第11期96-98,102,共4页Video Engineering

摘　　要：广播发射系统设备的防雷措施,必须从广播信号源的接收系统、供电系统、发射机及天馈线系统等四个方面加以考虑实施。防雷原则是实施针对性的技术保护措施,将绝大部分雷电流泄散后,通过防雷设置阻塞过电压波,再通过雷电浪涌限制被保护设备上的浪涌过压幅值。对于天馈线系统中的天调匹配网络,其避雷系统主要采取安装石墨放电装置、串接隔直电容和并接泄放线圈等方式,以防止雷电由天线经传输馈管串至发射机端损坏发射机及附属设备。Lightning protection measures for broadcast transmission system equipment must be implemented from four aspects: reception system of broadcast signal source, power supply system, transmitter and antenna feeder system. The principle of lightning protection is to implement targeted technical protection measures. After most of the lightning currents are released, the blocking overvoltage wave is set through lightning protection, and then the surge overvoltage amplitude on the protected equipment is limited through lightning surge.For the sky modulation matching network in the antenna feeder system, its lightning protection system mainly adopts the setting methods of installing graphite discharge device, connecting the straight isolation capacitor in series, and connecting the discharge coil in parallel to prevent the damage of the transmitter and auxiliary equipment caused by lightning from the antenna to the transmitter end through the transmission feeder.

关 键 词：发射系统 信号源 发射机 天馈线系统 防雷措施 

分 类 号：TN934.2[电子电信—信号与信息处理]