Study On The Lightning Protection Of A Radio And Transmitting Station

Because the need of sending and receiving wireless radio and TV signalRadio television station often built on the highest elevation of the top position inlocal. Due to the particularity of its own structure (such as up to a dozen meterssignal towers, and there are various kinds of electronic equipment in the station),which makes it easy to become a lightning attacks. Especially in the southernmountainous area of radio and TV transmitting station, its reusability and inresponse to the lightning hazard vulnerability was more pronounced. This isbecause the south is a mountainous area, climate, more frequent thunderstormweather. In addition due to geographical constraints, makes a lot of cable TVnetwork can’t cover, so the wireless broadcast television about the local residentsoutside the exchanges and daily life. This article from the lightning formationmechanism, hazards, the invasion pathways and lightning protection measures andother aspects on the basis of the study, through to the broadcasting and televisiontransmitting station on site investigation and testing, analysis shows that the radioand TV transmitting station in lightning protection measureson the existingproblems and shortcomings, and address the problems discussed modification andperfection.Through the experimental investigation and analysis, combined withrelevant theories, discovered and pointed out the defect of the radio and TVtransmitting station in its power system and signal system grounding and lightningprotection measures on the deficiencies. Radio and television station in the powersystem, the lightning protection of the defects in the overhead lines are mainlyembodied in the insulation coordination is not reasonable, wrong to be installed onthe online have lightning rod, low voltage side of protection and ordinary cableshielding variable pressure level and grounding resistance of ray of existingproblems and the insufficiency. In signal system, problems are mainly embodied inthe feeder and lack of shielding signal line protection and grounding improper,radiation stand indoor equipment grounding and equipotential connection notperfect; And the Lord of the transmission station substation grounding grip toogrounding resistance. Radio and television station system in every link oflightning proof grounding existent problem, put forward a directionalreconstruction scheme, according to the actual situation of the implementation of the comprehensive reform measures. In the power supply system, mainly adoptingstrengthen10KV overhead lines into the line protection, through the overvoltagerelaying protection gap, improve the power supply system in insulationcoordination on the existing problems, and to realize the lightning overvoltageover current level of weakening and the attenuation. Optimization of the tower keypositions ground conditions, having the wrong line installation lightning rod. Usehigh levels of resistance to ray double special transformer winding lightningprotection; Strengthen the low voltage side of power cable shielding protection, toavoid induction lightning thus into power system and station low-pressureequipment. Station of low-pressure equipment optimization of various circuitrywithin the station layout, strengthen the protection shield; And perfect the voltageof the electronic equipment equipotential connection and grounding aspectsdeficiency. The Lord of the tower of station substation grounding grip ongrounding transformation, reduce its grounding resistance.