中波广播发射台天馈系统接地改造与防雷技术研究

Research on Grounding Transformation and Lightning Protection Technology of Medium Wave Broadcasting Transmission Station̓s Antenna Feed System

接地与防雷是保证中波广播发射台天馈系统信号质量的重要保护手段,但随着天馈系统结构逐渐复杂化,规模逐渐扩大化,接地与防雷组织已经无法满足需求,其在实际应用中不仅发射场强较弱,且接地电阻仍然比较高,无法达到预期的接地防雷效果,为此文中提出了中波广播发射台天馈系统接地改造与防雷技术研究。通过增设机房接地和电源接地,并改变接地网接地方式,实现对中波广播发射台天馈系统的接地改造,采用逐级防雷技术,对雷电分级泄流,完成中波广播发射台天馈系统接地改造与防雷。经实验证明,在设计技术的应用下,提高了天馈系统发射场强,降低了接地电阻,为中波广播发射台天馈系统接地改造与防雷提供了参考依据。

Grounding and lightning protection are important protective measures to ensure the signal quality of the antenna feeder system of medium wave broadcasting transmission stations.However,with the gradual complexity and expansion of the antenna feeder system structure,the grounding and lightning protection organization can no longer meet the needs.In practical applications,not only is the transmission field strength weak,but the grounding resistance is still relatively high,which cannot achieve the expected grounding and lightning protection effect.Therefore,this paper proposes the grounding transformation and lightning protection technology research of the antenna feeder system of medium wave broadcasting transmission stations.By adding grounding in the computer room and power supply,and changing the grounding method of the grounding network,the grounding transformation of the medium wave broadcasting transmitter antenna system is achieved.The stepwise lightning protection technology is adopted to classify and discharge lightning,and the grounding transformation and lightning protection of the medium wave broadcasting transmitter antenna system are completed.Through experimental verification,it has been proven that under the application of design technology,the transmission field strength of the antenna feed system has been improved,and the grounding resistance has been reduced,providing a reference basis for the grounding transformation and lightning protection of the antenna feed system of medium wave broadcasting transmission stations.