摘要
直击雷严重影响着我国铁路通信系统的正常运行,为减少雷电对铁路通信的危害,文中提出以铁路通信数据传输稳定性为研究对象,研究直击雷影响下综合接地技术对铁路通信数据传输稳定性的影响程度,其中以直击雷影响下,运用综合接地技术后铁路通信数据传输中的过电压跳闸率表示数据传输的稳定程度。首先,根据铁路中综合接地系统的实际情况,构建暂态通信电路模型,并将通信电路模型实行分段,令通信电磁波波长远大于分段的导体长度和导线横向尺寸,且在分段导体为准静态场的条件下计算该电路模型;其次,以暂态电路模型为基础,依据特征线法对直击雷过电压的等值计算电路进行推导,分析不同条件下直击雷过电压的性质,在考虑过电压的影响下利用蒙特卡罗法对铁路通信雷击跳闸率进行有效计算后,为综合接地系统的避雷设计提供数据支持,分析综合接地技术对铁路通信数据传输的稳定性影响。实验表明,通过了解直击雷的性质可对接地系统避雷装置实现最优化配置,综合接地技术可以有效保证铁路通信数据传输的稳定性。
Lightning seriously affects the normal operation of the railway communication system of our country,in order to reduce the harm of lightning of the railway communication,the paper proposed the railway communication data transmission stability as the research object,study the impact of lightninggrounding technology under the comprehensive influence on the railway communication data transmission stability,the influence to lightning,using the that stable data transmission voltage tripping rate integrated grounding technology of railway communication in data transmission.Firstly,according to the actual situation of grounding system in railway construction,transient communication circuit model and communication circuit model implementation of sub conductor,make communication electromagnetic wave is much larger than the segment and the length of The wire lateral dimension,and the calculation of the circuit model for the static field under the condition of sub conductor;secondly,the transient circuit model based on the derivation of the equivalent calculation circuit characteristic method of lightning overvoltage,analysis of properties under different conditions of lightning overvoltage,considering the voltage under the influence of the Monte Carlo method for railway communication lightning trip rate for effective calculation,provide data support for the design of integrated lightning protection grounding system,analysis of the impact of the stability of the railway communication integrated data transmission grounding technology.Experimental results show that the lightning protection grounding system can achieve optimal allocation through the understanding of the nature of lightning,comprehensive ground The ground technology can effectively ensure the stability of railway communication data transmission.
作者
何一文
李珍
He Yiwen;Li Zhen(Institute of Mechanical and Automotive Engineering,Nanyang Institute of Technology,Nanyang 473006,China)
出处
《科技通报》
北大核心
2017年第10期109-112,116,共5页
Bulletin of Science and Technology
基金
河南省教育厅高等学校重点科研项目的研究成果(项目编号:14A120002)
关键词
铁路通信信号
电力系统
直击雷
综合接地系统
railway communication signal
power system
lightning
integrated grounding system
