电力线载波通道管理系统设计与实现

发布时间：2018-08-23 12:08

【摘要】：随着电力通信的发展,光纤通信几乎取代了传统的电力线载波,但在一些场合电力线通信仍具有一定价值,特别是在中压配电网中,电力线通信仍是有效手段。对于仍在采用电力线载波通信的区域,当新增载波通道时,需要对新增通道进行通信频率的分配设计。但闲置的电力线载波通道上的空置阻波器对线路的安全运行又会造成影响,所以核算通道衰减特性并判断是否可拆除空置的阻波器也是十分必要和迫切的。因此,新形势下需研究电力线载波通道特性以提高电力线载波通信的管理水平。本文针对架空电力线载波通道管理系统需求,设计了系统管理功能结构;对架空电力线载波通信的频率分配及阻波器拆除进行算法设计,分析了频率分配及空置阻波器拆除方法的理论依据,通过对比几种典型的电力线载波通信技术频率分配方法,并结合现场需求,设计了频率分配与空置阻波器拆除方法及相应流程;本文采用Visual Basic实现系统软件设计。测试结果表明,管理系统中的频率分配与空置阻波器拆除方法可以快速准确的实现频率的分配及空置阻波器的拆除判断,且可实现图形及设备的实时管理,系统软件功能满足应用要求。本文最后还对10kV中压地埋电缆的信道模型和传输特性进行分析研究,采用OFDM技术,经仿真分析,给出了宽带通信频率分配方法。
[Abstract]:With the development of power communication, optical fiber communication has almost replaced the traditional power line carrier, but it still has some value in some occasions, especially in the medium voltage distribution network, power line communication is still an effective means. For the area where power line carrier communication is still being used, when the new carrier channel is added, it is necessary to design the frequency distribution of the new channel. But the idle power line carrier channel will have an impact on the safe operation of the line, so it is very necessary and urgent to calculate the attenuation characteristics of the channel and determine whether the vacant stopper can be removed. Therefore, in order to improve the management level of power line carrier communication, it is necessary to study the characteristics of power line carrier channel in the new situation. According to the requirement of overhead power line carrier channel management system, the system management function structure is designed in this paper. This paper analyzes the theoretical basis of frequency distribution and the method of removing the vacant stopper, compares several typical methods of frequency allocation of power line carrier communication technology, and combines with the demand of the field. This paper designs the method of frequency distribution and the removal of the vacant stopper and the corresponding flow chart. The software design of the system is realized by using Visual Basic. The test results show that the frequency distribution and the method of removing the vacant stopper in the management system can quickly and accurately realize the frequency distribution and the judgment of the removal of the vacant stopper, and the real-time management of the graphics and equipment can be realized. The function of system software meets the requirement of application. Finally, the channel model and transmission characteristics of 10kV medium voltage buried cable are analyzed and studied. By means of OFDM technology and simulation analysis, the frequency allocation method of broadband communication is given.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN913.6;TP315;TM73

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