基于北斗导航系统的智能配网线路综合监测系统研究

发布时间：2018-05-30 17:23

本文选题：数字故障指示器 + 北斗导航系统　；参考：《华北电力大学(北京)》2017年硕士论文

【摘要】：配电网与用户端直接相连,负荷种类多、电网结构复杂,线路故障特别是线路单相接地故障的查找非常困难,若此类故障不能及时排除,将导致电网运行的可靠性降低,影响整个电网的运行。在此背景下,缩小配电线路故障排查范围,提高配电网线路运维的水平和效率,确保配电网络的安全、可靠、经济运行至关重要。基于北斗导航系统的智能配网线路综合监测系统是通过在线路上安装故障指示器将线路故障信息反馈到主站系统,从而实现主动上报线路故障信息。其中,利用北斗卫星导航系统,能够实现时钟同步,因此该系统可以高度安全地实现线路故障快速定位。本文开发的基于北斗导航系统的智能配网线路综合监测系统由配电网数字故障指示器、北斗通信网络、主站系统组成,本文对这三部分进行了详细研究。研发了带北斗通信模块的新型数字故障指示器。该数字故障指示器能够检测短路故障、接地故障、过流或过负荷越限以及停电,其通讯分为两个部分,一个是数字故障指示器与北斗通信终端的通讯,另一个是北斗通信终端与主站的通讯。开发的北斗通信模块由基带芯片、射频芯片、低噪放大器和功率放大器等组成,该模块通过配置外部设备实现定位和通信功能。设计了基于短报文的北斗通信网络。在研究分析了北斗卫星导航系统短报文通信的机制、特点和限制的基础上,对北斗短报文通信的可靠传输算法进行了设计,分别设计了发送与接收流程、响应流程和补包流程,给出了发送端和接收端的程序流程图。对基于北斗短报文的动态组网方式进行了研究,该方法需要自建北斗数据中心,北斗数据中心与各通信终端形成一个星形网络结构,北斗数据中心为各终端提供的服务包括数据转发以及数据推送。开发了系统主站应用功能。主站接收通过北斗卫星通信网络发送过来的故障信息数据及定位信息数据,对数据进行存储、处理,通过拓扑分析和计算对配电网线路全面监测。阐述了主站功能开发的总体目标、主站的通信方式以及主站的主要工作流程。主站系统的主要应用功能有系统管理、线路电流预警设置、图形管理、数据查询、前置通信软件功能和后台监控软件功能。最后,对系统功能模块进行了实现,对系统实际工程应用情况进行了说明,分析了系统经济效益。本系统能够有效缩短配电网发生故障后故障定位需要花费的时间,节约人力、物力,有利于提高配电网线路运维的水平和效率,具有广阔的前景。
[Abstract]:The distribution network is directly connected with the user side, with many kinds of loads, complicated power network structure, and it is very difficult to find line faults, especially single-phase grounding faults. If this kind of fault can not be eliminated in time, the reliability of power network operation will be reduced. Affect the operation of the whole power grid. Under this background, it is very important to narrow down the scope of fault detection of distribution lines, improve the level and efficiency of operation and maintenance of distribution lines, and ensure the safety, reliability and economic operation of distribution networks. The integrated monitoring system of intelligent distribution network line based on Beidou navigation system is that the fault information of the line is fed back to the main station system by installing the fault indicator on the line so as to realize the active reporting of the line fault information. Among them, the Beidou satellite navigation system can realize clock synchronization, so the system can achieve high safety fast fault location. The intelligent distribution line integrated monitoring system based on Beidou navigation system is developed in this paper, which is composed of digital fault indicator of distribution network, Beidou communication network and master station system. In this paper, the three parts are studied in detail. A new type of digital fault indicator with Beidou communication module is developed. The digital fault indicator can detect short circuit faults, ground faults, overcurrent or overload overruns and power outages. Its communication is divided into two parts, one is the communication between the digital fault indicator and the Beidou communication terminal. The other is the communication between the Beidou communication terminal and the master station. The Beidou communication module is composed of baseband chip, RF chip, low noise amplifier and power amplifier. A Beidou communication network based on short message is designed. On the basis of studying and analyzing the mechanism, characteristics and limitations of short message communication in Beidou satellite navigation system, the reliable transmission algorithm of Beidou short message communication is designed, and the sending and receiving flow, response flow and packet filling flow are designed respectively. The program flow chart of the transmitter and receiver is given. The dynamic networking method based on Beidou short message is studied. This method needs to build the Beidou data center, and the Beidou data center and each communication terminal form a star network structure. Beidou data Center provides services for each terminal, including data forwarding and data push. The main station application function of the system is developed. The master station receives the fault information data and the location information data sent by the Beidou satellite communication network, stores and processes the data, and monitors the distribution network lines by topology analysis and calculation. The main goal of the main station function development, the communication mode of the main station and the main work flow of the master station are expounded. The main application functions of the main station system include system management, line current warning setting, graph management, data query, front communication software function and background monitoring software function. Finally, the function module of the system is realized, the practical engineering application of the system is explained, and the economic benefit of the system is analyzed. The system can effectively shorten the time spent in fault location after fault in distribution network, save manpower and material resources, improve the level and efficiency of line operation and maintenance in distribution network, and have a broad prospect.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM75

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