【作者】 李勇；

【导师】 吴建平；

【作者基本信息】 成都理工大学 ， 测试计量技术及仪器， 2010， 硕士

【摘要】 近年来,经济的快速发展对我国电力工业的发展提出了更高的要求,提供更多的电能,具备更高的供电可靠性,更小的线路损耗,更长的使用寿命,更少的维护工作等等。针对上述要求,国家对电厂实行“西电东送”和“关停并转”等措施,解决供需矛盾,对电网进行“城网农网改造”,进一步优化电网结构,减少线损,在变配电所实行配网综合自动化,提高可靠性,进而达到无人值守。其中一个很重要的方面就是对开关及开关柜运行状态进行监控,传统的开关柜与现代电子技术相结合的智能化开关柜应运而生,它一方面满足传统开关柜的基本功能要求,另一方面将微电子技术引进柜内,使其有自检、自控和自我诊断的新功能,以满足配电网综合自动化的需要。一些高新技术如传感器技术、微电子技术、计算机技术和信息技术的飞速发展及其在各工业领域的成功应用,使智能化开关柜的开发和应用成为可能。本文配变监测终端的主要设计目标是:实时采集配电系统运行的模拟量和状态量,要求高精度、高准确性;接收中心站查询命令,将最新测量结果上报主站;能自动检测与识别配变故障,若有异常,立即向中心站发送告警消息和测量数据,同时,根据中心站命令控制外部开关设备;监测设备自身具有故障自检及自恢复功能;保证终端工作可靠性,满足电磁兼容性要求。本文的主要内容包括:首先,对目前国内传统开关柜与国外先进的智能开关柜进行了系统的分析和比较,指出了两种存在的不同及优缺点,并对目前国内传统开关柜提出了智能化改造设想,提出了系统设计思想。其次,分析了终端配电状态监控系统的硬件设计。系统硬件采用了芯片模块化并协同工作设计思想,单片机控制数据采集,这样设计的目的是为了提高数据采集的速度和精度,现场总线通讯芯片负责数据的上传和下载,两部分属独立设计,两者组成了本次设计的硬件电路。此外还详细介绍了硬件系统中的滤波电路设计、信号采集电路设计、显示按键单元设计、开关量输入及输出单元设计等。最后,介绍了系统固件程序设计和应用程序功能模块。系统固件程序包括单片机主程序、中断程序和SPC3的初始化程序等;应用程序包括:数据采集应用模块图、显示应用模块图、从站上传数据应用模块图,从站下载数据应用模块图等。更多还原

【Abstract】 In recent years, rapid economic development on the development of China’s power industry has put forward higher requirements: to provide more power, with higher reliability, smaller line loss, longer life, less maintenance and so on. in response to these requests, the state of the power plant implementation of“West to East”and”Guantingbingzhuan”and other measure to resolve the contradiction between supply and demand on the grid for“City Network Rural reform”, and further optimize network structure, reduce line loss, in the implementation of substation distribution network automation system, improve reliability, and thus achieve unattended. one very important aspect of the switch cabinet to monitor the status of traditional switchgear with modern electronic technology combined with the intelligent switch cabinet came into being, which on the hand traditional switchgear to meet the basic functional requirements, and the other regard to the introduction of microelectronic technology cabinet, so there is self, self-control and self-diagnostic features to meet the needs of distribution managements system. Some high-tech.such as sensor technology,microelectronics,computer technology and the rapid development of information technology and its success in various industrial applications, intelligent switchgear to the development and application possible.Distribution Transformer Terminal article the main design goals are: real-time acquisition of the analog distribution system operation and status volume, quires high precision, high accuracy; reception center station inquire command, the geophysicists have reported the main points; can automatically detect and the distribution transformer fault indentification,if unusual, immediately to the center stations in Alert messages and measurements at the same time, according to central station command and control of external switch device; monitoring device itself has a fault self-test and self-recovery functions; to ensure the reliability of the terminal work to meet electromagnetic compatibility requirements.The main content of this paper includes:First, the traditional domestic and foreign advanced intelligent switchgear for a systematic analysis and comparison, that the existence of two different advantages and disadvantages, and the traditional switchboard domestic reform ideas proposed intelligent system is presented design.Secondly, the analysis of the distribution terminal condition monitoring system hardware designs. Using modular hardware and chip design to work, MCU control data collection, this design aims to improve the speed and accuracy of data collection, field bus communication chips for data uploads and downloads the two parts of an independent design, the two formed the design of this hardware. In addition, details of the hardware system filter circuit design, signal acquisition circuit design, display design of Key modules, digital input and output cell design.Finally, the introduction of the system design and application firmware modules, System firmware, including single chip main program, interrupt procedures and SPC3 initialization procedures; applications include: data acquisition application modules, showing application module map, upload the data from the station application module map, from the station to download data application block diagram and so on.更多还原