【作者】 汪祥；

【导师】 郎兵；

【作者基本信息】 北京交通大学 ， 电力系统及其自动化， 2007， 硕士

【摘要】 在现代电力系统中,继电保护装置是保证电力系统安全运行和提高电能质量的重要工具,而且电力系统的规模在不断扩大,用户对电能质量的要求也在不断提高,因此,对继电保护装置本身的要求也越来越高了。本文分析了微机继电保护装置的发展趋势,根据电力市场的需要及现有输电线路微机保护的现状,开发研制出一套适合于35KV小电流接地电网的微机线路保护装置。该装置集保护、测量、控制、监测、通讯等功能于一体。产品在硬件上采用分离板的形式设计。按照功能可分为:主板(CPU)、交流输入单元(PTCT)、开关量输入直流输入单元(DIDC)、操作回路(OPERATE)、人机接口(MMI)和电源单元(POWER)等插件。文中分别介绍了各插件的硬件设计,以TMS320F2812为核心器件完成数据的采集与处理、保护功能、输入输出控制和通讯等功能,同时为了简化电路结合CPLD的优越性,将复杂的DSP片外逻辑组合在CPLD片内实现,将一些需要耗用大量等待时间的工作交给CPLD模块来实现。该装置不仅实现了电力系统的实时测控和三段式电流保护功能,还集成了零序电流保护、低频减载、自动重合闸等功能。软件方面重点介绍了DSP的开发环境CCS(Code Composer Studio),在软件开发上采用C语言和汇编语言相结合,结合保护软件的设计具体介绍了在CCS中文件的开发和编写。对所研制的保护装置进行了模拟实验,实验结果证明:所配置的保护元件合理,实施方案有效,具有良好的动作特性和可靠性。最后提出了系统需进一步改进的方案。更多还原

【Abstract】 Protection relays servers as an important tool to make sure the safe of operation of power; also they will greatly improve the quality of power supply in nowadays. With the expansion of power system and increasing requirement of consumers for power quality, the protection relay must be greatly improved to fulfill the requirement. Based on the analysis of the development of the protection relays, and according to the need of power market and the actuality of microcomputer-based line protection, this paper has worked out a set of MBLP device for 35kv transmission lines. This product integrates protection, measurement, control, and communication functions.The product adopts separation asbestos sheet in the hardware design. According function can be divided into: the Main Board (CPU), alternative current input module (PTCT), Switch input DC input modules (DIDC), Operating circuit (OPERATE), MMI and Power Module (POWER) plug-in Boards. This paper introduced the plug-in hardware design, the device uses TMS320F2812 as the main CPU for sampling dates and fulfilling protective functions, input and output control. In order to make the hardware frame simplicity, complex DSP chip logic are putted in the CPLD logic chip to achieve, also Some signal will need to spend a lot of time waiting for are achieved by the CPLD module. This instrument not only can perform functions of protection monitoring and current protection, but also integrates the functions of zero-sequence current protection, under frequency load shedding and automatic recloser.Software focuses on the DSP development environment CCS (Code Composer Studio), using C and Assembly Language combination in development of protection software designed and specifically describes the preparation of document in CCS.The protection instrument has been tested on a simulation system model. It is showed that the protective functions are suitable and it has good performance. Finally, the system needs further improvement program.更多还原