电力载波通信抄表集中器硬件设计.docVIP

摘要 随着国民经济的迅速发展，电网的负荷量不断增长，负荷结构越来越复杂，这就对供电质量、可靠性以及信息化程度提出了更高的要求。电力自动抄表系统是一种以计算机技术、通信技术为基础，用于自动获取用电信息的现代化系统，它的应用能够明显提高电力公司的自动化水平，满足电力公司对于用电管理的信息化需求。 本文讲述了本课题的背景以及国内外发展现状，并对典型的电力远程自动抄表系统的构成做了简单介绍，随后介绍了本课题的主要研究内容并参照国家电网的相关标准提出了本设计的设计指标。 首先，本文对集中器可采用的通信信道进行了介绍和对比，并最终确定上行通信采用GPRS和以太网、下行通信采用RS-485的通信方案。 然后，本文对集中器的软硬件设计进行了详细介绍。硬件方面，在对Cortex-M3以及LM3S9896简单介绍之后，对集中器各个功能模块进行了设计，主要包括GPRS通信接口模块、以太网通信接口模块、RS-485通信接口模块、时钟模块、存储器模块、键盘、显示器以及电源模块。 关键词：远程抄表 集中器 GPRS 以太网 ABSTRACT Along with the rapid development of economy in our country，the electricity consumption increasing，the load structure become more and more complex，all these ask for higher power supply quality，more reliable，and higher informatization level Electricity automatic meter reading system is a kind of modem system technology based on computer and communication technology，used to automatically obtain electricity information.Its application can obviously improve the automation level of power companies,satisfy the requirement of the electric power company for management of electric infomationization. This paper tells me backgrounld of this topic，the present development situation of China and foreign countries，the structure of typical remote concentrated meter reading system and the main research content of this subject，then puts forward the indexes of this design by refering to the National Grid’s relevant standard． First of all，in this paper，the communication channels can be chosed in the concentratoin are introduced and compared，and ultimately detemine using GPRS and Ethemet as the upward communication channel，RS-485 as the downward communication channe1． Then，in this paper，the hardware and software design of concentrator is introduced in details．In terms of hardware，after introduced the architecture of Cortex-M3 and LM3S9B96, concentrator’s every function module was designed,mainly includes the GPRS communication interface module，Ethernet communication interface module,RS-485 communication interface module,clock m