摘要电能是日常生活中使用最广泛的能源。由于近年来电力电子技术的发展，整流器，变频器，一级电弧炉等各种非线性负载的广泛使用，给电网带来了非常大的压力，因此对电网电流的监测非常重要。本系统正是为了解决这个问题而设计的一套电网电流监测系统，本系统包括了电流采集电路，12864显示电路，键盘控制电路等一些单片机工作的必备电路。其中电流采集是先通过电流互感器将大电流感应成小电流再通过电流采集电路采集，电流采集电路使用了MB6S整流器和滤波电路，再将采集到的电流经过放大器放大并通过负载转成电压通入单片机，单片机使用12位A/D转换，使得采集到的电流更加的准确稳定。系统为了更好的进行人机交互，软件方面设计了12864显示和键盘操作，其中12864显示实时电流，过载电流等一些信息，键盘则有上下左右，确定取消等功能键，更方便用户操作。这一套系统实现了实时采集电网电流并实时显示，和通过手机远程实时显示和控制。由于使用了GPRS模块与上位机远程交互，使得监测与控制能更加的方便。46449
毕业论文关键词：电网电流；MSP430；GPRS模块；
ABSTRACT Electricity is the most widely used energy in daily life.Due to the development of power electronic technology in recent years, rectifier, inverter, the level of electric arc furnace and the widespread use of nonlinear load to the power grid has brought the very big pressure, so the grid current monitoring is very important.This system is designed in order to solve this problem, a set of grid current monitoring system, this system includes the current sampling circuit, 12864 display circuit, keyboard control circuit and so on some necessary circuit microcontroller work.The current collection is first through current transformer to large current induction into small current by current sampling circuit, current sampling circuit using MB6S rectifier and filter circuit, then collected the electrical current into the single chip microcomputer, microcontroller using 12 bit A/D conversion, make current collected more accurate and stable.System in order to better for human-computer interaction, software design of the display and keyboard operation, 12864 of which 12864 displays real-time current, overload current some information, such as the keyboard is up and down or so, determine the cancel key functions, such as more convenient user operation.This system has realized the real-time acquisition and real-time display grid current, and remote real-time display and control by mobile phone.With the use of GPRS module and mobile phone remote sensing, monitoring and control can be more convenient.
Key words：electric net current；MSP430；GPRS module；
目  录
第一章  研究背景和意义    1
1.1    GPRS背景    1
1.2    电网电流监测背景    1
1.3    低压断路器背景    2
1.4    本课题的研究意义    2
第二章  课题研究的基本内容及方案    3
2.1    基本内容    3
2.2    电流监控电路    3
2.2.1    电流监控电路的组成部分    3
2.2.2    断路器的长延时脱口    3
2.2.3    断路器的短延时脱扣    3
2.2.4    断路器的瞬时特性    3
2.2.5    电流互感器    3
2.3    GPRS通信内容    4
2.3.1    GPRS通讯部分组成内容    4
2.3.2    GPRS模块的通信方式    4 基于GPRS电网电无线流监测系统设计+程序:http://www.youerw.com/tongxin/lunwen_48158.html