摘要随着各种冲击性、非线性的电力设备负载投入到电网使用，电网产生了许多 质量问题，比如：电压扰动、闪变和谐波等。而一些新型的电子仪器和自动化设 备对电网电能质量的要求变得越来越高。为了能及时了解电能质量以及为提高电 能质量提供科学依据，电压电流的检测装置必不可少。83777

本文以三相电压、电流的测量为对象，设计一种基于 ARM LPC1788 的检测 系统，能够对电网中电压、电流及其相关电能质量参数进行实时监测，监测结果 在 LCD 上显示。论文主要完成以下工作：

(1)描述了电能质量研究背景与国内外对电能量检测装置的研究发展现状， 阐述了电能质量标准与参数测量方法，分析了电能质量问题的现象。

(2)设计了基于 ARM LPC1788 的电压、电流检测系统的硬件结构与原理图， 包括电压、电流信号的检测电路、信号调理电路，ARM 的最小应用系统以及 LCD 显示系统。

(3)依据硬件电路以及系统功能的要求，设计了软件系统，包括主程序以及相 关的子程序。

(4)借助 ARM 的开发工具 MDK 以及 LPC1788 学习板对所设计的软、 硬件 系统进行了模拟调试。调试结果表明：能够正确测量并显示电压、电流及相关参 数值。

毕业论文关键词：电能质量，检测装置，LPC1788，信号调理，LCD 显示

Abstract With a variety of impact, nonlinear power equipment load into the power grid, the grid has a lot of quality problems, such as: voltage disturbance, flicker and harmonic, etc。。 And some new types of electronic equipment and automation equipment to the power quality requirements of the power grid is becoming higher。 In order to provide a scientific basis for the timely understanding of power quality and to provide a scientific basis for the improvement of power quality, voltage and current detection device is essential。

Based on the object of three-phase voltage and current measurement, design a detecting system based on ARM LPC1788 to the grid voltage, current and electric energy quality parameters in real-time monitoring, the monitoring results on the LCD display。 This paper mainly completes the following work:

(1)Describe the research background of the power quality and the development status of the research and development of the electric energy measurement device at home and abroad, the power quality standard and the parameter measurement method are expounded, and the phenomenon of power quality problem is analyzed。

(2)Design the hardware structure and schematic diagram of voltage and current detection system based on LPC1788 ARM, including the detection circuit of voltage, current signal, signal conditioning circuit, the minimum application system of ARM and the LCD display system。

(3)According to the requirements of the hardware circuit and the system function, the software system is designed, including the main program and the related subroutine。

(4)With the aid of ARM development tool MDK and LPC1788 learning board, the software and hardware system are simulated and debugged。 The debugging results show that the voltage, current and related parameters can be measured and displayed correctly。

Keywords: Power quality，Detection device，LPC1788，Signal conditioning， LCD display

目 录

第一章 绪论 1

1。1课题提出背景及意义 1

1。2国内外电能质量检测的发展研究状况 2

1。2。1 国外的发展研究状况 2

1。2。2 国内的发展研究状况 2

1。3本文主要工作