基于MSP430F449单片机电能质量检测装置总体设计.doc

摘 要 关键词； Abstract Power quality monitoring is a key part for the controlling of power quality. It also play an important role in supervising and managing of power system, and at the same time it is a necessary means for providing better power quality .It is of great importance to research and develop a powerful functions power quality monitoring system, which can note indexes of power quality and can supervise polluting sources during running in detail, then provide evidence for improving and renovating the power quality, and ensure the security, stabilization, economy of the power system. Based on analyzing of the power quality indexes and its synthetical evaluation methods, this article designs a power quality monitor and its software. In this paper, a power quality monitoring system based on MSP430F449 was put forward. Blocking method was adopted in designing of the system hardware, which contained analog part and digital part, and synchronous sampling of alternating current signals was realized by Phase-locked and double frequency circuits. Blocking method employing FFT was also adopted in designing of the system software, which included system initializing, software of the measured indexes and interface of the LCD. Keywords: Survey of Power quality; Synchronous sampling; FFT；MSP430F449 不要删除行尾的分节符，此行不会被打印目 录 摘 要 I Abstract II 第1章 绪论 1 1.1 课题背景及意义 1 1.2 国内外研究现状及电能质量监测的发展趋势 1 1.3 本文结构 2 第2章 系统原理设计 4 2.1 交流采样原理 4 2.2 电能质量参数算法 5 2.3 本章小结 13 第3章 系统硬件设计 14 3.1 系统的整体方案 14 3.2 模拟部分设计 15 3.3 数字部分设计 18 3.4 本章小结 21 第4章 软件部分设计 22 4.1 设计原则 22 4.2 程序流程图 22 4.3 本章小结 26 第5章 调试及运行结果 28 5.1 硬件电路的调试 28 5.2 系统运行结果测试 30 5.3 误差分析 31 结 论 33 致 谢 34 参考文献 35 附 录 信号采集调理电路原理图 37 千万不要删除行尾的分节符，此行不会被打印。在目录上点右键“更新域”，然后“更新整个目录”。打印前，不要忘记把上面“Abstract”这一行后加一空行绪论课题背景(Embedded Systems)的飞速发展，使得操作系统的设计思想被引入到电能质量监测领域。例如：基于的Micro-windows，MINI-GUI，基于的等等。这些方法的引入提高了系统的可靠性和稳定性，使开发难度大大降低。 本文结构 本文将围绕设计系统的过程展开。一个主要包括模块、模块和模块本文主要内容如下： 第2章中，对，并给出了 第3章中，。 第4章中，首先详细介绍了第5章中， 最后对毕业设计工作进行了总结。 交流采样原理 一