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摘要在这个工业化进程急剧加快的时代，电气设备发展的尤为迅速，各种各样的用电设备和电力电子器件被人们投入到使用中。同时又由于人们对于各种电力设备性能要求的加强，电网中供电输电过程中的大量谐波也影响电力系统设备的正常安全稳定的运行，这已然成为当今电网的主要危害。因此谐波的检测因运而生，成为了当前人们主要关注的一个研究课题。
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本文首先分析了电力系统谐波检测的重要意义和目的以及当前国内外该课题的发展现状和趋势。通过功能分析确定使用DSP芯片TMS320F2812和AD8364为核心，主电路包含以下几个模块：信号采集、A/D模数变换、信号处理和数据通信、接口模块。其中AD8364主要完成电网数据的采集,而2812主要完成了数据信号的处理任务。电网信号通过电压互感器和电流互感器转变成可处理的模拟信号,然后通过信号调理电路将传输过来的信号转换为A/D可接受范围内的信号，然后经过8364完成模数转换成为数字信号。再由2812完成信号处理，最后经过接口电路完成信号输出任务。32304
关键词 电力系统谐波检测 TMS320F2812 信号调理 CAN接口
毕业论文设计说明书外文摘要
Title Hardware design of power system harmonic detection
Abstract
In this era of industrialization accelerated dramatically, a variety of electrical equipment and power electronics are put for people to use.While because of the electrical equipment for a variety of performance strengthening requirements, power transmission grid in the process of a large number of harmonics also affects the normal power system security and stable operation of equipment, which has become a major hazard in today's grid.Therefore detection of harmonics appear, as the current focus of research.
This paper analyzes the power system harmonic detection significance and purpose as well as the current status and trends at home and abroad.This article contains the following modules of the design: the signal acquisition, A/D analog-digital conversion, data processing and data communications interface module. Via a connection between several modules interact to complete the design requirements.
This design of circuits are based on ADS8364 and TMS320F2812 as the core.,where the 8364 main grid data collection is completed, the completion of the 2812 main data signal processing tasks.Grid signal voltage and current transformers into analog signals that can be processed, and then through the signal conditioning circuit transmission over the signal into a signal in the A/D acceptable range, and then after 8364 the analog to digital converter into a digital signal.Then from 2812 complete signal processing, and finally through the interface circuit signal output tasks. The above system has been associated test results meet the final requirements of this project.
Keywords power system harmonic detection TMS320F2812 signal conditioning CAN
目 次
1 绪论 1
1.1 课题研究的目的和意义背景 1
1.2 国内外研究现状 1
1.3 本文的工作 2
2 谐波分析与检测 4
2.1 谐波的定义与危害 4
2.2 电力系统谐波指标 4
2.3 本章小结 5
3 电力系统谐波检测硬件设计 6
3.1 硬件电路整体框架 6
3.2 电力系统谐波检测方法 6
3.3 DSP最小系统设计 7
3.4 信号采集与调理电路设计 10