基于ADE7758的電能監測系統的設計

電子機電論文編號:JD137  附開題報告,大圖,字數:14100,頁數:41

目    錄
摘    要.................................................................... I
Abstract ...................................................................II
1 緒論 ...................................................................- 1 -
1.1課題的來源及選題的依據................................................ - 1 -
1.2國內外發展現狀及趨勢.................................................  - 1 -
1.3課題研究意義.........................................................  - 3 -
1.4本文主要工作.........................................................  - 3 -
2系統總體設計 ........................................................... - 5 -
2.1測量原理 ............................................................. - 5 -
2.1.1電能計量模塊對電壓有效值、電流有效值的測量.......................... - 5 -
2.1.2電能計量模塊對功率的測量...........................................  - 5 -
2.2系統結構設計 ................................................ .........- 6 -
3系統硬件設計 ........................................................... - 8 -
3.1輸入變換單元.........................................................  - 8 -
3.1.1電源電路 ........................................................... - 8 -
3.1.2互感電路 ........................................................... - 9 -
3.2微機處理器單元.......................................................  - 10 -
3.2.1 ADE7758的使用................................................  .....- 10 -
3.2.2 AVR單片機 ......................................................... - 12 -
3.2.3存儲電路................................................ ........... - 15 -
3.2.4鍵盤電路................................................ ........... - 16 -
3.3點陣12864顯示................................................  ........- 16 -
3.3.1 12864點陣型液晶顯示器的顯示原理 ................................... - 16 -
3.3.2 12864液晶顯示器的外部引腳 ..........................................- 17 -
3.3.3 12864讀寫控制................................................  .....- 18 -
3.4通信單元................................................ ............. - 18 -
4系統軟件設計................................................ ........... - 21 -
4.1鍵盤程序 ................................................ .............- 21 -
4.2顯示程序 ................................................ .............- 22 -
4.3 ADE7758讀寫程序 ..................................................... - 23 -
4.4 24C256數據存儲程序 .................................................. - 24 -
結論................................................ .................... - 25 -
參 考 文獻................................................ ............. - 26 -
附錄 ................................................ ...................- 27 -
1 Protel原理圖 .......................................................... - 27 -
2 部分程序清單................................................ .......... - 28 -
致    謝................................................................  - 36 -

摘    要
隨著我國經濟的高速發展和人民生活水平的提高，用電量迅猛增加。電參數的準確、快速測量及信息傳遞對于實現電網調度自動化、保證電網安全與經濟運行具有十分重要的意義，并且提高了國家電力管理部門的工作效率和經濟效益。
本設計以單片機ATmega16為核心，電能采集部分采用美國模擬器件公司最新推出的專用高性能、高精度電能計量芯片ADE7758。它具有監測多路電壓有效值、電流有效值、功率因數以及有功功率、無功功率、視在功率等電能信息的功能。采集到的電能信息可以通過RS-485通信方式與電能信息管理系統實現互連。12864實時顯示各種計量信息。
本文簡述了電力儀器的發展現狀，說明了智能儀表開發的步驟方法和基本原理，重點介紹了ADE7758和AVR系列單片機的特點，根據系統的技術要求和功能特點確定了總體設計和硬件實現方案，將整個硬件系統配置分為微處理系統、輸入變換系統、通信接口、12864點陣顯示系統四大部分，并在此基礎上，詳細介紹了整個系統各個部分的軟硬件開發過程。系統采集數據豐富，工作穩定可靠，測量精度高，凸顯了智能性。

關鍵詞：ADE7758；ATMEGA16；電能測量；12864

Abstract
With the high development of our economy and the improvement of our living level，the electric power consumption is increasing greatly. It is very important for the implement of attempting automatically，assurance safety and economical running the electric Power network with fast and accurate testing and passing their parameters. It can also effectively help to improve the work and economy efficiency of our national power management.
Design of system is based on MCU ATmega16. Special electric power measurement chip named ADE7758 produced by AD Corporation is used for the collection of electric power. ADE7758 is a newest production with high precision. The ADE7758 is a high accuracy 3-phase electrical energy measurement IC. It can monitor the electric information of six passages，including active, reactive, apparent energy，VRMS，IRMS，power factor and etc. RS-485 can realize the inter link between the data and electric power information management system. 12864 can display multifarious real-time information of electric power.
 In all，firstly，this paper introduce the development of electric instrument and the develop process and basic method of intelligent. Specially，the characteristic of ADE7758 and AVR microprocessor are introduced. Secondly，according to the technique index and function characteristic，it should decide the realization scheme of the whole system and divide whole system into four parts such as input transform system，AVR microprocessor，communication system，12864 display. Thirdly，base on the whole system scheme，the soft and hardware process of every part is described. The system can collect plentiful data information，work stably and reliable. Moreover，it has high accuracy and obvious intelligence. 

Keywords:  ADE7758; ATMEGA16; energy measurement; 12864