低壓配電系統(tǒng)電氣參數(shù)檢測終端研究

電氣自動(dòng)化論文編號:ZD229 論文字?jǐn)?shù):26914,頁數(shù):54

目     錄
引言 1
1緒論 2
1.1現(xiàn)代電氣參數(shù)檢測技術(shù) 2
1.2電參量檢測技術(shù)在電力系統(tǒng)中的地位和作用 3
1.3研究的目的和意義 3
1.4本文研究的主要內(nèi)容 4
2系統(tǒng)總體結(jié)構(gòu)和系統(tǒng)功能規(guī)劃 5
2.1系統(tǒng)功能要求 5
2.2變送器工作原理及發(fā)展回顧 5
2.3智能變送器的原理及特點(diǎn) 6
2.4參數(shù)檢測系統(tǒng)方案論證 7
2.5方案比較 8
2.4.1方案一與方案三比較 8
2.4.2方案二與方案三比較 8
2.6方案的確立 9
3系統(tǒng)硬件部分設(shè)計(jì) 10
3.1系統(tǒng)原理框圖 10
3.2單片機(jī)的選擇 10
3.3交流電壓、交流電流輸入電路 10
3.4A/D轉(zhuǎn)換電路 11
3.5A/D轉(zhuǎn)換啟動(dòng)及鎖相倍頻電路 12
3.6RS-485通訊接口電路原理圖 13
3.7顯示器接口電路設(shè)計(jì) 14
3.8鍵盤接口電路設(shè)計(jì) 15
3.9電源 16
4系統(tǒng)軟件部分設(shè)計(jì) 17
4.1算法的確定 17
4.1.1直流量算法 17
4.1.1交流量算法 18
4.2綜合電量變送器的主體軟件框圖 21
4.3監(jiān)控程序模塊 22
4.4數(shù)據(jù)采集和處理模塊 23
4.5通信模塊 24
4.6軟件抗干擾的設(shè)計(jì) 28
5實(shí)驗(yàn)調(diào)試及結(jié)果分析 29
5.1硬件調(diào)試 29
5.1.1測試準(zhǔn)備工作 29
5.1.2互感器及I/U轉(zhuǎn)換電路調(diào)試 29
5.1.3A/D轉(zhuǎn)換器調(diào)試 29
5.1.4鎖相倍頻電路調(diào)試 30
5.2軟件調(diào)試 30
5.2.1計(jì)算程序的調(diào)試 30
5.2.2通信調(diào)試 30
5.2.3系統(tǒng)校準(zhǔn) 30
5.3聯(lián)機(jī)調(diào)試 31
5.4測試結(jié)果分析 31
5.4.1測試結(jié)果 31
5.4.2誤差分析 32
總結(jié) 34
致謝 35
參考文獻(xiàn) 36
附錄A芯片MAX180介紹 37
附錄B鎖相環(huán)CD4046介紹 38
附錄CRS-485總線介紹 40
附錄D程序清單 42
英文文獻(xiàn)原文 46
英文文獻(xiàn)翻譯 48

[摘要] 電參數(shù)檢測技術(shù)作為電網(wǎng)自動(dòng)化控制的基礎(chǔ)，在電網(wǎng)安全經(jīng)濟(jì)運(yùn)行方面具有極其重要的作用。本設(shè)計(jì)實(shí)現(xiàn)基于單片機(jī)的綜合電量變送器測量系統(tǒng),無論是數(shù)據(jù)采集還是數(shù)據(jù)處理都是由單片機(jī)控制及完成。硬件部分中設(shè)計(jì)了交流電壓、交流電流輸入電路、A/D轉(zhuǎn)換回路、鎖相倍頻電路、通信接口電路和顯示和鍵盤接口電路。軟件部分則是以一周期內(nèi)采集的數(shù)據(jù)為檢測對象，用數(shù)字信號處理技術(shù)對采樣的數(shù)據(jù)進(jìn)行分析，用單片機(jī)進(jìn)行編程，實(shí)現(xiàn)交流電參量和直流電參量分析及顯示功能。諧波分析則采用了傅立葉算法，可以濾除10次以下的整次諧波，對高頻的非整次諧波也有較好的濾波作用。該設(shè)計(jì)能夠保證較高的精度和運(yùn)算速度，同時(shí)具有良好的性能和抗干擾能力，可直接實(shí)時(shí)檢測、控制現(xiàn)場生產(chǎn)過程中強(qiáng)電裝置，同時(shí)可進(jìn)行網(wǎng)絡(luò)通信，對發(fā)電檢測和用電管理有著重要的作用。
   [關(guān)鍵詞]電量  智能變送器  檢測  單片機(jī)  同步采樣  算法  串口通信
 
 
 
  Examination terminal of low voltage distribution
system’s electricity parameters research

 Abstract: The electrical parameter examination technology, as the foundation of the electrical network automation control, plays an extremely vital role in the electrical network security economy movement aspect. The design is realized complex electric parameter transducer based on single chip, no matter of signal sampling or data handling are all fulfilled by single chip. The hardware design have completed altering current and altering voltage input circuit, analog to digital conversion circuit, phase-lock doubling circuit and communication interface, display interface , keyboard circuit. Meanwhile, the part of software has realized the function of the alternating electricity parameter analysis, the directing electricity parameter analysis and the demonstration, which is taking the sampled data in a sampling cycle as the examination object, and carrying on the analysis with the digital signal processing technology to the sampling data, and then programming with single chip. Finally, the harmonic analysis, using the Forier Transform Algorithm, filter the whole time harmonics which are less than 10 order and have a good effect on the filtration of the high frequency non-whole time harmonics. This intelligent transducer has high computation precision and velocity, outstanding capability and the facility of counter interference. This intelligent transducer, realizes the real-time examination and control the directly connecting strong electricity equipment in the local production processing, simultaneously communication through the system network, play an important role in the generate electricity examination and using electricity supervision.
 Key words: quantity of electricity, intelligent transducer, measurement, Single chip, synchronized sampling, algorithm, serial communication