資源描述:
《基于dsp的電力系統(tǒng)諧波檢測(cè)裝置的設(shè)計(jì)》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在教育資源-天天文庫(kù)。
1、北華大學(xué)畢業(yè)設(shè)計(jì)(論文)摘 要隨著現(xiàn)代電力電子設(shè)備和非線性負(fù)載的大量使用,諧波污染日趨嚴(yán)重,諧波己成為電力部門及其用戶日益關(guān)注的問(wèn)題,因此對(duì)諧波進(jìn)行檢測(cè)與分析具有重要的意義。本文首先介紹了國(guó)內(nèi)外電力系統(tǒng)諧波測(cè)量裝置的現(xiàn)狀,分析了數(shù)字信號(hào)處理芯片在電力系統(tǒng)中的應(yīng)用情況,對(duì)諧波分析的相關(guān)理論與技術(shù)進(jìn)行了研究,設(shè)計(jì)了以DSP為核心的硬件與軟件系統(tǒng)。硬件設(shè)計(jì)方面,根據(jù)電力系統(tǒng)中數(shù)據(jù)采集和處理的實(shí)際特點(diǎn),設(shè)計(jì)了信號(hào)的多通道采樣保持和時(shí)鐘轉(zhuǎn)換電路,實(shí)現(xiàn)了多路信號(hào)的同步采樣和快速轉(zhuǎn)換。充分發(fā)揮了微控制器的控
2、制功能和DSP芯片的數(shù)字信號(hào)處理優(yōu)勢(shì)。軟件算法方面,系統(tǒng)采用傳統(tǒng)的快速付立葉變換(FFT),對(duì)采集的電壓和電流信號(hào)進(jìn)行頻譜分析。論文中還詳細(xì)分析了信號(hào)的采樣問(wèn)題,以及信號(hào)的數(shù)字濾波問(wèn)題。初步設(shè)計(jì)了對(duì)采集數(shù)據(jù)進(jìn)行計(jì)算和處理的相關(guān)軟件算法,實(shí)現(xiàn)了對(duì)諧波的測(cè)量功能。本裝置可以快速、準(zhǔn)確地進(jìn)行諧波的測(cè)量和分析。關(guān)鍵詞是為了文獻(xiàn)標(biāo)引工作從論文中選取出來(lái)用以表示全文主題內(nèi)容信息款目的單詞或術(shù)語(yǔ)。如有可能,應(yīng)盡量用《漢語(yǔ)主題詞表》等詞表提供的規(guī)范詞。不用此信息時(shí),刪除此框。關(guān)鍵詞:DSP;諧波;同步采樣;快速
3、傅里葉變換-2-北華大學(xué)畢業(yè)設(shè)計(jì)(論文)AbstractWiththewideapplicationsofmodernpowerelectronicsequipmentandnonlinearload,harmonicdeteriorationhasincreasedrapidly,whichhasattractedgreatattentionsbypowerdepartmentandusers.Byanalyzingthesituationsoftheelectricharmonicmonit
4、oringequipmentshomeandabroad,aimingatthedemandofpowerdepartmentandpracticalapplication.TheapplicationofDigitalSignalProcessorintheelectricpowersystemsisintroducedinthispaper,itaimsattheharmonictheoriesandtechnologiesanalysisandexploitsahardwarefloora
5、ndasoftwaresystemwithDSPcore.Thehardwaredesignaspect,accordingtotheelectricalpowersysteminthedataacquisitionandtheprocessingactualcharacteristic,hasdesignedthesignalmultichannelsamplingmaintainswiththeswitchingcircuit,hasrealizedthemulti-channelsigna
6、lsynchronizedsamplingandthesplit-second-selection.Hasdisplayedthemicrocontroller'scontrolfunctionandtheDSPchipdigitalsignalprocessingsuperiorityfully.Thesoftwarealgorithmaspect,thesystemusesthetraditiontopayfastsetsuptheleaftotransform(FFT),carrieson
7、thespectralanalysistothegatheringvoltageandtheelectriccurrentsignal.Inpaperalsomultianalysissignalsamplingquestion,aswellassignaldigitalfilteringquestion.Thepreliminarydesignhascarriedonthecomputationandtheprocessingrelatedsoftwarealgorithmtothegathe
8、ringdata,hasrealizedtotheovertonesurveyfunction.Thisequipmentmaybefast,accuratecarriesontheovertonethesurveyandtheanalysis.KeyWords:DigitalSignalProcessor;Harmonic;Synchronoussampling;FastFourierTransfer-2-北華大學(xué)畢業(yè)設(shè)計(jì)(論文)目 錄摘 要1Abstract2引 言11緒論21.1問(wèn)題