一、電能質量分析記錄儀是什么儀器
電(dian)(dian)(dian)(dian)(dian)(dian)能質(zhi)量(liang),從普遍意義上講(jiang)是指優質(zhi)供電(dian)(dian)(dian)(dian)(dian)(dian),包(bao)括(kuo)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)質(zhi)量(liang)、電(dian)(dian)(dian)(dian)(dian)(dian)流質(zhi)量(liang)、供電(dian)(dian)(dian)(dian)(dian)(dian)質(zhi)量(liang)和(he)用電(dian)(dian)(dian)(dian)(dian)(dian)質(zhi)量(liang),其可以(yi)定(ding)義為:導致用電(dian)(dian)(dian)(dian)(dian)(dian)設備故障(zhang)或不能正常工作的(de)電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)、電(dian)(dian)(dian)(dian)(dian)(dian)流或頻率的(de)偏差(cha),其內(nei)容包(bao)括(kuo)頻率偏差(cha)、電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)偏差(cha)、電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)波動與閃變、三(san)相(xiang)不平衡、暫時(shi)或瞬態過電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)、波形畸變(諧波)、電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)暫降、中(zhong)斷、暫升以(yi)及供電(dian)(dian)(dian)(dian)(dian)(dian)連續(xu)性等。在現代(dai)電(dian)(dian)(dian)(dian)(dian)(dian)力系統中(zhong),電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)(ya)暫降和(he)中(zhong)斷已成為最(zui)重要的(de)電(dian)(dian)(dian)(dian)(dian)(dian)能質(zhi)量(liang)問題。
電能質量分析記錄儀,是(shi)對電(dian)網運行(xing)質量(liang)(liang)進(jin)行(xing)檢測(ce)及(ji)分析(xi)(xi)的(de)(de)(de)專用便攜式產品(pin),可以提供(gong)電(dian)力運行(xing)中的(de)(de)(de)諧波分析(xi)(xi)及(ji)功率品(pin)質分析(xi)(xi),能夠(gou)對電(dian)網運行(xing)進(jin)行(xing)長(chang)時間的(de)(de)(de)數(shu)(shu)據采集監測(ce),同時配(pei)備電(dian)能質量(liang)(liang)數(shu)(shu)據分析(xi)(xi)軟件,對上傳至計算機的(de)(de)(de)測(ce)量(liang)(liang)數(shu)(shu)據進(jin)行(xing)各種分析(xi)(xi)。
電能質(zhi)量分(fen)析(xi)記錄儀(yi)是一種測(ce)試儀(yi)器,隨著大小設(she)備用(yong)電的各個方(fang)面(mian)越來(lai)越重(zhong)要(yao),它在電氣和電子行業(ye)應用(yong)也越來(lai)越廣泛。
二、電能質量分析記錄儀的結構組成
電能(neng)質量(liang)分析記錄(lu)記錄(lu)儀主要由五部分組成,分別(bie)為測量(liang)變換(huan)模(mo)塊、模(mo)數(shu)轉換(huan)模(mo)塊、數(shu)據處理模(mo)塊、數(shu)據管理模(mo)塊以及外圍模(mo)塊。
其中測(ce)量變換模(mo)(mo)(mo)塊(kuai)(kuai)由電壓(ya)互感器、電流互感器以(yi)及(ji)(ji)信號調理電路組成;數據處理模(mo)(mo)(mo)塊(kuai)(kuai)包含DSP以(yi)及(ji)(ji)外部(bu)存(cun)儲(chu)器SDRAM與FLASH;外圍(wei)模(mo)(mo)(mo)塊(kuai)(kuai)由顯示、存(cun)儲(chu)以(yi)及(ji)(ji)通信子模(mo)(mo)(mo)塊(kuai)(kuai)組成。
三、電能質量分析記錄儀的原理是什么
電能質量分析記錄儀是一種專用于分析記錄電(dian)網運行質量(liang)的(de)儀(yi)表,它主要利用的(de)是電(dian)信號被轉(zhuan)換成數字信號的(de)原(yuan)理,對電(dian)網運行質量(liang)進行檢測(ce)和分析,具(ju)體的(de)工作原(yuan)理是:
1、電(dian)網信號經過電(dian)壓(ya)/電(dian)流(liu)互感器、信號調理電(dian)路(lu)轉變(bian)為符合(he)ADC輸(shu)入要求的小幅值電(dian)壓(ya)信號。
2、模數轉(zhuan)換(huan)模塊用于(yu)將小幅值電壓信號(hao)轉(zhuan)變為數字信號(hao),并將其傳送(song)至數據(ju)處理模塊。
3、數據處理(li)模(mo)塊以DSP作為運算核心,對(dui)ADC的采樣信號(hao)進行(xing)數據處理(li),從而計算得到電(dian)壓偏差、頻率偏差、諧波、三(san)相不平衡度(du)、電(dian)壓閃變等(deng)電(dian)能質量參數。
4、數據管理模(mo)塊用于對(dui)數據處(chu)理模(mo)塊計算得(de)到的各項電(dian)能(neng)質量參數進行(xing)數據管理,完成顯示、存(cun)儲以及通信(xin)等(deng)人機交(jiao)互功能(neng)。