芒果视频

風電變流器行業簡介

一、風電變流器原理是什么

風(feng)(feng)電(dian)(dian)(dian)(dian)變(bian)(bian)(bian)(bian)流(liu)(liu)(liu)(liu)器(qi)(qi)(qi)(qi)由主電(dian)(dian)(dian)(dian)路系(xi)(xi)(xi)統(tong)、配電(dian)(dian)(dian)(dian)系(xi)(xi)(xi)統(tong)以及控制系(xi)(xi)(xi)統(tong)構成(cheng)，采用三(san)相(xiang)電(dian)(dian)(dian)(dian)壓(ya)型交-直(zhi)-交雙(shuang)向變(bian)(bian)(bian)(bian)流(liu)(liu)(liu)(liu)器(qi)(qi)(qi)(qi)技(ji)術，通過對(dui)雙(shuang)饋異步風(feng)(feng)力(li)發(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)的(de)(de)轉子(zi)進(jin)行(xing)勵磁(ci)，使得雙(shuang)饋發(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)的(de)(de)定子(zi)側(ce)(ce)輸(shu)出電(dian)(dian)(dian)(dian)壓(ya)的(de)(de)幅值、頻率和相(xiang)位與電(dian)(dian)(dian)(dian)網(wang)相(xiang)同，并(bing)且可根據需要進(jin)行(xing)有功(gong)和無(wu)功(gong)的(de)(de)獨立(li)解耦控制，具(ju)體的(de)(de)工作原理是(shi)：在直(zhi)驅型風(feng)(feng)力(li)發(fa)電(dian)(dian)(dian)(dian)系(xi)(xi)(xi)統(tong)中，全功(gong)率變(bian)(bian)(bian)(bian)流(liu)(liu)(liu)(liu)器(qi)(qi)(qi)(qi)是(shi)永磁(ci)同步發(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)與電(dian)(dian)(dian)(dian)網(wang)之(zhi)間的(de)(de)橋梁。永磁(ci)同步發(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)發(fa)出的(de)(de)交流(liu)(liu)(liu)(liu)電(dian)(dian)(dian)(dian)是(shi)隨著(zhu)風(feng)(feng)的(de)(de)變(bian)(bian)(bian)(bian)化而變(bian)(bian)(bian)(bian)化的(de)(de)，不能直(zhi)接接入電(dian)(dian)(dian)(dian)網(wang)。變(bian)(bian)(bian)(bian)流(liu)(liu)(liu)(liu)器(qi)(qi)(qi)(qi)的(de)(de)機(ji)(ji)側(ce)(ce)對(dui)幅值和頻率變(bian)(bian)(bian)(bian)化的(de)(de)交流(liu)(liu)(liu)(liu)進(jin)行(xing)PWM整流(liu)(liu)(liu)(liu)，整流(liu)(liu)(liu)(liu)后的(de)(de)直(zhi)流(liu)(liu)(liu)(liu)經變(bian)(bian)(bian)(bian)流(liu)(liu)(liu)(liu)器(qi)(qi)(qi)(qi)的(de)(de)網(wang)側(ce)(ce)進(jin)行(xing)PWM逆(ni)變(bian)(bian)(bian)(bian)，將直(zhi)流(liu)(liu)(liu)(liu)逆(ni)變(bian)(bian)(bian)(bian)成(cheng)幅值和頻率穩定的(de)(de)交流(liu)(liu)(liu)(liu)，經濾波器(qi)(qi)(qi)(qi)、升壓(ya)變(bian)(bian)(bian)(bian)壓(ya)器(qi)(qi)(qi)(qi)并(bing)入電(dian)(dian)(dian)(dian)網(wang)。

二、風電變流器的作用

風電機組利用風力發電，但自然界的風是不穩定的，速度有時大有時小，這種不穩定性決定了風機的轉速是變化的，從而發出的電也是不穩定的，而并網需要50Hz恒定頻率的交流電，為解決這個問題，需要一定的頻率變化手段去配合轉速變化，實現對風電頻率的變頻并轉化為電網交流頻率，這需要利用電力電子技術中的變頻器技術。因此，風電變流器就誕生了，它的作用主要是解決在風機轉速變化的情況下，如何保證發電恒頻輸出的問題。風電變流器根據風速大小適應發電機轉速，使風機實現最佳風能捕獲。它將風機在自然風作用下發出的電壓頻率、幅值不穩定的電能轉換為頻率、幅值穩定、符合電網要求的電能后并入電網。風電變流器在風力發電機組中是很重要的，如果您需要采購風電變流器，一定要選擇一個好的風電變流器品牌。

三、風電變流器和變頻器的區別

風電(dian)變(bian)(bian)(bian)流(liu)(liu)器(qi)(qi)(qi)(qi)和(he)(he)變(bian)(bian)(bian)頻(pin)器(qi)(qi)(qi)(qi)相(xiang)比(bi)(bi)，硬件基本(ben)相(xiang)同(tong)(tong)，主要(yao)區(qu)別在控制(zhi)算(suan)法和(he)(he)操縱目的(de)(de)，變(bian)(bian)(bian)流(liu)(liu)器(qi)(qi)(qi)(qi)改(gai)變(bian)(bian)(bian)的(de)(de)是電(dian)流(liu)(liu)（也有幾(ji)率(lv)對頻(pin)率(lv)進行更改(gai)），變(bian)(bian)(bian)頻(pin)器(qi)(qi)(qi)(qi)改(gai)變(bian)(bian)(bian)的(de)(de)是主要(yao)頻(pin)率(lv)。變(bian)(bian)(bian)流(liu)(liu)器(qi)(qi)(qi)(qi)和(he)(he)變(bian)(bian)(bian)頻(pin)器(qi)(qi)(qi)(qi)之(zhi)所以稱呼不(bu)同(tong)(tong)，主要(yao)在于它們伺服的(de)(de)對象(xiang)的(de)(de)特性(xing)不(bu)同(tong)(tong)。變(bian)(bian)(bian)流(liu)(liu)器(qi)(qi)(qi)(qi)伺服的(de)(de)對象(xiang)是雙饋發電(dian)機(ji)，變(bian)(bian)(bian)頻(pin)器(qi)(qi)(qi)(qi)主要(yao)是調節(jie)異步電(dian)動機(ji)。一般來說，風電(dian)變(bian)(bian)(bian)流(liu)(liu)器(qi)(qi)(qi)(qi)工作的(de)(de)環(huan)境溫度范圍要(yao)比(bi)(bi)普通的(de)(de)變(bian)(bian)(bian)頻(pin)器(qi)(qi)(qi)(qi)大些，可靠性(xing)也要(yao)高(gao)些，因(yin)為(wei)風力發電(dian)一般都是無人值守的(de)(de)24小(xiao)時運行，還要(yao)滿足大電(dian)流(liu)(liu)運行，因(yin)此要(yao)求較(jiao)高(gao)。

四、風電變流器一般分為哪幾種

風(feng)(feng)(feng)(feng)電(dian)(dian)(dian)(dian)(dian)變(bian)(bian)流(liu)(liu)(liu)(liu)(liu)器(qi)(qi)的(de)(de)(de)種類主要(yao)有兩種：1、雙(shuang)饋式(shi)風(feng)(feng)(feng)(feng)電(dian)(dian)(dian)(dian)(dian)變(bian)(bian)流(liu)(liu)(liu)(liu)(liu)器(qi)(qi)：雙(shuang)饋式(shi)變(bian)(bian)流(liu)(liu)(liu)(liu)(liu)器(qi)(qi)主要(yao)在風(feng)(feng)(feng)(feng)力發(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)系統中配套雙(shuang)饋發(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)使(shi)用(yong)，當風(feng)(feng)(feng)(feng)速(su)(su)變(bian)(bian)化導(dao)致發(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)轉速(su)(su)變(bian)(bian)化時，變(bian)(bian)流(liu)(liu)(liu)(liu)(liu)器(qi)(qi)通過控制發(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)轉子(zi)的(de)(de)(de)勵磁(ci)來改變(bian)(bian)轉子(zi)的(de)(de)(de)磁(ci)場，使(shi)發(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)的(de)(de)(de)輸(shu)出(chu)(chu)電(dian)(dian)(dian)(dian)(dian)壓、頻率(lv)、幅值和電(dian)(dian)(dian)(dian)(dian)網(wang)(wang)保持一致，從而(er)(er)實(shi)現(xian)風(feng)(feng)(feng)(feng)電(dian)(dian)(dian)(dian)(dian)系統的(de)(de)(de)變(bian)(bian)速(su)(su)恒(heng)頻發(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)。雙(shuang)饋型風(feng)(feng)(feng)(feng)機(ji)(ji)(ji)(ji)變(bian)(bian)流(liu)(liu)(liu)(liu)(liu)器(qi)(qi)的(de)(de)(de)作用(yong)就是為了生(sheng)成(cheng)這個(ge)頻率(lv)旋轉磁(ci)場而(er)(er)提供(gong)交變(bian)(bian)電(dian)(dian)(dian)(dian)(dian)流(liu)(liu)(liu)(liu)(liu)。在實(shi)際運轉過程啟(qi)動后，風(feng)(feng)(feng)(feng)機(ji)(ji)(ji)(ji)發(fa)(fa)(fa)(fa)出(chu)(chu)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)能將會通過變(bian)(bian)流(liu)(liu)(liu)(liu)(liu)器(qi)(qi)反饋給電(dian)(dian)(dian)(dian)(dian)網(wang)(wang)（約(yue)占風(feng)(feng)(feng)(feng)機(ji)(ji)(ji)(ji)總功(gong)率(lv)的(de)(de)(de)35~40%），此類型風(feng)(feng)(feng)(feng)機(ji)(ji)(ji)(ji)因之稱為雙(shuang)饋型風(feng)(feng)(feng)(feng)機(ji)(ji)(ji)(ji)。2、全(quan)(quan)功(gong)率(lv)式(shi)風(feng)(feng)(feng)(feng)電(dian)(dian)(dian)(dian)(dian)變(bian)(bian)流(liu)(liu)(liu)(liu)(liu)器(qi)(qi)：全(quan)(quan)功(gong)率(lv)式(shi)的(de)(de)(de)風(feng)(feng)(feng)(feng)電(dian)(dian)(dian)(dian)(dian)變(bian)(bian)流(liu)(liu)(liu)(liu)(liu)器(qi)(qi)主要(yao)配套直驅(qu)/半直驅(qu)發(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)以及異步(bu)發(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)使(shi)用(yong)，由(you)機(ji)(ji)(ji)(ji)側變(bian)(bian)換器(qi)(qi)和網(wang)(wang)側變(bian)(bian)換器(qi)(qi)組成(cheng)，兩者(zhe)通過直流(liu)(liu)(liu)(liu)(liu)母(mu)線連接，機(ji)(ji)(ji)(ji)側變(bian)(bian)換器(qi)(qi)實(shi)現(xian)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)的(de)(de)(de)變(bian)(bian)頻調速(su)(su)，獲得最佳的(de)(de)(de)發(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)效率(lv)，而(er)(er)網(wang)(wang)側變(bian)(bian)換器(qi)(qi)接入電(dian)(dian)(dian)(dian)(dian)網(wang)(wang)，提供(gong)優質的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)能輸(shu)出(chu)(chu)。這種風(feng)(feng)(feng)(feng)電(dian)(dian)(dian)(dian)(dian)變(bian)(bian)流(liu)(liu)(liu)(liu)(liu)器(qi)(qi)因發(fa)(fa)(fa)(fa)電(dian)(dian)(dian)(dian)(dian)機(ji)(ji)(ji)(ji)的(de)(de)(de)全(quan)(quan)部電(dian)(dian)(dian)(dian)(dian)能都(dou)通過變(bian)(bian)流(liu)(liu)(liu)(liu)(liu)器(qi)(qi)傳輸(shu)到電(dian)(dian)(dian)(dian)(dian)網(wang)(wang)側，因此稱為全(quan)(quan)功(gong)率(lv)式(shi)風(feng)(feng)(feng)(feng)電(dian)(dian)(dian)(dian)(dian)變(bian)(bian)流(liu)(liu)(liu)(liu)(liu)器(qi)(qi)。