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靜止式進相器在電機無功就地補償中的應用

2019-09-26

  靜止式進相器是這種(zhong)運用變頻器(qi)原理的任意無功(gong)就地賠償(chang)設備。它接雙于溝通(tong)交流纏線式異步電(dian)機(ji)的電(dian)機(ji)轉子控制回路,用于提升電(dian)機(ji)的功(gong)率因素,充分發揮目前(qian)供電(dian)設備的供電(dian)系統發展(zhan)潛力,減少電(dian)力工程耗損,進而超(chao)過環(huan)保節能實(shi)際(ji)效果,提升公司(si)的經濟(ji)收(shou)益。

  現(xian)階(jie)段,世界各(ge)國溝(gou)通(tong)(tong)交流(liu)纏線(xian)式(shi)(shi)異(yi)步(bu)電(dian)(dian)(dian)機無(wu)(wu)功功率補(bu)(bu)償方法關鍵有兩種:A,電(dian)(dian)(dian)機定子側并(bing)聯(lian)電(dian)(dian)(dian)容器;B ·發(fa)電(dian)(dian)(dian)機轉子控制回路接雙(shuang)轉盤(pan)式(shi)(shi)進(jin)(jin)相設備(bei)(bei)。并(bing)聯(lian)電(dian)(dian)(dian)容器只(zhi)有賠償路線(xian)無(wu)(wu)功功率,不(bu)可以(yi)減(jian)少(shao)電(dian)(dian)(dian)機定子電(dian)(dian)(dian)流(liu)量;特別是(shi)在(zai)是(shi)高壓電(dian)(dian)(dian)容器的(de)按置(zhi)場地、操縱方法常(chang)(chang)有要(yao)(yao)求,其項目(mu)投資通(tong)(tong)常(chang)(chang)高過通(tong)(tong)常(chang)(chang)進(jin)(jin)相設備(bei)(bei)。原來的(de)轉盤(pan)式(shi)(shi)進(jin)(jin)相設備(bei)(bei)是(shi)這種整流(liu)子轉動電(dian)(dian)(dian)動機,非常(chang)(chang)怕(pa)浮塵(chen),應用(yong)周期(qi)短,且規格型(xing)號少(shao),無(wu)(wu)法與異(yi)步(bu)電(dian)(dian)(dian)機提高配對(dui)。靜(jing)止不(bu)動式(shi)(shi)進(jin)(jin)相器是(shi)在(zai)所述(shu)兩種無(wu)(wu)功補(bu)(bu)償裝(zhuang)置(zhi)的(de)基(ji)本上發(fa)展趨勢起來的(de)這種新式(shi)(shi)環(huan)保(bao)(bao)節能設備(bei)(bei)。它選用(yong)了AC一AC變頻(pin)器原理,具(ju)備(bei)(bei)主(zhu)要(yao)(yao)參數(shu)調(diao)整非常(chang)(chang)容易,不(bu)害怕(pa)浮塵(chen),使用(yong)期(qi)長(chang),維護(hu)保(bao)(bao)養便捷等(deng)特性,能適用(yong)各(ge)種機械設備(bei)(bei)負(fu)荷。 2原理

  靜止式進相器主控(kong)(kong)(kong)制回(hui)(hui)(hui)路(lu)(lu)操(cao)縱電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)原(yuan)理圖見圖一 它將單(dan)相(xiang)電(dian)(dian)(dian)(dian)(dian)380v交流電(dian)(dian)(dian)(dian)(dian)流,根據12只可(ke)控(kong)(kong)(kong)硅和6 只均衡(heng)電(dian)(dian)(dian)(dian)(dian)抗器(qi),轉(zhuan)換成與發電(dian)(dian)(dian)(dian)(dian)機轉(zhuan)子(zi)頻(pin)率同樣(yang)(fi · s~IHZ)的(de)(de)三相(xiang)電(dian)(dian)(dian)(dian)(dian)路(lu)(lu)。該電(dian)(dian)(dian)(dian)(dian)商品流通人電(dian)(dian)(dian)(dian)(dian)機轉(zhuan)子(zi)控(kong)(kong)(kong)制回(hui)(hui)(hui)路(lu)(lu),進而在電(dian)(dian)(dian)(dian)(dian)機轉(zhuan)子(zi)控(kong)(kong)(kong)制回(hui)(hui)(hui)路(lu)(lu)中(zhong)造成1個超前的(de)(de)于電(dian)(dian)(dian)(dian)(dian)機轉(zhuan)子(zi)電(dian)(dian)(dian)(dian)(dian)勢差(cha)近90。電(dian)(dian)(dian)(dian)(dian)角(jiao)(jiao)的(de)(de)額外電(dian)(dian)(dian)(dian)(dian)勢差(cha),從而改進電(dian)(dian)(dian)(dian)(dian)動機的(de)(de)功率因素(su)。EK的(de)(de)尺寸(cun)在于軟啟動器(qi)開關電(dian)(dian)(dian)(dian)(dian)源 U2的(de)(de)尺寸(cun)和可(ke)控(kong)(kong)(kong)硅開啟角(jiao)(jiao)的(de)(de)尺寸(cun)。

  從系統(tong)框圖看,取樣數據(ju)(ju)(ju)(ju)信(xin)號(hao)控(kong)制(zhi)回路(lu)依據(ju)(ju)(ju)(ju)發(fa)電(dian)機轉子(zi)電(dian)流(liu)量數據(ju)(ju)(ju)(ju)信(xin)號(hao)和額(e)外(wai)電(dian)勢(shi)差數據(ju)(ju)(ju)(ju)信(xin)號(hao)開(kai)展解決,把(ba)結果(guo)贈給邏輯性(xing)辨(bian)別控(kong)制(zhi)回路(lu);邏輯性(xing)辨(bian)別控(kong)制(zhi)回路(lu)依據(ju)(ju)(ju)(ju)維護命令(ling)操縱(zong)觸(chu)發(fa)器,開(kai)啟可控(kong)硅的開(kai)啟角,進而在電(dian)機轉子(zi)控(kong)制(zhi)回路(lu)獲得1個額(e)外(wai)勵磁(ci)電(dian)流(liu)電(dian)流(liu)量I '。。以便維持Il + 12:I。不(bu)(bu)會(hui)改(gai)變,12提升(sheng), h還要(yao)降低(di);因此(ci)減(jian)少電(dian)機定子(zi)電(dian)流(liu)量,減(jian)少功率因數角,提升(sheng)功率因素(su)COSVI。見圖三,因為維持勵磁(ci)電(dian)流(liu)1。、轉差率不(bu)(bu)會(hui)改(gai)變,從而確保電(dian)動機負荷率與(yu)轉速比(bi)不(bu)(bu)會(hui)改(gai)變。 2 · 2賠(pei)償特點

隨之賠償(chang)工作電(dian)(dian)壓的逐漸上(shang)升(sheng)(sheng)(sheng),電(dian)(dian)機定子側的無(wu)功(gong)功(gong)率(lv)慢(man)(man)慢(man)(man)降低,功(gong)率(lv)因素(su)(su)逐漸升(sheng)(sheng)(sheng)高,電(dian)(dian)機定子電(dian)(dian)流量慢(man)(man)慢(man)(man)減少。當賠償(chang)工作電(dian)(dian)壓上(shang)升(sheng)(sheng)(sheng)到必(bi)須值后,電(dian)(dian)機定子側的無(wu)功(gong)功(gong)率(lv)減少到接趨向于(yu),功(gong)率(lv)因素(su)(su)升(sheng)(sheng)(sheng)高到近似于(yu)1。



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