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MS4800S-30-1240-30X-30R
MS4800S-30-1240-30X-30R 價(jià)格:100  元(人民幣) 產(chǎn)地:美國(guó)
最少起訂量:1個(gè) 發(fā)貨地:福建廈門(mén)
上架時(shí)間:2018-09-13 17:15:15 瀏覽量:74
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MS4800S-30-1240-30X-30R

MS4800S-30-1240-30X-30R

MS4800S-30-1240-30X-30R

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發(fā)電量限制值由用戶(hù)直接在上位機(jī)上設(shè)定。開(kāi)環(huán)狀態(tài)時(shí),發(fā)電量限制由變頻器輸入功率直接進(jìn)行判斷。當(dāng)變頻器輸入功率絕對(duì)值達(dá)到發(fā)電量限制值時(shí),則將給定信號(hào)進(jìn)行限制
。閉環(huán)狀態(tài)時(shí),給定值為進(jìn)線(xiàn)功率目標(biāo)值,反饋值為實(shí)際進(jìn)線(xiàn)功率。此時(shí)的發(fā)電功率限制值,同樣與變頻器輸入功率進(jìn)行比較,變頻器輸入功率的絕對(duì)值達(dá)到發(fā)電功率限制值后,需要對(duì)進(jìn)線(xiàn)功率目標(biāo)值進(jìn)行修正。

例如:進(jìn)線(xiàn)功率目標(biāo)值=500kW;當(dāng)前變電所實(shí)際進(jìn)線(xiàn)功率=1000kW;發(fā)電功率限制值為300kW。當(dāng)變頻器輸入功率達(dá)到-300kW時(shí),進(jìn)線(xiàn)功率目標(biāo)值將自動(dòng)調(diào)整至700kW。

2.4其它功能

(1)開(kāi)環(huán)、閉環(huán)狀態(tài)自由平滑切換

閉環(huán)運(yùn)行狀態(tài)下,如果遇到通訊故障,則自動(dòng)切換到開(kāi)環(huán)運(yùn)行狀態(tài),等通訊恢復(fù)后,在用戶(hù)DCS監(jiān)控界面可以直接切換至閉環(huán)狀態(tài)。正常運(yùn)行情況下,用戶(hù)也可以在DCS監(jiān)控界面對(duì)控制狀態(tài)進(jìn)行隨意切換。

(2)斜坡停車(chē)功能

斜坡停車(chē)狀態(tài)下,系統(tǒng)發(fā)電量將以斜坡形式緩慢降落,以防止汽輪機(jī)轉(zhuǎn)速波動(dòng)。若斜坡停車(chē)期間再次按下運(yùn)行按鈕,則系統(tǒng)重新開(kāi)始運(yùn)行。

2.5轉(zhuǎn)速啟動(dòng)


轉(zhuǎn)速啟動(dòng)又為:“飛車(chē)啟動(dòng)”,即在電機(jī)旋轉(zhuǎn)狀態(tài)下啟動(dòng)。變頻器轉(zhuǎn)速啟動(dòng)存在于轉(zhuǎn)速啟動(dòng)與轉(zhuǎn)矩控制啟動(dòng)兩種方式中。在啟動(dòng)變頻器前控制器一直檢測(cè)電機(jī)的轉(zhuǎn)速,一旦接到啟動(dòng)命令,變頻器立即輸出該轉(zhuǎn)速下對(duì)應(yīng)的頻率,并在此頻率基礎(chǔ)上加減轉(zhuǎn)速或者加減轉(zhuǎn)矩,直到達(dá)到給定數(shù)值。

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