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係統的運轉頻率的調節採用開環手動調節方式。考慮到輸油係統要求平穩運行的特點,本係統不宜採用閉環調節控制。因為受整個輸油係統管網波動的影響,如採用閉環控制,很容易造成係統的自動停機,或者引起整個輸油係統的擾動,給輸油生產的調度指揮帶來不利的影響。而採用開環人為控制,通過運行時間的技術摸索,在不同工況下,人為地設定和調整變頻係統的參數,即可減少部分初期投資,又可保障輸油係統的平穩運行。
現場設置、啟動、停止以及緊急停機按鈕,控制室內設上位機對運行參數進行實行顯示,地方便了現場操作人員的操作和對設備運行狀太的監視。
優化係統的保護參數,確保輸油係統的連續平穩運行。在應用於輸油係統時慎重選擇,並對一些保護的參數按實際需要進行設置。避免由於變頻係統的保護過於靈敏而而造成輸油泵停機,影響輸油係統的平穩運行。
在變頻調速係統內設置適合於現場實際的報警功能,並對運行的參數,操作情況,故障情況具有詳細的記錄功能。
五、應用效果
南一油庫2#輸油泵機組變頻調速係統於2003年4月18號正式投運成功,經過兩個月的試運行,取得了明顯的節能效果,對於在單泵運行,雙泵並聯運行、三泵並聯運行等不同的工況下
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