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    貝殼電氣產品專欄五--抽油機專用控制器
    來源: | 作者:id1401203 | 發布時間: 2018-05-23 | 2030 次瀏覽 | 分享到:

     


           目前我國各大油田中,抽油機舉升是主要的采油方式。在我國許多采油單位,采油系統耗電量占全廠電量的1/3左右,在噸油成本中,電費支出約占生產成本的1/6以上,游梁式抽油機存在著起動沖擊大、運行耗電多、效率低下等 缺點。同時,油井情況也較復雜,時常出現稠油、結蠟、沙卡現象。

          抽油系統中還存在一些影響節能的因素:1、采用工頻硬起動,對抽油機設備的沖擊較大,將直接導致抽油桿等部件壽命的降低。2、沖次調節不便,難以保證抽油機隨時工作在最佳的工作狀態。3、常規型抽油機載荷波動系數(CLF )和懸點加速度較大,配套電機功率大,平衡效果差,即使在平衡效果較好的情況下,減速箱峰值扭矩仍較大,負扭矩現象也很嚴重,導致電機進入再生發電狀態。將多余能量反饋到電網,引起主回路母線電壓升高,勢必會對整個電網產生沖擊,導致電網供電質量低,功率因數低,使常規型抽油機效率低下且能耗較高。4、常規型抽油機由于其幾何尺寸和啟動力矩需求,配套電機功率大,而運行時均值功率卻小。 常規抽油機運動特性決定了電機長期在低效區運行使得電機電能利用率較差,從而造成了較低的功率因數和電能的浪費。如何提高采油系統的效率,達到節能的目的,是我們首要解決的問題。


         

          貝殼電氣研發團隊根據油田抽油機的生產工藝設計的油田磕頭機節能控制裝置BKMD目前已廣泛應用于中國各大油田,此節能裝置使抽油田機實現了軟起動、軟停車和調速運行過程控制。其產品具有起動電流小、速度平穩、性能可靠、對電網沖擊小等優點,還可實現上下沖次速度任意調節和閉環控制運行。用戶可根據油井的液位、壓力確定抽油機的沖次、速度和產液量,從而降耗節能、提高泵效,使設備減少磨損,延長使用壽命。



    電源條件: 380V,士15%; 660V, 士15%,45~60Hz,三相

    功率因數:0.9~0.96


    ◆ 變頻部分           


    轉            矩:自動提升

    最  大  轉 矩: 200%/1HZ

    輸  出  頻 率: 20~60Hz上下沖程單獨可調,上下沖程自動檢測識別技術

               CPU :32位軍品,DSP( -40%C~+90C )變

    加 減 速步 長:0.004Hz (精度萬分之一),有電壓紋波自動補償功能  

    載             波:6kHz分  

    死             區:動態補償

    給  定  濾   波: 24位動態濾波內部時鐘鎖相環

     制  方   法:基于抽油機特性的矢量控制方式

    風扇控制方式:溫度自動控制方式


    ◆ 回饋部分


    控制方式:雙向同步PWM方式

    運      算:平均電壓方式

    響應時間:1ms

    載      波:16kHz
    回饋方式:正弦波PWM部
    電流畸變:<5% (符合國家標準)
    回饋功率因數:0.98
    內置輸出濾波電抗器及電容濾波器

    ◆ 保護功能

    過流、過壓、過載、過熱、短路、接地故障、電網異常等。
    自動故障再啟動時間: 15秒


    ◆ 使用環境


    不可淋雨和直接日曬及結露

    溫度:-10℃~+50℃



    》提高效率,保證生產
     
       1、配合井下狀態,改變沖次,從而改變抽油的效率;
       2、具有備用工頻旁路系統,根據需要可轉工頻旁路運行,以保障正常生產;
      
    》故障保護,安全可靠
     
       1、柔性啟動,把電機啟動電流降低3-4倍,保護了電機和機械設備;
       2、可實現過壓、過流、欠壓、過載、短路等保護功能,確保電機穩定運行;最大力矩得到限制,斷托的可能性大大減小;
       3、可降低抽油機全系統的運行速度,以減輕傳動、運動部分的疲勞和磨損(如油桿、皮帶等),完全故障保護;
     
    》遠程遙控,集中監控
     
       1、可遙控抽油速度,不必更換機械設備;
       2、可方便實現遠程集中監控,便于檢測設備運行狀況內置能量回饋裝置,比通用變頻多節省10-20%電能;
      
    》專業化的結構,野外使用可靠性更高
     
       1、獨特的設計結構,變頻主機做了防腐處理,具有防潮、防鹽霧功能及運行溫度在-I0C~55C之間,提高抽油機運行的可靠性; 


     









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