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  • 今天是2019年3月19日 星期二,歡迎光臨本站 安徽佑賽科技股份有限公司 網址: www.ls0834t.com

    諧波治理

    滄州榮盛

    文字:[大][中][小] 2015-7-14    瀏覽次數:3495    

    UAPF在商業地產行業的應用

     

    滄州榮盛 

     基本情況介紹

    隨著電力電子技術的迅猛發展,大功率可關斷器件得到了廣泛應用,諧波源已經不單產生于工業設備中。在商業地產以及公共民用建筑中例如開關電源、變頻器、UPS、可控硅調光設備、LED廣告牌、空調等非線性負荷的使用,將產生大量的3、5、7、11次諧波,使得電網電壓、電流產生畸變,這種“污染”會對電力安全和設備造成嚴重的危害,因此需要諧波治理。  

    滄州榮盛國際購物廣場是集寫字樓、 公寓、超市、百貨、影院等為一體的商業綜合體,主要含有UPS、LED燈、廣告照明燈、變頻空調、禮堂舞臺可控硅調光燈等非線性負載,因此在設計的時候已經考慮到使用有源電力濾波器進行改善電能的質量。其中商業1#-2變壓器使用了一套200A的有源電力濾波器進諧波治理。安徽佑賽科技有限公司技術人員通過在現場對使用有源電力濾波器治理前后的測量,并對測試數據進行分析,治理起到了較好的效果。

     測量數據匯總 

    通過在現場對負荷進行測試,滄州榮盛國際購物廣場在使用有源電力濾波器進行諧波治理前后A、B、C三相電電流測量結果整體情況匯總如下如表2-1所示。

    表二-1 補償前后測量數據匯總

    測量

    治理前

    治理后

    A

    B

    C

    N

    A

    B

    C

    N

    電流有效值(A

    576.2

    571.3

    574.3

    243.1

    537.6

    540.2

    541.7

    232

    THDi(%)

    21.9%

    24.5%

    24.4%


    4.3%

    4.5%

    4.4%


    3次諧波

    12.7%

    14.4%

    14.7%


    1.8%

    1.8%

    1.8%


    5次諧波

    15.6%

    17.5%

    17.8%


    2.4%

    2.5%

    2.5%


    7次諧波

    6.9%

    7.2%

    7.5%


    1.5%

    1.6%

    1.6%


     

     治理前后對比

    使用電能質量分析儀(CA8835)對變壓器總進線柜進行了測試,由圖中可以直觀的看出,補償后系統電流有效值得到了降低,且電流畸變率以及各次諧波含量大大降低。UAPF的輸出電流成分與負荷電流的諧波成分基本相同,很好的實現了濾波功能。

       

      治理解決方案

    滄州榮盛國際購物廣場是新建設的項目,根據設計院設計的商業1#-2變壓器所帶負荷可知,此變壓器下主要負荷是照明、熒光燈、LED以及變頻空調等,系統以3、5、7次諧波為主,其中3次諧波電流利用零線形成回路,以零線電流的形式表現出來。我公司電氣工程師根據各個負載的畸變率范圍以及諧波估算軟件計算出商業1#-2變電所800KVA的變壓器選用200A的有源電力濾波器,同時變壓器下帶有大量的單相負荷需選用四橋臂的APF ,對應型號為UAPF-L4200-0.4

     其它典型案例

    關于UAPF在商業地產行業的應用,同類案例包括:蕪湖僑鴻國際、萬達廣場、南京太陽宮等。

     

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