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諧波治理

中原油田

文字:[大][中][小] 2015-7-14    瀏覽次數:1963    

UAPF在油田石化行業的應用

中原油田

 基本情況介紹

油田行業是集油氣勘探、生產、集輸、儲運等生產型企業。它具有生產工藝連續性強,自動化程度高,裝置之間關聯程度復雜的生產特點,故對供電安全性、可靠性要求非常高。

油田在生產過程中廣泛采用了基于電力電子技術的變頻器、整流器等多種電網污染設備,這些設備將產生的大量諧波“污染”注入到電網中,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,為整個油田的生產運行帶來安全隱患,因此需要諧波治理。                                           

中原油田采油三廠衛36#站2號泵110KW電機是由變頻器帶動的,變頻器在運行過程中是自動調整頻率的,給電網注入了大量的諧波,需要進行諧波治理。2012年5月12日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,使用有源電力濾波器進行諧波治理前后的A、B、C三相電壓電流測量結果整體情況匯總如下表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

A

B

C

電壓有效值(V

237

236

231

232.5

231.5

231.4

電流有效值(A

99.2

112.2

114

59

66.5

68.5

THDu(%)

10.36%

10.59%

9.79%

1.9%

2.5%

3%

THDi(%)

65.2%

48.5%

54.5%

6.6%

5.2%

5.6%

有功功率(kw

18.4

17.2

16.7

21.5

23.7

17.7

無功功率(kVar

12.7

12.7

13

3

3.2

4.7

視在功率(kVA

21

22.7

22.2

20.7

22.7

17

功率因數

0.85

0.887

0.883

0.990

1.0

0.977

  治理前后對比

黃色是電壓波形,藍色是電流波形,對APF投入運行前后的系統狀態進行錄波,由圖中可以直觀的看出,補償后電壓電流接近完美正弦波,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

在進行諧波治理前,我公司售前工程師前往河南中原油田衛36#站現場進行了負荷的測試和了解,主要諧波源是一臺132KW的變頻器帶110KW的電機運行,根據測試結果進行分析,此臺變頻器的電流在90-120A之間變化,諧波畸變率在40%-60%之間變化,變頻器滿負載運行時畸變率在35%左右。

變頻器負荷變化快的工作特性決定了,傳統無源濾波設備無法解決其諧波問題,只能使用有源電力濾波器進行諧波治理。為了更好的濾除系統中的諧波,在變頻器的進線端安裝1只0.059mh的進線電抗器后,再使用1套100A的有源電力濾波器進行治理。

 其它典型案例

關于UAPF在油田化工行業的應用,同類案例包括:大慶油田、長慶油田、安徽司爾特化肥等。

 

 


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