Suzhou Electric Appliance Research Institute
期刊號(hào): CN32-1800/TM| ISSN1007-3175

Article retrieval

文章檢索

首頁(yè) >> 文章檢索 >> 文章瀏覽排名

局部放電信號(hào)處理相關(guān)方法的研究

來(lái)源:電工電氣發(fā)布時(shí)間:2016-04-06 15:06 瀏覽次數(shù):17

局部放電信號(hào)處理相關(guān)方法的研究 

楊凱 
東南大學(xué) 電氣工程學(xué)院,江蘇 南京 210096 
 

摘 要:分析了FFT閾值濾波和基于能量比預(yù)處理的FFT閾值濾波法,分別采用這兩種方法對(duì)實(shí)際監(jiān)測(cè)信號(hào)進(jìn)行處理,并對(duì)比分析了兩種信號(hào)處理結(jié)果。結(jié)果表明,F(xiàn)FT閾值濾波法采用不同的濾波系數(shù)時(shí),信號(hào)處理結(jié)果會(huì)呈現(xiàn)很大的差異;基于能量比預(yù)處理法能找到能量突變的點(diǎn),信號(hào)處理更具針對(duì)性,但采用能量比預(yù)處理閾值濾波過(guò)程中應(yīng)當(dāng)注意選取合適的窗口長(zhǎng)度,且在信號(hào)處理的時(shí)候應(yīng)當(dāng)盡可能地減少局部放電信號(hào)能量的損失。
關(guān)鍵詞:局部放電;FFT濾波;閾值;能量比預(yù)處理
中圖分類號(hào):TM855 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):1007-3175(2014)12-0014-04


Study Method of Signal Processing in Partial Discharge 

YANG Kai 
School of Electrical Engineering, Southeast University, Nanjing 210096, China 
 

Abstract: Analysis was made on the fast Fourier transform (FFT) filtering method using threshold value and the FFT filtering method based on energy-ratio pretreatment. These two methods were adopted to carry out treatment for actually monitor signals, and comparison and analysis were made on two kinds of signal treatment results. The result shows that when the FFT threshold value filtering method adopts different filtering coefficient, the signal processing results will show great difference. The filtering method based on energy-ratio pretreatment can find the point where energy suddenly changes, the signal treatment is more pertinent, but in the energy-ratio pretreatment value filtering process, appropriate window length should be adopted, and loss of partial discharge should be reduced in signal treatment.
          Key words: partial discharge; fast Fourier transform filtering; threshold; energy-ratio pretreatment


參考文獻(xiàn)
[1] 李茂軍,劉建明.變壓器局放信號(hào)檢測(cè)中白噪聲和周期性干擾的抑制[J].長(zhǎng)沙理工大學(xué)學(xué)報(bào):自然科學(xué)版,2007,4(2):45-48.
[2] 宋登峰.高壓開(kāi)關(guān)柜局部放電監(jiān)測(cè)系統(tǒng)的超高頻傳感器設(shè)計(jì)[D].焦作:河南理工大學(xué),2011.
[3] 唐炬,黃江岸,張曉星,等.局部放電在線監(jiān)測(cè)中混頻周期性窄帶干擾的抑制[J].中國(guó)電機(jī)工程學(xué)報(bào),2010,30(13):121-127.
[4] 王曉蓉,楊敏中,嚴(yán)璋.電力設(shè)備局部放電測(cè)量中抗干擾研究的現(xiàn)狀和展望[J].電網(wǎng)技術(shù),2000,24(6):41-45.
[5] Ma X, Zhou C, Kemp I J.Automatic wavelet analysis and its application in partial discharge detection[J].IEEE Electrical Magazine,2002,18(2):37-47.
[6] 歐陽(yáng)明鑒.小波變換在局部放電聲信號(hào)提取中的應(yīng)用[D].天津:天津大學(xué),2005.
[7] 謝顏斌.用復(fù)小波變換抑制局部放電信號(hào)中白噪聲的研究[D].重慶:重慶大學(xué),2006.
[8] 彭莉.復(fù)小波變換抑制局部放電白噪聲干擾[D].重慶:重慶大學(xué),2007.
[9] 李天云,程思勇,楊梅,等.FFT與小波分析應(yīng)用于抑制局部放電窄帶干擾[J].高電壓技術(shù),2007,33(12):71-75.
[10] 肖燕.GIS局部放電在線監(jiān)測(cè)和故障診斷技術(shù)的研究[D].上海:上海交通大學(xué),2006.
[11] 謝良聘,朱德恒.FFT頻域分析算法抑制窄帶干擾的研究[J].高電壓技術(shù),2000,26(4):6-8.
[12] 盧毅,韓志琨,陳瑜.基于能量比預(yù)處理的FFT窄帶濾波方法[J].東南大學(xué)學(xué)報(bào):自然科學(xué)版,2010,40(5):948-951.
[13] 左國(guó)平,王彥春,隋榮亮.利用能量比法拾取地震初至的一種改進(jìn)方法[J].石油物探,2004,43(4):345-347.