發(fā)布時(shí)間：2018-01-23 21:00

  本文關(guān)鍵詞： 電能質(zhì)量 降噪 小波分析　出處：《實(shí)驗(yàn)技術(shù)與管理》2017年06期 　論文類型：期刊論文

【摘要】：基于小波信號(hào)的變換原理,增加小波重構(gòu),提高電信號(hào)的精確度,同時(shí)增加反饋環(huán)節(jié)。先對電信號(hào)進(jìn)行小波分解,查看是否有較多的暫態(tài)突變,假如有較多的暫態(tài)突變,或者電力系統(tǒng)部件有什么故障,可獲得實(shí)時(shí)修正,使最后得到的降噪后信號(hào)更加精確。將重構(gòu)的信號(hào)與真實(shí)信號(hào)相減,得出降噪方式處理后的實(shí)驗(yàn)結(jié)果發(fā)現(xiàn):強(qiáng)制降噪范圍比默認(rèn)閾值降噪與給定閾值降噪大6~8倍,降噪后的信號(hào)與原信號(hào)相比差別太大,說明把較多有用信號(hào)去除了,這就違背了降噪的初衷,強(qiáng)制降噪后的信號(hào)精度不夠。在實(shí)際工程應(yīng)用中,可以根據(jù)情況選擇給定閾值降噪方式以及默認(rèn)閾值降噪方式。
[Abstract]:Based on the principle of wavelet signal transformation, the wavelet reconstruction is added to improve the accuracy of electrical signal and the feedback link is increased. Firstly, wavelet decomposition of the signal is carried out to see if there are more transient mutations. If there are more transient mutations or any faults in power system components, real-time correction can be obtained to make the final noise reduction signal more accurate and subtract the reconstructed signal from the real signal. The experimental results show that the range of forced noise reduction is 6 ~ 8 times larger than that of the default threshold and the given threshold, and the signal after denoising is much different from the original signal. It shows that more useful signals are removed, which is contrary to the original intention of noise reduction, and the signal precision after forced noise reduction is not enough. According to the situation, the given threshold denoising method and the default threshold denoising method can be selected.
【作者單位】： 廣東技術(shù)師范學(xué)院自動(dòng)化學(xué)院;廣東工業(yè)大學(xué)實(shí)驗(yàn)教學(xué)部;
【基金】：廣東省自然科學(xué)基金項(xiàng)目“超導(dǎo)限流器與電力系統(tǒng)繼電保護(hù)配合的研究”(S2013010015007)
【分類號(hào)】：TM711;TN911.7
【正文快照】： 隨著大功率電力電子裝置的普及應(yīng)用,電力系統(tǒng)中電能質(zhì)量問題越加凸顯[1-3]。要凈化電力環(huán)境,解決電能質(zhì)量問題,就需要準(zhǔn)確直觀地檢測出各類反映電能質(zhì)量問題的技術(shù)數(shù)據(jù),但這類技術(shù)數(shù)據(jù)受電磁干擾或檢測傳感器非線性的影響,往往含有大量的噪聲信號(hào)[4-8]。去除電能信號(hào)中的噪聲

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相關(guān)期刊論文 前10條

1 陳警眾;電能質(zhì)量講座 第四講 電能質(zhì)量改善措施的實(shí)際應(yīng)用[J];供用電;2001年01期

2 ;教育部電能質(zhì)量工程研究中心[J];安徽科技;2002年03期

3 奚s，

本文編號(hào)：1458221