本文選題：電力變壓器噪聲　切入點(diǎn)：有源降噪系統(tǒng)　出處：《高電壓技術(shù)》2016年07期

【摘要】：為了有效抑制電力變壓器產(chǎn)生的高分貝低頻噪聲,針對(duì)變壓器有源降噪系統(tǒng)開(kāi)展了相關(guān)研究。結(jié)合實(shí)驗(yàn)條件,在分析變壓器噪聲時(shí)域及頻域特點(diǎn)的基礎(chǔ)上,合理選擇了有源降噪系統(tǒng)類(lèi)型。通過(guò)仿真和理論分析了收斂系數(shù)、濾波階數(shù)以及系統(tǒng)采樣頻率對(duì)有源降噪系統(tǒng)采用的LMS自適應(yīng)濾波算法收斂性、穩(wěn)定性以及降噪效果的影響。搭建了變壓器噪聲在線監(jiān)測(cè)及有源降噪軟件控制平臺(tái),并針對(duì)變壓器噪聲特點(diǎn)合理選擇了硬件系統(tǒng)設(shè)備。結(jié)果表明,在變壓器噪聲有源降噪實(shí)驗(yàn)中,噪聲低頻區(qū)域降噪效果顯著,在誤差傳聲器處取得了5~10 d B的降噪效果,平均聲能量密度下降了68.38%~90%,驗(yàn)證了LMS算法的有效降噪性,以及所構(gòu)建的有源降噪系統(tǒng)對(duì)變壓器噪聲在線監(jiān)測(cè)與抑制的可靠性。
[Abstract]:In order to effectively suppress the high decibels low frequency noise produced by power transformer, the related research is carried out for the transformer active noise reduction system. Based on the experimental conditions, the characteristics of transformer noise in time domain and frequency domain are analyzed. The type of active noise reduction system is reasonably selected. The convergence of LMS adaptive filtering algorithm for active noise reduction system is analyzed by means of simulation and theory, including convergence coefficient, filter order and system sampling frequency. The software platform for on-line monitoring of transformer noise and active noise reduction software is built, and the hardware system equipment is reasonably selected according to the characteristics of transformer noise. The results show that, In the experiment of active noise reduction of transformer noise, the noise reduction effect in the low frequency region of noise is remarkable. The noise reduction effect of 510dB is obtained at the error microphone, and the average acoustic energy density is reduced by 68.3890%, which verifies the effective noise reduction of LMS algorithm. And the reliability of the active noise reduction system for on-line monitoring and suppression of transformer noise.
【作者單位】： 山東大學(xué)電氣工程學(xué)院;山東省特高壓輸變電技術(shù)與裝備重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金(51207084) 山東省優(yōu)秀中青年科學(xué)家科研獎(jiǎng)勵(lì)基金(BS2013NJ024)~~
【分類(lèi)號(hào)】：TM41

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本文編號(hào)：1678376