【摘要】：準(zhǔn)確評估特高壓變電站內(nèi)噪聲水平需要合適的變壓器聲學(xué)模型。為此,在將變壓器看作面聲源的基礎(chǔ)上,通過點(diǎn)聲源與面聲源的等效代替,最終將變壓器等效為多個(gè)點(diǎn)聲源,建立了相應(yīng)的模型。該模型基于等效源法的思想,采用聲功率級表示各等效點(diǎn)聲源源強(qiáng),等效過程方便簡單,只需測量變壓器附近少量場點(diǎn)的聲壓級,避免了近場聲全息技術(shù)中的復(fù)雜計(jì)算。仿真計(jì)算結(jié)果顯示:將面聲源等效為多個(gè)點(diǎn)聲源后的重建聲場曲線與原平面聲源產(chǎn)生的聲場曲線基本一致。另外對1 000 kV變電站的仿真計(jì)算與實(shí)測數(shù)據(jù)的對比分析表明:結(jié)合提出的聲學(xué)模型與點(diǎn)聲源戶外傳播衰減,能較準(zhǔn)確地預(yù)測變電站內(nèi)任意點(diǎn)處噪聲值,誤差不超過1.5 dB。
[Abstract]:An appropriate transformer acoustic model is needed to accurately evaluate the noise level in UHV substations. Therefore, the transformer is regarded as a surface sound source, and the corresponding model is established by replacing the point sound source with the surface sound source. Finally, the transformer is equivalent to a number of point sound sources. Based on the idea of equivalent source method, the sound power level is used to express the sound source strength of each equivalent point, and the equivalent process is convenient and simple. It only needs to measure the sound pressure level of a small number of field points near the transformer, thus avoiding the complicated calculation in the near field acoustic holography technology. The simulation results show that the reconstructed sound field curve after the surface sound source is equivalent to multiple point sound sources is basically the same as that generated by the original plane sound source. In addition, the comparison between the simulation calculation and the measured data of 1 000 kV substation shows that the proposed acoustic model can accurately predict the noise value at any point in the substation, and the error is not more than 1.5 dB.
【作者單位】： 國家電網(wǎng)公司;武漢大學(xué)電氣工程學(xué)院;中國電力科學(xué)研究院;國網(wǎng)湖南省電力公司電力科學(xué)研究院;
【基金】：國家電網(wǎng)公司科技項(xiàng)目(GYW17201300115)~~
【分類號】：TM63;TM401.2

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本文編號：2195063