摘 要：研究了基于IEC 61400-11測量標準，確保風(fēng)力發(fā)電機組聲學(xué)噪聲評估過程準確、可重復(fù)的聲學(xué)測試分析方法，如風(fēng)速的測量與轉(zhuǎn)換、1/3倍頻程分析的背景噪聲修正、整風(fēng)速下的聲壓級等；推導(dǎo)了適用于工程實踐的由聲壓級估算聲功率級的計算公式；并詳細分析了基于窄帶譜與心理聲學(xué)的音調(diào)及能聽度的計算過程。對基于上述原理所開發(fā)的測量評估系統(tǒng)于2007年7月在新疆達坂城2號風(fēng)場進行了為期三周的現(xiàn)場驗證性試驗，各模塊的分析精度與頻響范圍均達到IEC標準1級儀器的要求，所有指標的評估結(jié)果均與MEASNET成員單位所做結(jié)論保持一致。
關(guān)鍵詞：聲學(xué)噪聲；風(fēng)力發(fā)電機；視在聲功率；音調(diào)；IEC 61400-11
中圖分類號：TB52+2， TB533+.1 文獻標識碼：A
文章編號：1672-4984（2008）01-0005-05
Acoustic emission assessment of wind turbines based on IEC standard
SUN Lei1, QIN Shu-ren1, BO Lin1, XU Li-ping2
（1.Test Center，Chongqing University，Chongqing 400030，China;
2.School of Mechanical Engineering，Chongqing University，Chongqing 400030，China）
Abstract： A novel measurement and analysis methods of noise emission assessments and verifications for the wind turbine generator system, which complies with specification IEC 61400-11, were investigated. Wind speed measurement and conversion, background correction for 1/3 octave analysis, and sound pressure levels at the integer wind speed which was recommended to ensure the consistency and accuracy of this procedure were included. A practical calculation formula for the sound power level measurement of wind turbine was induced from the sound pressure level. The tonality calculation and audibility calculation were analyzed in detail based on narrowband analyses and psychoacoustics. Experiments had been carried out in Xinjiang Dabancheng No.2 Wind Farm during July 2007 in order to validate the performances of the assessment system which was developed according to the above. The analysis precision and power responding range for each module of this system were satisifed with IEC requirements for type 1 instrument. And every assessment result of each indictor was in accord with that given by MEASENT member.
Key words: Acoustic noise; Wind turbine generator; Apparent Sound Power; Tonality; IEC 61400-11 Editor：liyan
