成果報告書詳細
管理番号20120000000932
タイトル*平成23年度中間年報 風力等自然エネルギー技術研究開発 次世代風力発電技術研究開発 自然環境対応技術等(風車音予測手法の開発)
公開日2012/8/9
報告書年度2011 - 2011
委託先名国立大学法人東京大学、伊藤忠テクノソリューションズ株式会社
プロジェクト番号P07015
部署名新エネルギー部
和文要約和文要約等以下本編抜粋:
1. 要約
本研究開発では、風車音を高精度に予測するための技術研究開発を行う。風車音予測技術は、大きく3 つの項目について検討、評価を行う必要がある。一つ目は運転状態を有する風車から発生する音をどのようにモデル化するか(風車音源モデル化)、二つ目は地形によってどのように音が伝搬しているか(地形効果による音伝搬モデル化)、そして三つ目は、風の有無や時間帯による影響をどう考えるか(周辺環境音のモデル化)である。
英文要約Title:Research and Development of New Energy Technology / Research and Development of Next-Generation Wind Power Generation Technology / Technology Corresponding to Natural Environment etc. / Development of Wind Farm Sound Prediction Method (FY2011-FY2012) FY2011 Annual Report
The purpose of this project is developing the wind turbine acoustic model considered operating condition by microphone array measurement and operating data acquisition at the same time. This paper reports the result of preliminary measurements and the design concept of microphone array. The Preliminary measurements were operated with sound-level meter at two field wind turbines to characterize wind turbine noise. The measurements show that wind turbine noise in these measurements has broadband characteristic whose peak exists at about 600Hz. In addition, weidentified "Swish sound" in wind turbine noise through both measurements by A-weight sound pressure level fluctuation whose period correspond with the number of blade rotation period divided by the three. The fluctuation of one-third octave band spectrum suggested that the frequency of "Swish sound" ranged higher than about 600Hz. Based on the result, we designed the microphone array which is able to analyze at sufficient spatial resolution in higher than 600Hz.We investigate some topics in this project. Development of wind farm synthetic sound model : In development of sound propagation model, it is important that this model can treat the effect from surrounding environment: By utilizing the HARMONOISE code, the simulation model for ambient environment sound with linear damping model including terrain effect was created. Then, the generic noise simulation software 'SoundPLAN' was set up for benchmark of simulation model we are developing. And for development of wind farm synthetic sound model, Modules needed for wind farm synthetic sound model were extracted. Then, the graphical user interface(GUI) to start up those modules and display simulation outcome was developed as a basic platform. Acquisition of wind farm synthetic sound data through the field test and model validation: For the analysis of propagation property at a wind power plant which consists of a single turbine and is located on a flat terrain, measurement of wind turbine sound at Yokohama City Wind Power Plant 'Hama-Wing' was performed. We sorted out the problems regarding this measurement to make them useful when selecting wind farm and preparing for measurement in FY 2012. In development of data-assimilation technique and statistical correction method in wind farm synthetic sound model, The basic outline for development of data-assimilation technique and statistical correction method to improve prediction accuracy was confirmed. We enhanse and development for public software of wind farm sound prediction model. In a part of it, we consider to implement wind farm sound prediction model in LOCALS. In preparation for implementing the prediction method in the weather simulation software 'LOCALS', the data necessary for wind farm sound prediction model that is to be developed in this project was discussed.
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