A novel measurement system specially used in noise emission assessment and verification of wind turbine generator systems is presented that complies with specifications given in IEC 61400-11 to ensure the process cons...A novel measurement system specially used in noise emission assessment and verification of wind turbine generator systems is presented that complies with specifications given in IEC 61400-11 to ensure the process consistency and accuracy. Theory elements of the calculation formula used for the sound power level of wind turbine have been discussed for the first time, and detailed calculation procedure of tonality and audibility integrating narrowband analysis and psychoacoustics is described. With a microphone and two PXI cards inserted into a PC, this system is designed in Qin′s model using VMIDS development system. Benefiting from the virtual instrument architecture, it′s the first time that all assessment process have been integrated into an organic whole, which gives full advantages of its efficiency, price, and facility. Mass experiments show that its assessment results accord with the ones given by MEASNET member.展开更多
按照IEC 61400-11-2012《风力发电机组噪声测量方法》,在山东东营"中小型风力发电机组野外测试场"对额定功率为60 k W的某型号风力发电机组进行噪声测试;并且对测试采集到的数据进行A计权视在声功率级、1/3倍频程谱和音调分...按照IEC 61400-11-2012《风力发电机组噪声测量方法》,在山东东营"中小型风力发电机组野外测试场"对额定功率为60 k W的某型号风力发电机组进行噪声测试;并且对测试采集到的数据进行A计权视在声功率级、1/3倍频程谱和音调分析。研究表明:风力发电机组运行时噪声随风速增加呈近似线性增长,背景噪声随风速增加呈非线性增长,本风力发电机组噪声的主要成分是200~2500 Hz的宽带噪声;6300 Hz的非正常高频音调是机组变流器产生的电磁噪声。展开更多
基金National Natural Science Foundation of China (50605065)
文摘A novel measurement system specially used in noise emission assessment and verification of wind turbine generator systems is presented that complies with specifications given in IEC 61400-11 to ensure the process consistency and accuracy. Theory elements of the calculation formula used for the sound power level of wind turbine have been discussed for the first time, and detailed calculation procedure of tonality and audibility integrating narrowband analysis and psychoacoustics is described. With a microphone and two PXI cards inserted into a PC, this system is designed in Qin′s model using VMIDS development system. Benefiting from the virtual instrument architecture, it′s the first time that all assessment process have been integrated into an organic whole, which gives full advantages of its efficiency, price, and facility. Mass experiments show that its assessment results accord with the ones given by MEASNET member.
