基于虚拟仪器的风力发电机组噪声分析系统

摘要

该文基于LabVIEW虚拟技术设计了一款界面友好、操作便捷、实用性强的噪声测试分析系统.重点阐述了频率计权算法设计,依据IEC 61672-1:2002标准中频率计权规范,对比分析了快速傅里叶变换法和数字滤波器法在实现频率计权结果中的差异.在此基础上,根据IEC61400-11-2012《风力发电机组噪声测试方法》标准,结合LabVIEW中的声音与振动工具包以及高级信号处理等函数,实现后续功能,使系统具有比较完备噪声测试分析功能.最后,以内蒙古风电场采集到的风力发电机组噪声数据为例,进行风力发电噪声分析系统的仿真验证,并对分析结果做了归纳总结.%A user-friendly, easy to operate and practical noise testing and analyzing system based on Lab-VIEW virtual technology was presented in this paper. This paper presents the design of frequency weighting algorithm,analyzes and compares the difference between fast Fourier transformation method and digital filter method in terms of the frequency weighting standard in IEC 61672-1: 2002. Also, according to the standard of IEC 61400-11: 2012"Wind turbine generators systems-Acoustic noise measurement techniques", conjunct with the sound and vibration toolkit in LabVIEW and advanced signal processing functions, we realize later functions and make the system have complete noise testing and analyzing functions. At last, taking wind turbines noise data captured from Inner Mongolia wind farm for example,we simulated and verified the noise analyzing system,and then summarized the results.