基于迭代频域能量算子的风电机组转速提取方法  

Use of iterative frequency domain energy operator for wind turbine instantaneous speed estimation

作　　者：徐进 宫永立 于保春 彭迪康 Xu Jin;Gong Yongli;Yu Baochun;Peng Dikang(China Green Development Investment Group Co.,Ltd.,Beijing 100020,China;Duchengweiye Group Co.,Ltd.,Beijing 100020,China;Luneng Group Co.,Ltd.,Beijing 100020,China;Key Laboratory of Power Station Energy Transfer Conversion and System(North China Electric Power University),Ministry of Education,Beijing 102206,China)

机构地区：[1]中国绿发投资集团有限公司,北京100020 [2]都城伟业集团有限公司,北京100020 [3]鲁能集团有限公司,北京100020 [4]华北电力大学电站能量传递转换与系统教育部重点实验室,北京102206

出　　处：《可再生能源》2022年第11期1481-1486,共6页Renewable Energy Resources

基　　金：国家自然科学基金项目(5210050137)。

摘　　要：由于风电机组受到变速变载的影响,对风电机组振动信号直接进行频谱或包络分析会受到频率和幅值调制的影响而无法进行有效的故障诊断。因此,需要提取振动信号的瞬时转速对振动信号进行阶次跟踪以进行阶次分析。为降低安置转速传感器的安装成本以及数据传输成本,文章提出了一种基于迭代频域能量算子(IFDEO)的风电机组无键相瞬时转速信息提取方法,弥补了常规时频分析提取时频脊线方法无法对感兴趣的振动成分进行有效的阶次跟踪的不足。通过风电场实际采集的振动数据验证了该方法的有效性,并且与窄带解调以及多阶次概率加权法(MOPA)进行了对比,验证了所提出方法的有效性。Vibrations measured from wind turbines are subjected to the frequency modulation(FM)because of the speed variation.Therefore,the instantaneous angular speed(IAS)of the wind turbine should be measured simultaneously with the vibration so that the vibration can be order tracked from the time domain to the angle domain for further analysis.In this study,a method based on the iterative frequency domain energy operator(IFDEO)is proposed to estimate the IAS using the vibration signal itself for cost saving purpose.The method can iteratively refine the order spectrum and reduce the smearing of the interested vibration components in the order spectrum.It is validated using the vibration signal measured from two 1.5 MW wind turbines and compared with two other IAS estimation methods(phase demodulation based approach and MOPA).

关 键 词：瞬时速度 风电机组 变转速 故障诊断 频率能量算子 无键相 

分 类 号：TK81[动力工程及工程热物理—流体机械及工程]