摘要
针对工频干扰范围在49 Hz^51 Hz区间波动时,传统自适应陷波器存在滤除精度不高的问题。采用快速傅立叶变换实时提取工频干扰频率值,并设计补零法在保证精度的前提下提高系统实时性。在FPGA上采用下降沿检测获得快速傅立叶变换结果的极值,通过排序法拟合出干扰频率。设计基于实时扰动频率控制的自适应陷波器,在线改变自适应陷波器的陷波频率,实时补偿干扰频率变化。研究结果表明,实时扰动频率控制的自适应陷波器,能够更好滤除49 Hz^51 Hz范围工频干扰,提高滤波性能。
In view of the characteristics of power-line interference frequency fluctuation between 49 Hz^51 Hz and non transient,traditional adaptive notch filter has the problem of low accuracy.FFT transform method is used to extract the power frequency interference frequency,and zero compensation method is used to improve the real-time performance of system in the premise of ensuring the accuracy.The extreme value of the FFT transform results is obtained by using the falling edge detection on FPGA,then interference frequency was fitted by ranking method.The design of real time control based on disturbance frequency adaptive notch filter,change adaptive notch filter notch frequency online,real-time compensation of interference frequency change.The results show that real-time adaptive disturbance frequency control of notch filter,can better remove the 49 Hz^51 Hz range of power frequency interference,improve the filtering performance.
作者
王宇
应启瑞
雷宇
王东
靳宝全
WANG Yu;YING Qirui;LEI Yu;WANG Dong;JIN Baoquan(Key Lab.of Advanced Transducers and Intelligent Control System of Ministry of Education,Tai Yuan University of Technology,Taiyuan 030024,China)
出处
《电子器件》
CAS
北大核心
2018年第2期405-410,共6页
Chinese Journal of Electron Devices
基金
国家自然科学基金项目(51375327
51504161)
山西省应用基础研究项目(201701D221115)
山西省回国留学人员科研项目(2016-035)
山西省煤基重点科技攻关项目(MQ2014-09)
