摘要
分析了基于FBD(Fryze-Buchholz-Dpenbrock)谐波检测法的基本原理,针对传统FBD法应用于三相四线制系统时计算相对复杂以及滤波环节局限于低通滤波器的现象,提出了一种改进型谐波电流检测方法。首先设计了一种FBD法与ip-iq法相结合的谐波电流检测方法,在提高系统灵活性的同时保障了稳定性;其次利用DFT(Discrete Fourier Transform)滑窗迭代滤波模块代替低通滤波器的作用,并采用小波变换对总谐波信号作进一步优化,提高了滤波环节的精确性和实时性。最后通过仿真验证了此方法的可行性和优越性。
The basic principle of harmonic detection method based on FBD (Fryze-Buchholz-Dpenbrock) was analyzed,in view of the traditional FBD method applied to three-phase four-wire system with complicate calculation and the limitation of the filter link to the low-pass filter,an improved harmonic current detection method was proposed in this paper.Firstly,a harmonic current detection method combining FBD and ip-iq method was designed,the flexibility of system is improved and its stability is ensured.Secondly,sliding-window iterative of discrete fourier transform filter module was used to replace the low-pass filter,and the total harmonic component was further optimized by wavelet transform,which improved the accuracy and real-time of the filtering process.Finally,the feasibility and superiority of this method are verified by simulation experiments.
作者
高正中
田朔
李雪杨
夏杰
刘向勇
Gao Zhengzhong;Tian Shuo;Li Xueyang;Xia Jie;Liu Xiangyong(School of Electrical Engineering and Automation,Shandong University of Science and Technology,Qingdao 266590,Shandong,China)
出处
《电测与仪表》
北大核心
2019年第11期128-133,共6页
Electrical Measurement & Instrumentation
基金
中国博士后科学基金资助项目(2015T80729)
关键词
FBD法
IP-IQ法
谐波检测
DFT滑窗迭代
小波变换
FBD method
ip-iq method
harmonic detection
sliding-window iteration of DFT
wavelet transform
