基于FBD法与i_p-i_q法的改进型谐波检测方法
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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i_p-i_q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 i_p-i_q 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.
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 i_p-i_q 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.
引文
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[10]于晶荣,曹一家,关维德,等.基于FBD法的有源电力滤波器参考电流检测新方法[J].湖南大学学报:自然科学版,2011,38(2):45-50.Yu Jingrong,Cao Yijia,Guan Weide,et al. A new reference current detecting algorithm based on FBD method for active power filter[J].Journal of Hunan University:Natural Sciences,2011,38(2):45-50.
[11]陆秀令,周腊吾,张松华,等.电力谐波滑窗迭代DFT检测算法的研究与仿真[J].系统仿真学报,2008,20(14):3652-3655.Lu Xiuling,Zhou Lawu,Zhang Songhua,et al. Study and simulation of harmonic detection based on sliding-window iterative algorithm of discrete Fourier transform[J]. Journal of System Simulation,2008,20(14):3652-3655.
[12]肖厦颖,李开成,王凌云,等.一种基于小波包变换的电力系统谐波检测方法[J].电测与仪表,2017,54(24):1-6.Xiao Xiaying,Li Kaicheng,Wang Lingyun,et al. A harmonic detection method for power system based on wavelet packet transform[J]. Electrical Measurement&Instrumentation,2017,54(24):1-6.
[2]李世光,张岳,邹谦,等.一种基于LMS自适应原理的FBD谐波检测方法的研究[J].电测与仪表,2018,55(12):15-19.Li Shiguang,Zhang Yue,Zhou Qian,et al. Research on a FBD harmonic detection method based on LMS adaptive principle[J]. Electrical Measurement&Instrumentation,2018,55(12):15-19.
[3] Venturini R P,Mattavelli P,Zanchetta P,et al. Adaptive selective compensation for variable frequency active power filters in more electrical aircraft aerospace and electronic systems[J]. IEEE Transactions on Aerospace and Electronic Systems,2012,48(2):1319-1328.
[4]许鸿飞,张姣姣,庞思睿,等.基于汉宁双窗ap FFT单谱线插值的电力谐波和间谐波检测算法[J].电测与仪表,2017,54(10):87-93.Xu Hongfei,Zhang Xiaoxiao,Pang Sirui,et al. An electric power harmonic and inter-harmonic detection method based on single-spectrumline interpolation of double Hanning windows ap FFT[J]. Electrical Measurement&Instrumentation,2018,55(12):87-93.
[5] Akagi H,Kanazawa Y,Nabae A. Instantaneous reactive power compensators comprising switching devices without energy storage components[J]. IEEE Trans on Ind Appl,1984,20(3):625-630.
[6]罗昕,李成君,孔令军.一种改进的FBD谐波电流检测方法研究[J].电气传动,2013,43(12):41-45.Luo Xin,Li Chengjun,Kong Lingjun. Improved harmonic detecting method based on FBD[J]. Electric Drive,2013,43(12):41-45.
[7]王杰,申张亮.基于FBD谐波检测方法的有源电力滤波器系统设计[J].电工电气,2010(8):9-13.Wang Jie,Shen Zhangliang. Design of active power filter system based FBD harmonic detection method[J]. Electrotechnics Electric,2010(8):9-13.
[8]施烨,吴在军,窦晓波,等.基于自适应原理的改进型FBD谐波电流检测算法[J].电网技术,2014; 38(4):1051-1058.Shi Ye,Wu Zaijun,Dou Xiaobo,et al. Adaptive theory based improved FBD algorithm for harmonic current detection[J]. Power System Technology,2014,38(4):1051-1058.
[9] Dong Mingxuan,Huang Zhihao,Wu Jian,et al. Study on three-legbased three-phase four-wire shunt active power filter. IEEE 7th International Power Electronics and Motion Control Conference.[S. I.]:ECCE,2012:552-556.
[10]于晶荣,曹一家,关维德,等.基于FBD法的有源电力滤波器参考电流检测新方法[J].湖南大学学报:自然科学版,2011,38(2):45-50.Yu Jingrong,Cao Yijia,Guan Weide,et al. A new reference current detecting algorithm based on FBD method for active power filter[J].Journal of Hunan University:Natural Sciences,2011,38(2):45-50.
[11]陆秀令,周腊吾,张松华,等.电力谐波滑窗迭代DFT检测算法的研究与仿真[J].系统仿真学报,2008,20(14):3652-3655.Lu Xiuling,Zhou Lawu,Zhang Songhua,et al. Study and simulation of harmonic detection based on sliding-window iterative algorithm of discrete Fourier transform[J]. Journal of System Simulation,2008,20(14):3652-3655.
[12]肖厦颖,李开成,王凌云,等.一种基于小波包变换的电力系统谐波检测方法[J].电测与仪表,2017,54(24):1-6.Xiao Xiaying,Li Kaicheng,Wang Lingyun,et al. A harmonic detection method for power system based on wavelet packet transform[J]. Electrical Measurement&Instrumentation,2017,54(24):1-6.