Please wait a minute...
浙江大学学报(工学版)
J4  2013, Vol. 47 Issue (10): 1857-1862    DOI: 10.3785/j.issn.1008-973X.2013.10.023
电气与机械工程     
用于谐波测量的非均匀同步采样时钟产生方法
赵岩1,2, 孙玲玲2, 谭年熊1
1. 浙江大学 电气工程学院,浙江 杭州 310027；2. 杭州电子科技大学 教育部射频电路与系统重点实验室,浙江 杭州 310018
Non-uniform synchronous sampling clock generating method used in harmonics measurement
ZHAO Yan1,2, SUN Ling-ling2, TAN Nian-xiong1
1. School of Electrical Engineering, Zhejiang University, Hangzhou 310027, China; 2. Key Laboratory of RF Circuits and Systems, Ministry of Education, Hangzhou Dianzi University, Hangzhou 310018, China
 全文: PDF  HTML
摘要：

为了消除谐波采样中的频谱泄露并降低电路实现代价,提出非均匀同步过采样时钟产生方法.该方法使用延时锁定环路产生非均匀时钟,控制谐波采样的过采样间隔.通过合理设计过采样率、非均匀时钟频率的概率分布以及变化周期,使非均匀过采样噪声位于模数转换器输出带宽之外,减小了采样噪声对谐波频谱的调制影响,保证了非均匀时钟是统计意义上跟踪基波频率的同步时钟.过采样和时钟的非均匀特性大幅简化了延时锁定环路的结构,所需延时单元个数从3×104减少到125.采样数据可以作为同步采样序列直接进行快速傅里叶变换运算,无需消除非均匀采样噪声和频谱泄露的操作.在使用1.6384 MHz参考时钟、基波频率为46～54 Hz的情况下,63次谐波范围内的谐波幅度和相位测量误差分别小于0.02%和0.031°.
Abstract:

A non-uniform synchronous oversampling clock generation method was proposed to eliminate the spectral leakage and reduce the circuit cost. Non-uniform clock was generated by delay locked loop to control oversampling intervals. Oversampling ratio, probability distribution and variation period of non-uniform clock frequency were properly designed. Non-uniform oversampling noise was allocated beyond the output bandwidth of analog to digital converter. Spectrum modulation by sampling noise was suppressed. The generated non-uniform clock can be treated as synchronized clock tracking the fundamental in statistical meaning. The structure of delay locked loop was simplified by oversampling and non-uniform property. Number of delay cells was reduced from 3x104 to 125. The sampled data can be treated as uniformly sampled one and fast Fourier transform (FFT) can be directly applied, no sampling noise and spectral leakage elimination needed. When 1.6384 MHz reference clock was used and fundamental varied between 46 to 54 Hz, the amplitude and phase measurement error of harmonics within 63 times fundamental was smaller than 0.02% and 0.031 degrees respectively.
出版日期: 2013-10-01
:  TN 743  
通讯作者: 孙玲玲，女，教授，博导.     E-mail: hzllsun@163.com
作者简介: 赵岩（1978—），男，博士生，从事电能计量集成电路设计的研究.E-mail：viperoustone@163.com
服务　　
把本文推荐给朋友
加入引用管理器
E-mail Alert
RSS
作者相关文章　　

引用本文:

赵岩, 孙玲玲, 谭年熊. 用于谐波测量的非均匀同步采样时钟产生方法[J]. J4, 2013, 47(10): 1857-1862.

ZHAO Yan, SUN Ling-ling, TAN Nian-xiong. Non-uniform synchronous sampling clock generating method used in harmonics measurement. J4, 2013, 47(10): 1857-1862.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2013.10.023    或    http://www.zjujournals.com/eng/CN/Y2013/V47/I10/1857

［1］ 牛胜锁,梁志瑞,张建华,等.基于三谱线插值FFT的电力谐波分析算法［J］.中国电机工程学报,2012,32（16）：130-136.

NIU Sheng-suo, LIANG Zhi-rui, ZHANG Jian-hua, et al. An algorithm for electrical harmonic analysis based on triple-spectrum-line interpolation FFT ［J］. Proceedings of the CSEE, 2012, 32(16): 130-136.

［2］ 王继东,杨官庆,文晶.基于改进复调制细化法和加窗插值快速傅里叶变换的电力系统谐波分析［J］.电网技术,2012,36（2）：64-69.

WANG Ji-dong, YANG Guan-qing, WEN Jing. Power system harmonic analysis method based on modified multiple modulation zoom analysis and windowed interpolation FFT ［J］. Power System Technology, 2012, 36(2): 64-69.

［3］ 邱海锋,周浩.非同步采样下电网谐波分析方法的探讨［J］.继电器,2008,36（1）： 57-62.

QIU Hai-feng, ZHOU Hao. Study on the approaches of electrical harmonic analysis for asynchronous sampling ［J］. Relay, 2008, 36(1): 57-62.

［4］ 梅永,王柏林.电力系统谐波分析的同步校正法［J］.电力自动化设备,2011,31（1）： 34-37.

MEI Yong, WANG Bo-lin. Synchronizing correction for harmonics analysis of power system ［J］. Electric Power Automation Equipment, 2011, 31(1): 34-37.

［5］ 蔡忠法,陈隆道,周箭.非同步采样的同步化谐波分析算法［J］.浙江大学学报:工学版,2008,42（4）： 682-685.

CAI Zhong-fa, CHEN Long-dao, ZHOU Jian. Synchronizing harmonic analysis algorithm for asynchronous sampling ［J］. Journal of Zhejiang University: Engineering Science, 2008, 42(4): 682-685.

［6］ 蔡菲娜,左伍衡.改进的双速率同步采样法及其傅里叶变换［J］.浙江大学学报:工学版,2005,39（3）： 414-417.

CAI Fei-na, ZUO Wu-heng. Improved double speed synchronous sampling method and Fourier transform ［J］. Journal of Zhejiang University: Engineering Science, 2005, 39(3): 414-417.

［7］ JENQ Y C. Perfect reconstruction of digital spectrum from nonuniformly sampled signals ［J］. IEEE Transactions on Instrumentation and Measurement, 1997, 46(3): 649-652.

［8］ STOICA P, LI Jian, HE Hao. Spectral analysis of nonuniformly sampled data: a new approach versus the periodogram ［J］. IEEE Transactions on Signal Processing, 2009, 57(3): 843-858.

［9］ 侯世英,张诣.新型数字锁相环在三相电压型SVPWM整流器中的应用［J］.电力自动化设备,2011,31（7）： 48-51.

HOU Shi-ying, ZHANG Yi. Application of digital PLL in three-phase voltage-source SVPWM rectifier ［J］. Electric Power Automation Equipment, 2011, 31(7): 48-51.

［10］ 赵品志,杨贵杰.基于FPGA的全数字轴角变换算法［J］.哈尔滨工业大学学报,2010,42（12）：1911-1915.

ZHAO Pin-zhi, YANG Gui-jie. FPGA-based all-digital resolver-digital conversion algorithm ［J］. Journal of Harbin Institute of Technology, 2010, 42(12): 1911-1915.

［11］ 庞浩,俎云霞,李东霞,等.基于Hilbert移相滤波的全数字锁相环［J］.电网技术,2003,27（11）：55-59.

PANG Hao, ZU Yun-xia, LI Dong-xia, et al. An all digital phase-locked loop based on hilbert filtering ［J］. Power System Technology, 2003, 27(11): 55-59.

［12］ 肖帅,孙建波,耿华,等.基于FPGA实现的可变模全数字锁相环［J］.电工技术学报,2012,27（4）： 153-158.

XIAO Shuai, SUN Jian-bo, GENG Hua, et al. FPGA based ratio changeable all digital phase-locked-loop ［J］. Transactions of China Electrotechnical Society, 2012, 27(4): 153-158.

［13］ 付志红,熊学海,侯兴哲,等.基于dSPACE平台的电能计量实时仿真系统［J］.仪器仪表学报,2011,32（8）： 1763-1770.

FU Zhi-hong, XIONG Xue-hai, HOU Xing-zhe, et al. Real-time simulation system for electric energy metering based on dSPACE ［J］. Chinese Journal of Scientific Instrument, 2011, 32(8): 1763-1770.

［14］ 单长虹,王彦,陈文光,等.基于FPGA的高阶全数字锁相环的设计与实现［J］.电路与系统学报,2005,10（3）： 76-79.

SHAN Chang-hong, WANG Yan, CHEN Wen-guang, et al. Design and implementation of a high-order all DPLL based on FPGA ［J］. Journal of Circuits and Systems, 2005, 10(3): 76-79.

［15］ 邓耀华,吴黎明,张力锴,等.基于FPGA的双DDS任意波发生器设计与杂散噪声抑制方法［J］.仪器仪表学报,2009,30（11）： 2255-2261.

DENG Yao-hua, WU Li-ming, ZHANG Li-kai, et al. Design of dual DDS arbitrary wave generator based on FPGA and denoising of spur noise ［J］. Chinese Journal of Scientific Instrument, 2009, 30(11): 2255-2261.

［16］ 刘林,田进军,刘朝辉.基于DDS和直接频率合成技术的超宽带捷变频源设计与实现［J］.兵工学报,2010,31（12）： 1648-1652.

LIU Lin, TIAN Jin-jun, LIU Zhao-hui. Ultra-wideband frequency agile source design and implementation based on DDS and direct frequency synthesis ［J］. Acta Armamentarii, 2010, 31(12): 1648-1652.

［17］ Analog Devices. A technical tutorial on digital signal synthesis ［EB/OL］. ［1999-12-02］. http:∥www.analog.com/static/imported-files/tutorials/450968421DDS_Tutorial_rev12-2-99.pdf.

［18］ JENQ Y C. Digital spectra of non-uniformly sampled signals: theories and applications part I-fundamentals and high speed waveform digitizers ［C］∥ Recordings of the 5th IEEE Instrumentation and Measurement Technology Conference. San Diego: IEEE, 1988: 391-398.
No related articles found!