Please wait a minute...
JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE)
    
SPWM pulse generator and novel method for pulse competition elimination
WANG Yue1,YANG Kun1,YANG Hua2,CHEN Guo-zhu1
1.College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China; 2.STSAIL Science-technology Co.,LTD, Huzhou 313200, China
Download:   PDF(1403KB) HTML
Export: BibTeX | EndNote (RIS)      

Abstract  

To implement dual-frequency carrier phase-shifted sinusoidal pulse width modulation (CPS-SPWM) strategy in cascaded distribution static synchronous compensator (DSTATCOM) system, a field programmable gate array (FPGA) based universal CPS-SPWM pulse generator was designed, for which switching frequency as well as cascade number can be selected with master computer.Basic principles, hardware configuration and universality design of the SPWM pulse generator were described. Aimed at undesired logic competition caused by low switching frequency in cascaded multi-level converter, the paper analysed its generation mechanism and presented a new method for eliminating the competition pulses by limiting the PWM reversion times in each rising/descending half cycle of the triangular carrier wave. At last, the SPWM pulse generator was applied to a 10kV/2MVar rated DSTATCOM system, experimental results showed the accuracy and reliability of the pulse generator, verified the superiority of the proposed eliminating method for the competition pulses.



Published: 01 April 2015
CLC:  TM 762  
Cite this article:

WANG Yue,YANG Kun,YANG Hua,CHEN Guo-zhu. SPWM pulse generator and novel method for pulse competition elimination. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2014, 48(6): 2-.

URL:

http://www.zjujournals.com/eng/     OR     http://www.zjujournals.com/eng/Y2014/V48/I6/2


通用SPWM发生器的实现及脉冲竞争消除新方法

为实现载波移相(CPS)正弦脉冲宽度调制(SPWM)策略在级联配电网静止同步补偿器(DSTATCOM)中的应用,设计基于现场可编程门阵列(FPGA)芯片的载波移相通用多路SPWM发生器,载波频率、级联数可通过上位机进行选择.介绍通用多路SPWM发生器的设计原理、硬件结构及其通用性设计方法.针对大功率级联多电平逆变器较低器件开关频率时SPWM调制存在的脉冲竞争现象,分析产生机理并采用在三角波的升、降半周期内限制PWM信号翻转次数的新方法予以消除.在10 kV/2MVar的DSTATCOM装置上进行验证实验,实验结果证明所设计SPWM发生器准确、可靠以及脉冲竞争消除新方法的优越性.

[1]PENG F Z,LAI J S,MCKEEVER J,et al.A multilevel voltage-source inverter with separate DC sources for static Var generation [J].IEEE Transactions on Industry Applications,1996,32(5):1130-1138.
[2]LAI J S,PENG F Z.Multilevel converters—a new breed of power converters[J].IEEE Transactions on Industry Applications,1996,32(3):509-517.
[3]李建林,王立乔,李彩霞,等.基于现场可编程门阵列的多路PWM波形发生器[J].中国电机工程学报,2005,25(10):55-59.
LI Jian-lin,WANG Li-qiao,LI Cai-xi,et al.Multi-PWM pulse generator based FPGA[J].Proceedings of the CSEE,2005,25(10):55-59.
[4]戴珂,徐晨,丁玉峰,等.载波轮换调制在级联H桥型STATCOM中的应用[J].中国电机工程学报,2013,33(12):99-106.
DAI Ke,XU Chen,DING Yu-feng,et al.The applications of carrier rotation modulation on cascaded H-bridges STATCOMs[J].Proceedings of the CSEE,2013,33(12):99-106.
[5]陈远华,刘文华,宋强.基于FPGA的级联逆变器直接PWM发生器[J].电力系统自动化,2006,30(09):61-63.
CHEN Yuan-hua,LIU Wen-hua,SONG Qiang.FPGA-based multilevel direct PWM generator for H-bridge inverters [J].Automation of Electric Power Systems,2006,30(09):61-63.
[6]MCGRATH B P,HOLMES D G.Multicarrier PWM strategies for multilevel inverters [J].IEEE Transactions on Industrial Electronics,2002,49(4):858-867.
[7]许湘莲.基于级联多电平逆变器的STATCOM及其控制策略研究[D].武汉:华中科技大学,2006.
XU Xiang-lian.Research on cascaded multilevel inverter based STATCOM and its control[D].Wuhan:Huazhong university of science & technology,2006.
[8]耿俊成,刘文华,袁志昌,等.链式STATCOM电容电压不平衡现象研究(一)仿真和研究[J].电力系统自动化,2003,27(16):53-57.
GENG Jun-cheng,LIU Wen-hua,Yuan Zhi-chang. Reserch on the voltage unbalance of DC capacitors of cascaded STATCOM part one simulations and experiments[J].Automation of Electric Power Systems,2003,27(16):53-57.
[9]耿俊成,刘文华,袁志昌,等.链式STATCOM电容电压不平衡现象研究(二)数学模型[J].电力系统自动化, 2003,27(17):35-39.
GENG Jun-cheng,LIU Wen-hua,YUAN Zhi-chang.Reserch on the voltage unbalance of DC capacitors of cascaded STATCOM part two mathematical model[J].Automation of Electric Power Systems,2003,27(17):35-39.
[10]杨昆,陈磊,陈国柱.DSTATCOM补偿不平衡负载分序控制策略[J].电力自动化设备,2012,32(07):36-41.
YANG Kun,CHEN Lei,CHEN Guo-zhu.Individual sequence control of DSTATCOM compensation for unbalanced load[J].Electric Power Automation Equipment,2012,32(07):36-41.
[11]常国祥,王成元,夏加宽,等.一种新的基于FPGA的多路SPWM波形发生器[J].中国电机工程学报,2006,26(25):51-54.
CHANG Guo-xiang,WANG Cheng-yuan,XIA Jia-kuan,et al.A novel multi-channel SPWM wave generator based FPGA[J].Proceedings of the CSEE,2006,26(25):51-54.
[12]胡海兵,姚文熙,江辉鸿,等.任意路通用PWM波形发生器设计[J].电工技术学报,2008,23(12):115-119.
HU Hai-bing,YAO Wen-xi,JIANG Hui-hong,et al.Design of a universal PWM generator with arbitrary number of PWM channels [J].Transactions of China Electrotechnical Society,2008,23(12):115-119.
[13]MEKHILEF S,MASAOUD A.Xilinx FPGA based multilevel PWM single phase inverter [J].IEEE International Conference on Industrial Technology, 2006,5(06):259-264.
[14]刘春喜,孙驰,高姬.数字SPWM方法对系统延时的影响[J].电力自动化设备,2013,33(06):75-80.
LIU Chun-xi,SUN Chi,GAO Ji.Effect of digital SPWM on system delay[J].Electric Power Automation Equipment,2013,33(06):75-80.
[15]陈增禄,毛惠丰,周炳根,等.SPWM数字化自然采样法的理论及应用研究[J].中国电机工程学报,2005,25(01):32-37.
CHEN Zeng-lu,MAO Hui-feng,ZHOU Bing-gen,et al.A study on theory and application of digital natural sampling based SPWM[J].Proceedings of the CSEE,2005,25(01):32-37.    

[1] XIE Peng kang, CHEN Heng lin, CHEN Guo zhu. Magnetic loss characteristics of three phase hexastyle magnetically controlled reactors with hexastyle and parallel valve structure[J]. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2015, 49(12): 2418-2424.
[2] CHEN Xiao, Chen Heng-Lin, CHEN Guo-zhu. Three-phase four-wire shut active power filter with coupled inductors[J]. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2015, 49(8): 1529-1536.
[3] YANG Kun, WANG Yue, CHEN Guo-zhu. Repetitive control strategy of DSTATCOM based on error regulator[J]. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2015, 49(6): 1087-1092.
[4] WANG Yue,YANG Kun,YANG Hua,CHEN Guo-zhu. Implementation of universal SPWM pulse generator and novel method for pulse competition elimination[J]. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2014, 48(11): 2087-2093.
[5] WANG Zhi-heng,YANG Qing-hua,HU Xin-hua,RUAN Jian. Derating characteristics of metal cold extrusion with function of chattering[J]. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2014, 48(11): 1983-1993.
[6] WANG Zhi-heng,YANG Qing-hua,HU Xin-hua,RUAN Jian. Derating characteristics of metal cold extrusion with function of chattering[J]. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2014, 48(6): 3-.
[7] ZHONG Xiao-jian, FENG Xia, XU Qun-wei, CHEN Guo-zhu. Control strategy based on ABC frame for three-phase four-wire shunt active power filter[J]. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2014, 48(5): 889-895.
[8] WANG Yue, YANG Kun, ZHONG Xiao-jian, CHEN Guo-zhu. Shunt APF control strategy based on multiple synchronous rotating transform[J]. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2013, 47(4): 705-710.
[9] YANG Kun, CHEN Lei, CHEN Guo-zhu. High performance compensation current control strategy of #br# single-phase SVG[J]. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2013, 47(2): 339-344.