低载波比下三电平中点钳位变流器改进型同步载波脉宽调制策略研究

doi:10.19595/j.cnki.1000-6753.tces.191027

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (60676 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract When the three-level converter is applied to traction drive system of high power motor, synchronized modulation is usually used under low carrier ratio to optimize harmonic performance. Synchronized carrier based PWM (SCBPWM) is simple to calculate, but the carrier ratio must be an odd integer multiple of 3 to ensure synchronization, three-phase symmetry and half-wave symmetry, and it cannot enter the square wave modulation. In order to overcome the shortcomings of SCBPWM, this paper firstly studies the phase voltage waveforms of two SVPWM switching sequences under different carrier ratios, and then proposes an improved SCBPWM (ISCBPWM) based on modulation wave equivalence, which can realize synchronized modulation when the carrier ratio is an odd and an even integer multiples of 3, respectively. By calculating the switching angle online, the ISCBPWM can enter the square wave modulation. On this basis, the performance of ISCBPWM is analyzed and the modulation strategy based on ISCBPWM in full speed range is designed. Finally, the simulation and experimental results show that compared with the traditional SCBPWM, ISCBPWM has more suitable synchronous segments and higher DC voltage utilization. It can realize synchronous modulation at any integer multiple carrier ratio of 3 and enter the square wave modulation, and its implementation is very convenient.

Key words： Three-level synchronized modulation carrier based PWM square wave low carrier ratio

Received: 14 August 2019

PACS:

TM464

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	Gao Zhan
	Li Yaohua
	Ge Qiongxuan
	Zhao Lu
	Zhang Bo

Cite this article:

Gao Zhan,Li Yaohua,Ge Qiongxuan等. Research on Improved Synchronized Carrier Based PWM for Three-Level Neutral Point Clamped Converter under Low Carrier Ratio[J]. Transactions of China Electrotechnical Society, 2020, 35(18): 3894-3907.

URL:

https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.191027 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/I18/3894

[1] Abu-Rub H, Holtz J, Rodriguez J, et al.Medium- voltage multilevel converters-state of the art, challenges, and requirements in industrial applications[J]. IEEE Transactions on Industrial Electronics, 2010, 57(8): 2581-2596.
[2] 张钢, 董侃, 刁利军, 等. 大功率牵引逆变器的中频区调制算法对比研究[J]. 电工技术学报, 2016, 31(2): 1-9.
Zhang Gang, Dong Kan, Diao Lijun, et al.A comparative study of the modulation algorithm in middle frquency region for high power traction inverter[J]. Transactions of China Electrotechnical Society, 2016, 31(2): 1-9.
[3] 王琛琛, 周明磊, 游小杰. 大功率交流电力机车脉宽调制方法[J]. 电工技术学报, 2012, 27(2): 173-178.
Wang Chenchen, Zhou Minglei, You Xiaojie.Research on the PWM method of high power AC electrical locomotive[J]. Transactions of China Electrotechnical Society, 2012, 27(2): 173-178.
[4] 周明磊. 电力机车牵引电机在全速度范围的控制策略研究[D]. 北京: 北京交通大学, 2013.
[5] Wu Bin.High-power converters and AC drives[M]. Hoboken: Wiley-IEEE Press, 2006.
[6] 殷正刚. 大功率三电平逆变器脉宽调制及磁场定向控制的研究[D]. 北京: 中国科学院大学, 2012.
[7] 张志刚, 黄守道, 胡存刚, 等. 三电平SHEPWM与SVPWM混合控制策略及其矢量平滑切换方法的研究[J]. 电工技术学报, 2015, 30(14): 342-348.
Zhang Zhigang, Huang Shoudao, Hu Cungang, et al.Hybrid method of three-level SHEPWM and SVPWM and its vector smooth-switching[J]. Transactions of China Electrotechnical Society, 2015, 30(14): 342-348.
[8] 李贵彬, 李永东, 郑泽东, 等. 基于SHEPWM调制的电力机车全速度运行策略及切换方法研究[J]. 电机与控制学报, 2017, 21(4): 17-24.
Li Guibin, Li Yongdong, Zheng Zedong, et al.Research on the electric locomotive running and cutover methods using SHEPWM in whole speed range[J]. Electric Machines and Control, 2017, 21(4): 17-24.
[9] 张永昌, 赵争鸣, 张颖超. 三电平逆变器SHEPWM多组解特性比较及实验[J]. 电工技术学报, 2007, 22(3): 60-65.
Zhang Yongchang, Zhao Zhengming, Zhang Yingchao.Comparison and experiment of multiple solutions for SHEPWM applied to three-level inverter[J]. Transa- ctions of China Electrotechnical Society, 2007, 22(3): 60-65.
[10] Holtz J, Oikonomou N.Fast dynamic control of medium voltage drives operating at very low switching frequency-an overview[J]. IEEE Transactions on Industry Electronics, 2008, 55(3): 1005-1013.
[11] 王堃, 游小杰, 王琛琛, 等. 低开关频率下SHEPWM和SVPWM同步调制策略比较研究[J]. 电工技术学报, 2015, 30(14): 333-341.
Wang Kun, You Xiaojie, Wang Chenchen, et al.Research on the comparison of synchronized modu- lation of SHEPWM and SVPWM under low switching frequency[J]. Transactions of China Electrotechnical Society, 2015, 30(14): 333-341.
[12] 王堃, 游小杰, 王琛琛, 等. 低开关频率下SVPWM同步调制策略比较研究[J]. 中国电机工程学报, 2015, 35(16): 4175-4183.
Wang Kun, You Xiaojie, Wang Chenchen, et al.Researchon synchronized SVPWM strategies under low switching frequency[J]. Proceedings of the CSEE, 2015, 35(16): 4175-4183.
[13] Beig A R, Narayanan G, Ranganathan V T.Modified SVPWM algorithm for three level VSI with synch- ronized and symmetrical waveforms[J]. IEEE Transa- ctions on Industrial Electronics, 2007, 54(1): 486-494.
[14] Beig A R.Synchronized SVPWM algorithm for the overmodulation region of a low switching frequency medium-voltage three-level VSI[J]. IEEE Transac- tions on Industry Electronics, 2012, 59(12): 4545-4554.
[15] 葛兴来, 张晓华, 岳岩. 低载波比下三电平NPC逆变器同步SVPWM算法[J]. 电机与控制学报, 2018, 22(9): 24-32.
Ge Xinglai, Zhang Xiaohua, Yue Yan.Comparative study on synchronized space vector PWM for three level neutral point clamped VSI under low carrier ratio[J]. Electric Machines and Control, 2018, 22(9): 24-32.
[16] 谷鑫, 刘潮, 张国政, 等. 三电平逆变器同步不连续空间矢量调制输出电流优化策略[J]. 电工技术学报, 2019, 34(5): 38-47.
Gu Xin, Liu Chao, Zhang Guozheng, et al.Space- vector based synchronous discontinuous PWM for three-level inverter with output current optimization[J]. Transactions of China Electrotechnical Society, 2019, 34(5): 38-47.
[17] Holmes D G, Lipo T A.Pulse width modulation for power converters: principles and practice[M]. New York: IEEE Press, 2003.
[18] Wang Fei.Sine-triangle versus space-vector modu- lation for three-level PWM voltage-source inver- ters[J]. IEEE Transactions on Industry Applications, 2002, 38(2): 500-506.
[19] Kanchan R S, Gopakumar K, Kennel R.Synchronised carrier-based SVPWM signal generation scheme for the entire modulation range extending up to six-step mode using the sampled amplitudes of reference phase voltages[J]. IET Electric Power Applications, 2007, 1(3): 407-415.
[20] 吴洪洋, 何湘宁. 多电平载波PWM法与SVPWM 法之间的本质联系及其应用[J]. 中国电机工程学报, 2002, 22(5): 10-15.
Wu Hongyang, He Xiangning.Relationship between multilevel carrier-based PWM and SVPWM and its applications[J]. Proceedings of the CSEE, 2002, 22(5): 10-15.
[21] 许胜, 赵剑锋. 基于不对称规则采样法的级联H桥型变流器CPS-SPWM输出电压谐波特性分析[J]. 电工技术学报, 2011, 26(6): 121-128.
Xu Sheng, Zhao Jianfeng.Analysis of the harmonic characteristics of the CPS-SPWM output voltage of cascaded H-bridge converters based on irregular sampling[J]. Transactions of China Electrotechnical Society, 2011, 26(6): 121-128.