An Improve Synchronized Space Vector Modulation Strategy for Three-Level Inverter
Zhang Guozheng1, Chen Wei2, Gu Xin1, Li Xinmin1, Zhou Zhanqing2
1. School of Electrical Engineering and Automation Tiangong University Tianjin 300387 China; 2. School of Artificial Intelligence Tiangong University Tianjin 300387 China
Abstract Due to the limitation of switching loss, the switching frequency of three-level traction inverter for high-speed railway and urban railway is usually low than 1kHz. If the inverter is operated in the medium and high frequency regions, the decrease of carrier ratio will lead to the increase of low-order harmonics in the output voltage, so synchronous modulation strategy should be adopted. The conventional strategy can only guarantee the synchronization and symmetry of the output waveform, and fails to further optimize the quality of the output waveform. As a result, the amplitudes of low-order harmonics in the output waveform are still high. The design rules of switching sequence for the synchronous space vector modulation (SVM) were deduced according to the restriction of synchronization, three-phase symmetry, half-wave symmetry and quarter-cycle symmetry. Then an alternative switching sequence set was established, and the optimal switching sequence was obtained by evaluating the weighted total harmonic distortion. Simulation and experimental results show that the proposed strategy can effectively improve the output waveform quality of traction inverter.
Zhang Guozheng,Chen Wei,Gu Xin等. An Improve Synchronized Space Vector Modulation Strategy for Three-Level Inverter[J]. Transactions of China Electrotechnical Society, 2020, 35(18): 3908-3916.
[1] 史婷娜, 刘潮, 张国政, 等. 三电平逆变器综合性能优化不连续空间矢量调制策略[J]. 电工技术学报, 2018, 33(24): 5874-5883. Shi Tingna, Liu Chao, Zhang Guozheng, et al.Discontinuous space vector PWM for three-level inverter with comprehensive performance optimi- zation[J]. Transactions of China Electrotechnical Society, 2018, 33(24): 5874-5883. [2] 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): 924-933. Gu Xin, Liu Chao, Zhang Guozheng, et al.Space- vector based synchronous discontinuous PWM for three-level inverter with output current optimi- zation[J]. Transactions of China Electrotechnical Society, 2019, 34(5): 924-933. [3] 夏长亮, 张天一, 周湛清, 等. 结合开关表的三电平逆变器永磁同步电机模型预测转矩控制[J]. 电工技术学报, 2016, 31(20): 83-92. Xia Changliang, Zhang Tianyi, Zhou Zhanqing, et al.Model predictive torque control with switching table for neutral point clamped three-level inverter-fed permanent magnet synchronous motor[J]. Transa- ctions of China Electrotechnical Society, 2016, 31(20): 83-92. [4] 陈炜, 陈玉健, 耿强. 基于改进混合粒子群优化的特定谐波消除脉宽调制策略[J]. 天津大学学报: 自然科学与工程技术版, 2016, 49(5): 498-505. Chen Wei, Chen Yujian, Geng Qiang.Selective harmonic elimination pulse width modulation based on improved hybrid particle swarm optimization[J]. Journal of Tianjin University: Science and Techno- logy, 2016, 49(5): 498-505. [5] 谷鑫, 姜勃, 耿强, 等. 基于3次谐波控制及脉冲波动分析的三电平SHE-PWM调制优化策略[J]. 电工技术学报, 2015, 30(7): 88-96. Gu Xin, Jiang Bo, Geng Qiang, et al.An optimal SHE-PWM modulation strategy for three-level NPC converter based on third harmonic control and pulse fluctuation analysis[J]. Transactions of China Elec- trotechnical Society, 2015, 30(7): 88-96. [6] 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): 342-349. 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): 342-349. [7] Balasubramonian M, Rajamani V.Design and real- time implementation of SHEPWM in single-phase inverter using generalized hopfield neural network[J]. IEEE Transactions on Industrial Electronic, 2014, 61(11): 6327-6336. [8] Memona M A, Mekhilefa S, Mubina M, et al.Selective harmonic elimination in inverters using bio-inspired intelligent algorithms for renewable energy conversion applications: a review[J]. Rene- wable and Sustainable Energy Reviews, 2018, 82(3): 2235-2253. [9] 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(增刊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(S2): 1-9. [10] 董侃. 基于电流谐波优化的混合脉宽调制策略[J]. 电工技术学报, 2017, 32(20): 179-188. Dong Kan.Hybrid pulse width modulation strategy based on current harmonic minimum technique[J]. Transactions of China Electrotechnical Society, 2017, 32(20): 179-188. [11] Narayanan G, Ranganathan V T.Synchronised PWM strategies based on space vector approach. part 1: principles of waveform generation[J]. IET Electrical Power Applications, 1999, 146(3): 267-275. [12] Narayanan G, Ranganathan V T.Synchronised PWM strategies based on space vector approach. part 2: performance assessment and application to V/f drives[J]. IET Electrical Power Applications, 1999, 146(3): 276-281. [13] Narayanan G, Ranganathan V T.Two novel synchro- nized bus-clamping PWM strategies based on space vector approach for high power drives[J]. IEEE Transactions on Power Electronics, 2002, 17(1): 84-93. [14] Beig A R, Narayanan G, Ranganathan V T.Modified SVPWM algorithm for three level VSI with synchro- nized waveforms[J]. IEEE Transactions on Industrial Electronics, 2007, 54(1): 486-494. [15] Beig A R.Synchronized SVPWM algorithm for the overmodulation region of a low switching frequency medium-voltage three-level VSI[J]. IEEE Transa- ctions on Industrial Electronics, 2012, 59(12): 4545-4554. [16] Yang Haitao, Zhang Yongchang, Yuan Guofeng, et al.Hybrid synchronized PWM schemes for closed- loop current control of high-power motor drives[J]. IEEE Transactions on Industrial Electronic, 2017, 64(9): 6920-6929. [17] Akshay K R, Holtz J, Boller T.Synchronous optimal pulsewidth modulation for low-switching-frequency control of medium-voltage multilevel inverters[J]. IEEE Transactions on Industrial Electronics, 2010, 57(7): 2374-2381. [18] Holtz J, Xin Qi.Optimal control of medium-voltage drives-an overview[J]. IEEE Transactions on Indu- strial Electronics, 2013, 60(12): 5472-5481. [19] 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 Elec- trotechnical Society, 2015, 30(14): 333-341. [20] 吴瑕杰, 宋文胜, 冯晓云. 一种在线计算多模式空间矢量调制算法及其FPGA实现[J]. 电工技术学报, 2016, 31(18): 124-133. Wu Xiajie, Song Wensheng, Feng Xiaoyun.An on-line calculation multi-mode SVPWM algorithm and implementation based on FPGA[J]. Transactions of China Electrotechnical Society, 2016, 31(18): 124-133. [21] 孙大南. 地铁车辆牵引电传动系统控制关键技术研究[D]. 北京: 北京交通大学, 2012.
2020, Vol. 35 
