Abstract：Currently, regarding the active neutral-point-clamped multilevel inverters (ANPC), the unified theory between the triangular carrier-based sinusoidal pulse width modulation (SPWM) and space vector pulse width modulation (SVPWM) hasn’t been systematically analyzed. This paper firstly focuses on the topology and switching sequence of ANPC, and then proposes a novel method of decomposing modulation wave based on the redundancies of phase voltages. This method avoids the disadvantages of the conventional method that cannot decide the redundant states of phase voltages and the switching sequences. Meanwhile, the proposed method has definite physical meaning. It can be used in the topology, which has many phase voltage redundant states such as cascaded H-bridge multilevel inverters. By injecting zero-sequence voltage into the SPWM modulated wave and decomposing the new modulation wave according to the number of free switches, the signal of SPWM is used to control the switches directly, then the same sequence of SVPWM modulation can be uniquely determined. At last, the unified theory of the SVPWM and SPWM in N level with arbitrary number of segments sequence is deduced. Experimental results have verified the unified theory.
王超, 何英杰, 宋志顺, 彭程. 有源中点钳位多电平逆变器空间矢量调制与三角载波调制统一理论[J]. 电工技术学报, 2017, 32(14): 106-115.
Wang Chao, He Yingjie, Song Zhishun, Peng Cheng. Unified Theory between the Space Vector and the Triangular Carrier-Based PWM Strategies in Active Neutral-Point-Clamped Multilevel Inverters. Transactions of China Electrotechnical Society, 2017, 32(14): 106-115.
[1] 王若醒, 吴迎霞, 杨恢宏, 等. 两级式T型三电平光伏逆变器的关键技术研究及实现[J]. 电力系统保护与控制, 2015, 43(4): 58-62. Wang Ruoxing, Wu Yingxia, Yang Huihong, et al. Research on key technologies of double-stage T-type three-level photovoltaic inverter[J]. Power System Protection and Control, 2015, 43(4): 58-62. [2] 高建, 苏建徽, 高航, 等. 模块化多电平换流器电容电压与环流的控制策略[J]. 电力系统保护与控制, 2014, 42(3): 56-62. Gao Jian, Su Jianhui, Gao Hang, et al. Capacitor voltage and circulation current control strategy in modular multilevel converter[J]. Power System Protection and Control, 2014, 42(3): 56-62. [3] 汪玉凤, 张立, 褚占军. 载波调换调制技术在级联多电平SAPF中的应用[J]. 电力系统保护与控制, 2015, 43(6): 14-18. Wang Yufeng, Zhang Li, Chu Zhanjun. Application of carrier exchange modulation technique in multi- level cascaded SAPF[J]. Power System Protection and Control, 2015, 43(6): 14-18. [4] Pulikanti S R, Agelidis V G. Hybrid flying capacitor based active-neutral-point-clamped five level con- verter operated with SHE-PWM[J]. IEEE Transa- ctions on Industrial Electronics, 2011, 58(10): 4643- 4653. [5] Pulikanti S R, Konstantinou G S, Agelidis V G. An n -level flying capacitor based active neutral-point- clamped converter[C]//IEEE 2nd International Symposium on Power Electronics for Distributed Generation Systems (PEDG), Hefei, China, 2010: 553-558. [6] 崔文峰, 胡森军, 李武华, 等. 基于有源钳位的无变压器型单相光伏并网逆变器[J]. 电工技术学报, 2015, 30(16): 26-32. Cui Wenfeng, Hu Senjun, Li Wuhua, et al. An active voltage clamp transformerless inverter for single- phase photovoltaic grid-connected systems[J]. Transa- ctions of China Electrotechnical Society, 2015, 30(16): 26-32. [7] 王奎, 郑泽东, 李永东, 等. 基于五电平有源中点钳位型双PWM变换器的异步电机矢量控制系统[J]. 电工技术学报, 2014, 29(2): 247-252. Wang Kui, Zheng Zedong, Li Yongdong, et al. Vector control system for induction motors based on five-level active neutral-point-clamped dual-PWM converter[J]. Transactions of China Electrotechnical Society, 2014, 29(2): 247-252. [8] 姜卫东, 王群京, 史晓锋, 等. 中点箝位型三电平逆变器在空间矢量调制时中点电位的低频振荡[J]. 中国电机工程学报, 2009, 29(3): 49-55. Jiang Weidong, Wang Qunjing, Shi Xiaofeng, et al. Low frequency oscillation of neutral point voltage of neutralpoint-clamped three-level VSI under SVPWM control[J]. Proceedings of the CSEE, 2009, 29(3): 49-55. [9] 王奎, 郑泽东, 李永东. 五电平有源中点钳位型逆变器母线中点电压平衡问题[J]. 中国电机工程学报, 2012, 32(3): 30-36. Wang Kui, Zheng Zedong, Li Yongdong. Neutral point potential balancing problem of five-level active neutral-point-clamped inverter[J]. Proceedings of the CSEE, 2012, 32(3): 30-36. [10] 李宁, 王跃, 厉肃, 等. 直流电容电压自平衡的新型五电平NPC变流器空间矢量调制策略[J]. 电工技术学报, 2015, 30(6): 178-189. Li Ning, Wang Yue, Li Su, et al. DC capacitor voltage self-balancing space vector modulation strategy of five-level NPC converter[J]. Transactions of China Electrotechnical Society, 2015, 30(6): 178-189. [11] Tan Guojun, Deng Qingwei, Liu Zhan. An optimized SVPWM strategy for five-level active NPC (5L- ANPC) converter[J]. IEEE Transactions on Power Electronics, 2014, 29(1): 386-395. [12] 王奎, 郑泽东, 李永东. 基于零序电压注入的五电平有源中点钳位型逆变器多目标优化控制策略[J]. 电工技术学报, 2014, 29(6): 129-135. Wang Kui, Zheng Zedong, Li Yongdong. Multi- purpose optimal control strategy of a five-level active neutral-point clamped inverter based on zero- sequence voltage injection[J]. Transactions of China Electrotechnical Society, 2014, 29(6): 129-135. [13] 谭国俊, 刘战, 叶宗彬, 等. 基于线电压坐标系的ANPC-5L逆变器SVPWM算法的研究[J]. 中国电机工程学报, 2013, 33(30): 26-33. Tan Guojun, Liu Zhan, Ye Zongbin, et al. SVPWM algorithm based on line voltage coordinate trans- formation for ANPC-5L inverter[J]. Proceedings of the CSEE, 2013, 33(30): 26-33. [14] 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. [15] 宋文胜, 冯晓云. 一种单相三电平SVPWM调制与载波SPWM内在联系[J]. 电工技术学报, 2012, 27(6): 131-138. Song Wensheng, Feng Xiaoyun. Relationship between single phase three-level SVPWM and carrier SPWM[J]. Transactions of China Electrotechnical Society, 2012, 27(6): 131-138. [16] 李宁, 王跃, 雷万钧, 等. 三电平NPC变流器SVPWM策略与SPWM策略的等效关系研究[J]. 电网技术, 2014, 38(5): 1283-1290. Li Ning, Wang Yue, Lei Wanjun, et al. Research on equivalent between two kinds of SVPWM strategies and SPWM strategy for three-level neutral point clamped converter[J]. Power System Technology, 2014, 38(5): 1283-1290. [17] Yao Wenxi, Hu Haibing, Lu Zhengyu. Comparisons of space-vector modulation and carrier-based modulation of multilevel inverter[J]. IEEE Transa- ctions on Power Electronics, 2008, 23(1): 45-51. [18] Zhou K, Wang D. Relationship between space-vector modulation and three-phase carrier-based PWM: a comprehensive analysis[J]. IEEE Transactions on Industrial Electronics, 2002, 49(1): 186-196. [19] 陈娟, 何英杰, 王新宇, 等. 三电平空间矢量与载波调制策略统一理论的研究[J]. 中国电机工程学报, 2013, 33(9): 71-78. Chen Juan, He Yingjie, Wang Xinyu, et al. Research of the unity theory between three-level space vector and carrier-based PWM modulation strategy[J]. Pro- ceedings of the CSEE, 2013, 33(9): 71-78. [20] 刘云峰, 何英杰, 陈娟, 等. 二极管钳位多电平空间矢量与载波调制策略统一理论研究[J]. 中国电机工程学报, 2015, 35(5): 1203-1210. Liu Yunfeng, He Yingjie, Chen Juan, et al. Research of the unity theory between space vector and carrier-based PWM modulation strategy in diode clamped multilevel inverters[J]. Proceedings of the CSEE, 2015, 35(5): 1203-1210. [21] Meili J, Ponnaluri S, Serpa L, et al. Optimized pulse patterns for the 5-level ANPC converter for high speed high power applications[C]//Conference of the IEEE Industrial Electronics Society, Paris, France, 2006: 2587-2592. [22] Kieferndorf F, Basler M, Serpa L A, et al. A new medium voltage drive system based on ANPC-5L technology[C]//IEEE International Conference on Industrial Technology (ICIT), Vina del Mar, Chile, 2010: 643-649.
2017, Vol. 32 
