Research on DC Voltage Balancing Control Method of Star Connection Cascaded H Bridge Static Var Generator
He Yingjie1,2 Fu Yabin1 Duan Wenyan1
1.Electrical Engineering College Xi’an Jiaotong University Xi’an 710049 China 2.State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing 400044 China
Abstract：The in-depth study of the DC voltage balancing of the star connection cascaded H bridge multilevel static var generator (SVG) has been made in this paper. And the control system with three layers of the DC voltage balance has been established. The first layer is the total DC side voltage control, which is maintained to be constant through generating the fundamental positive sequence active current. The second layer is the balancing control between three phases. Through the injection of the zero sequence voltage into the command voltage, we can make the redistribution of the three-phase power, so as to realize the DC voltage balance between three phases. In this method, through feeding forward the power generated by the grid voltage and the output current, the rapid dynamic regulation can be achieved. The third layer is the balancing control among modules in each phase. Through fine tuning the command voltage of each module in each phase along the direction of the current, we can make the redistribution of the power absorbed by each module, so as to ensure that the DC side voltage of each module in each phase is equal to the given value.Experimental results verify the correctness and reliability of the proposed control method in the end.
何英杰,付亚斌,段文岩. 一种星接H桥级联型SVG直流侧电压均衡控制方法研究[J]. 电工技术学报, 2016, 31(11): 13-21.
He Yingjie Fu Yabin Duan Wenyan. Research on DC Voltage Balancing Control Method of Star Connection Cascaded H Bridge Static Var Generator. Transactions of China Electrotechnical Society, 2016, 31(11): 13-21.
[1] Akagi H.Classification,terminology,and application of the modular multilevel cascade converter(MMCC)[J].IEEE Transactions on Power Electronics,2011,26(11):3119-3130. [2] 单庆晓,李永东,潘孟春.级联型逆变器的新进展[J].电工技术学报,2004,19(2):1-9. Shan Qingxiao,Li Yongdong,Pan Mengchun.New progress of cascaded inverter[J].Transactions of China Electrotechnical Society,2004,19(2):1-9. [3] Peng F Z,Lai J S.Dynamic performance and control of a static var generator using cascaded multilevel inverters[J].IEEE Transactions on Industry Applications,1997,33(3):748-754. [4] Akagi H,Inoue S,Yoshii T.Control and performance of a transformerless cascaded PWM STATCOM with star configuration[J].IEEE Transactions on Industry Applications,2007,43(4):1041-1049. [5] Maharjan L,Inoue S,Akagi H.A transformerless energy storage system based on a cascade multilevel PWM converter with star configuration[J].IEEE Transactions on Industry Applications,2008,44(5):1621-1630. [6] Ota J I Y,Shibano Y,Niimura N,et al.Current control of a phase-shifted-PWM STATCOM using the modular multilevel cascade converter based on single-star bridge-cells(MMCC-SSBC)[C]//IEEE Energy Conversion Congress and Exposition,Denver,CO,2013:420-427. [7] 王志冰,于坤山,周孝信.H桥级联多电平变流器的直流母线电压平衡控制策略[J].中国电机工程学报,2012,32(6):56-63. Wang Zhibing,Yu Kunshan,Zhou Xiaoxin.Control strategy for DC bus voltage balance in cascaded H-bridge multilevel converters[J].Proceedings of the CSEE,2012,32(6):56-63. [8] Barrena J A,Marroyo L,Vidal M A R,et al.Individual voltage balancing strategy for PWM cascaded H-bridge converter-based STATCOM[J].IEEE Transactions on Industry Electronics,2008,55(1):21-29. [9] 刘文亚,姚刚,何娈,等.基于级联多电平的有源滤波器直流侧电压平衡控制[J].电力系统保护与控制,2015,43(4):94-101. Liu Wenya,Yao Gang,He Luan,et al.Research of DC voltage balance control based on multi-level cascaded APF[J].Power System Protection and Control,2015,43(4):94-101. [10]赵波,郭剑波,周飞.链式STATCOM相间直流电压平衡控制策略[J].中国电机工程学报,2012,32(34):36-41. Zhao Bo,Guo Jianbo,Zhou Fei.DC voltage balance control strategy among phases for cascaded STATCOM[J].Proceedings of the CSEE,2012,32(34):36-41. [11]Chou S F,Wang B S,Chen S W,et al.Average power balancing control of a STATCOM based on the cascaded H-bridge PWM converter with star configuration[J].IEEE Transactions on Power Electronics,2013,50(6):3893-3901. [12]杨维满,王兴贵.串联结构中H桥逆变器直流侧等效模型关系[J].电工技术学报,2015,30(16):103-110. Yang Weiman,Wang Xinggui.Relationship of DC-side equivalent model among H-bridge inverters connected in series[J].Transactions of China Electrotechnical Society,2015,30(16):103-110. [13]孙宜峰,阮新波.级联型多电平逆变器的功率均衡控制策略[J].中国电机工程学报,2006,26(4):126-133. Sun Yifeng,Ruan Xinbo.Power balance control schemes for cascaded multilevel inverters[J].Proceedings of the CSEE,2006,26(4):126-133. [14]林志勇,江道灼,周月宾,等.基于级联H桥换流器的APF-STATCOM的控制与调制[J].电力系统保护与控制,2014,42(7):91-96. Lin Zhiyong,Jiang Daozhuo,Zhou Yuebin,et al.Control and modulation for APF-STATCOM based on cascaded H-bridge converter[J].Power System Protection and Control,2014,42(7):91-96. [15]李宇飞,王跃,吴金龙,等.级联H桥变流器的波动电压生成控制策略[J].电工技术学报,2015,30(9):46-52. Li Yufei,Wang Yue,Wu Jinlong,et al.Control strategy for fluctuation voltage generation in cascaded H bridge converters[J].Transactions of China Electrotechnical Society,2015,30(9):46-52. [16]王聪,王畅,焦健,等.级联二极管H桥多电平变换器[J].电工技术学报,2014,29(1):273-281. Wang Cong,Wang Chang,Jiao Jian,et al.New cascaded diode H-bridge multi-level rectifier[J].Transactions of China Electrotechnical Society,2014,29(1):273-281. [17]杨晓冬,王崇林,史丽萍,等.级联型逆变器的统一SVPWM方法[J].电工技术学报,2014,29(6):145-152. Yang Xiaodong,Wang Chonglin,Shi Liping,et al.Generalized space vector PWM method for cascaded multilevel inverters[J].Transactions of China Electrotechnical Society,2014,29(6):145-152. [18]杜少通,杨擎,汪山林,等.五电平H桥级联型STATCOM脉冲轮换控制策略研究[J].电力系统保护与控制,2014,42(21):17-22. Du Shaotong,Yang Qing,Wang Shanlin,et al.Research on pulse rotation control strategy for 5-level cascaded H-bridge STATCOM[J].Power System Protection and Control,2014,42(21):17-22. [19]Yang X W,Jiang J G,Liu S C.A novel design approach of dc voltage controller for cascaded H-bridge converter-based STATCOM[C]//Power Electronics and Motion Control Conference,Wuhan,China,2009:2359-2364. [20]Vazquez S,Leon J I,Carrasco J M,et al.Analysis of the power balance in the cells of a multilevel cascaded H-bridge converter[J].IEEE Transations on Power Electronics,2010,57(7):2287-2296. [21]季振东,赵剑锋,孙毅超,等.三角形连接的链式H桥并网逆变器相间直流侧电压平衡控制[J].电工技术学报,2013,28(12):191-206. Ji Zhendong,Zhao Jianfeng,Sun Yichao,et al.Interphase DC voltage balancing control of cascaded H-bridge grid-connected inverter with delta configuration[J].Transactions of China Electrotechnical Society,2013,28(12):191-206. [22]季振东,赵剑锋,孙毅超,等.零序和负序电压注入的级联型并网逆变器直流侧电压平衡控制[J].中国电机工程学报,2013,33(21):9-17. Ji Zhendong,Zhao Jianfeng,Sun Yichao,et al.DC voltage balancing control for cascaded grid-connected inverters by injecting zero-sequence and negative-sequence voltages[J].Proceedings of the CSEE,2013,33(21):9-17. [23]张茂松,查晓明,孙建军,等.链式D-STATCOM的无源性控制[J].中国电机工程学报,2011,31(15):33-39. Zhang Maosong,Zha Xiaoming,Sun Jianjun,et al.Passivity-based control of cascade D-STATCOM[J].Proceedings of the CSEE,2011,31(15):33-39. [24]刘钊,刘邦银,段善旭,等.系统电压不平衡下链式静止同步补偿器控制研究[J].中国电机工程学报,2011,31(9):1-7. Liu Zhao,Liu Bangyin,Duan Shanxu,et al.Research on cascade multilevel STATCOM under unbalanced system voltage[J].Proceedings of the CSEE,2011,31(9):1-7.
2016, Vol. 31 
