Research of DC Voltage Control Based on Space Vector Modulation Method in the Delta Connection Cascaded SVG
Liu Yunfeng1, He Yingjie1,2 ,Yin Shiqi1 ,Wang Yue1 ,Liu Jinjun1
1.Electrical Engineering College of Xi’an Jiaotong University Xi’an 710049 China; 2.State Key Laboratory of Power Transmission Equipment System Security and New TechnologyChongqing University Chongqing 401121 China
Abstract：static var generator (SVG) of delta cascaded H-bridge structure can dynamically track the change of reactive load,improve power factor,restrain the voltage sag and fluctuation,and improve power quality of the grid,so it is widely researched in recent year.The DC link voltage control is a hot issue to cascaded H-bridge SVG of delta connection structure.Compared with the carrier modulation method,Space vector modulation method is suitable for a real-time implementation in digital signal processors with wide linear modulation range and lower switching loss.But the DC voltage control method based on space vector modulation in delta connection cascaded SVG has not yet been applied for DC-side voltage control.Therefore,this paper proposes three layers control system,the first layer is total DC-side voltage active power control;the second layer is interlayer voltage balance control and each phase treats as a H-bridge and use 3D SVPWM method between each phrase;the third layer applies voltage balance control among each module in each phase to achieve equivalent result between the given value and the DC-side voltage of each H-bridge.The zero-sequence current based on 3D-space vector modulation can generate in each unit switching cycle,so it can produce arbitrary order zero sequence current to achieve the DC voltage control with high speed of dynamic corresponding.Lastly,the simulation and experiments results verify the correctness and validity of the method.
刘云峰,何英杰,尹仕奇,王 跃,刘进军. 基于三维空间矢量的三角形联结级联SVG直流侧电压控制方法研究[J]. 电工技术学报, 2016, 31(23): 169-178.
Liu Yunfeng, He Yingjie ,Yin Shiqi ,Wang Yue ,Liu Jinjun. Research of DC Voltage Control Based on Space Vector Modulation Method in the Delta Connection Cascaded SVG. Transactions of China Electrotechnical Society, 2016, 31(23): 169-178.
[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] 陶兴华,李永东,孙敏.一种H桥级联型PWM整流器的直流母线电压平衡控制新方法[J].电工技术学报,2011,26(8):85-90. Tao Xinghua,Li Yongdong,Sun Min.A novel DC link voltages balancing control method for cascaded H-bridge rectifier[J].Transactions of China Electrotechnical Society,2011,26(8):85-90. [3] 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.A review on cascaded inverter[J].Transactions of China Electrotechnical Society,2004,19(2):1-9. [4] Song Wenchao,Huang A Q.Fault-tolerant design and control strategy for cascaded H-bridge multilevel converter-based STATCOM[J].IEEE Transactions on Industrial Electronics,2010,57(8):2700-2708. [5] 武健,刘瑜超,徐殿国.基于模块多电平变换器的并联有源滤波器控制策略研究[J].电工技术学报,2013,28(12):52-59. Wu Jian,Liu Yuchao,Xu Dianguo.Control strategy of shunt active power filter based on modular multilevel converter[J].Transactions of China Electrotechnical Society,2013,28(12):52-59. [6] 刘文华,宋强,滕乐天,等.基于链式逆变器的50MVA静止同步补偿器的直流电压平衡控制[J].中国电机工程学报,2004,24(2):145-150. Liu Wenhua,Song Qiang,Teng Letian,et al.Balancing control of DC voltages of 50 MVA STATCOM based on cascade multilevel inverters[J].Proceedings of the CSEE,2004,24(4):145-150. [7] Akagi H,Inoue S,Yoshii T.Control and performance of a transformer less cascade PWM STATCOM with star configuration[J].IEEE Transactions on Industry Applications,2007,43(4):1041-1049. [8] 聂子玲,张波涛,孙驰,等.级联H桥SVG直流侧电容电压的二次谐波计算[J].电工技术学报,2006,21(4):111-116. Nie Ziling,Zhang Botao,Sun Chi,et al.The 2nd harmonic calculation of the capacitor voltage in the DC link of the cascade H-bridge SVG[J].Transactions of China Electrotechnical Society,2006,21(4):111-116. [9] Liu Zhao,Liu Bangyin,Duan Shanxu,et al.A novel DC capacitor voltage balance control method for cascade multilevel STATCOM[J].IEEE Transactions on Power Electronics,2012,27(1):14-27. [10]宫力,康勇,陈晶晶.链式STATCOM直流电容电压 分布式控制[J].电工技术学报,2011,26(10):217-223. Gong Li,Kang Yong,Chen Jingjing,et al.DC capacitor voltage distributed control system for cascaded multilevel STATCOM[J].Transactions of China Electrotechnical Society,2011,26(10):217-233. [11]万承宽,杨耕,张桐硕.基于星形接法的三相链式功率调节系统直流母线电压平衡控制[J].电工技术学报,2012,27(12):256-263. Wan Chengkuan,Yang Geng,Zhang Tongshuo,et al.DC bus voltage balancing control of three-phase cascade power regulation system with star connection[J].Transactions of China Electrotechnical Society,2012,27(12):256-263. [12]Yao Wenxi,Hu Haibing,Lu Zhengyu.Comparisons of space-vector modulation and carrier-based modulation of multilevel inverter[J].IEEE Transactions on Power Electronics,2008,23(1):45-51. [13]Wei Sanmin,Wu Bin,Li Fahai,et al.A general space vector PWM control algorithm for multilevel inverters[C]//Eighteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2003,1:562-568. [14]Zhou Keliang,Wang Danwei.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. [15]Li Xiangsheng,Deng Zhiquan,Chen Zhida,et al.Analysis and simplification of three-dimensional space vector PWM for three-phase four-leg inverters[J].IEEE Transactions on Industrial Electronics,2011,58(2):450-464. [16]Hagiwara M,Maeda R,Akagi H.Negative-sequence reactive power control by a PWM STATCOM based on a modular multilevel cascade converter(MMCC-SDBC)[J].IEEE Transactions on Industry Applications,2012,48(2):720-729. [17]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):191-198,206. Ji Zhendong,Zhao Jianfeng,Sun Yichao,et al.Interphase DC voltage balancing control of cascaded H-bridge grid-connected inverter with delta configuration[J].Tansactions of China Electrotechnical Society,2013,28(12):191-198,206. [18]Akagi H,Inoue S,Yoshii T. Control and performance of a transformer less cascade PWM STATCOM with star configuration[C]//IEEE Transactions on Industry Applications,2007,43(4):1041-1049. [19]Qiu Yanhui,He Yingjie,Liu Jinjun,et al.A DC voltage control method of cascaded H-bridge inverter for power quality conditioner[C]//IEEE International Symposium on Industrial Electronics,2010:2879-2884.
2016, Vol. 31 
