Abstract：The structure of inverter units connected in series has been widely applied to the reactive power compensation, frequency control of motor speed and renewable energy power generation system. The correlation and constraints among units make it very difficult to enquire the dc-side respective equivalent model of the unit. Firstly, this paper has established the voltage and current mathematical relationship of H bridge inverter units between DC and AC side. Secondly, equivalent models on the DC side of inverter units are obtained under different modulation strategy, and the relationship of DC side equivalent model among H-bridge inverters is analyzed. Finally, considering the complexity of the model, the simplified equivalent model is given. Simulation and experiment results validate the correctness of the model.
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): 102-109.
Yang Weiman,Wang Xinggui. Relationship of DC-Side Equivalent Model Among H-Bridge Inverters Connected in Series. Transactions of China Electrotechnical Society, 2015, 30(16): 102-109.
[1] Peng F Z, Lai J S. A multilevel voltage-source inverterwith separate DC sources for static var genera- tion[J]. IEEE Transaction on Industry Applications, 1997, 32(5): 1130-1138. [2] 李建林, 赵栋利, 赵斌, 等. 载波相移SPWM级联H型变流器及其在有源电力滤波器中的应用[J]. 中国电机工程学报, 2006, 26(10): 109-113. Li Jianlin, Zhao Dongli, Zhao Bin, et al. Cascade H bridge converter with carrier phase shifted SPWM technique and its application in active power filter[J]. Proceedings of the CSEE, 2006, 26(10): 109-113. [3] 孙运全, 尹强, 盛吉, 等. 载波带频率变化的PWM (VFCB-PWM)在级联有源电力滤波器中的应用[J]. 电力系统保护与控制, 2010, 38(10): 39-43. Sun Yunquan, Yin Qiang, Sheng Ji, et al. Variable frequency carrier bands PWM (VFCB-PWM) and its applications in shunt APF[J]. Power System Protection and Control, 2010, 38(10): 39-43. [4] 宫力, 康勇, 陈晶晶, 等. 链式STATCOM 直流电容电压分布式控制[J]. 电工技术学报, 2011, 26(10): 218-233. Gong Li, Kang Yong, Chen Jingjing, et al. DC capacitor voltage distributed control system for cascaded multi- level STATCOM[J]. Transactions of China Electrotech- nical Society, 2011, 26(10): 218-233. [5] 谢化安, 王永源, 万四维, 等. 东莞变电站链式STATCOM控制保护的RTDS试验研究[J]. 电力系统保护与控制, 2013, 41(4): 117-122. Xie Huaan, Wang Yongyuan, Wan Siwei, et al. Research on the control and protection system of Dongguan substation cascade static synchronous compensator based on RTDS[J]. Power System Protection and Control, 2013, 41(4): 117-122. [6] Villanueva E, Correa P, Rodríguez J. Control of a single-phase cascaded H-bridge multilevel inverter for grid-connected photovoltaic systems[J]. IEEE Transaction on Industrial Electronics, 2009, 56 (11): 4399-4406. [7] 黄立培, 马毅为, 孙凯, 等. 高效级联式光伏并网逆变器的控制[J]. 高电压技术, 2011, 37(3): 680-686. Huang lipei, Ma yiwei, Sun kai, et al. Control of high efficiency cascaded photovoltaic grid-connected inverter [J]. High Voltage Engineering, 2011, 37(3): 680-686. [8] 杨维满, 王兴贵. 光伏微源特性对串联型微网电压稳定性的影响[J]. 电网技术, 2013, 37(9): 2446-2451. Yang Weiman, Wang Xinggui. Research on influence of micro-source characteristics on voltage stability of the series micro-grid[J]. Power System Technology, 2013, 37(9): 2446-2451. [9] 陈元娣, 夏敏学, 朱忠尼. 基于阶梯波与瞬时值反馈混合控制的光伏并网级联逆变器[J]. 电力系统自动化, 2012, 36(14): 172-176. Chen Yuandi, Xia Minxue, Zhu Zhongni. Photo- voltaic grid-connected cascaded inverter based on stepped waveforms and instantaneous value feedback hybrid control[J]. Automation of Electric of Power Systems, 2012, 36(14): 172-176. [10] 查晓明, 张茂松, 孙建军. 链式D-STATCOM建模及其状态反馈精确线性化解耦控制[J]. 中国电机工程学报, 2010, 30(28): 107-113. Zha Xiaoming, Zhang Maosong, Sun Jianjun. Modeling of cascade D-STATCOM with decoupled state variable feedback linearization control[J]. Proceedings of the CSEE, 2010, 30(28): 107-113. [11] 杨晓峰, 范文宝, 王晓鹏. 基于模块组合多电平变换器的STATCOM及其控制[J]. 电工技术学报, 2011, 26(8): 7-13. Yang Xiaofeng, Fan Wenbao, Wang Xiaopeng. Static synchronous compensator based on modular multi- level converter based STATCOM and its control[J]. Transactions of China Electrotechnical Society, 2011, 26(8): 7-13. [12] 耿攀, 吴卫民, 叶银忠. 基于重复控制的单相分时复合级联光伏逆变器控制[J]. 电工技术学报, 2011, 26 (3): 116-122. Geng Pan, Wu Weimin, Ye Yinzhong. Single-phase time-sharing cascaded photovoltaic inverter based on repetitive control[J]. Transactions of China Electrote- chnical Society, 2011, 26(3): 116-122. [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- 132. Sun Yifeng, Ruan Xinbo. Power balance control schemes for cascaded multilevel inverters[J]. Procee- dings of the CSEE, 2006, 26(4): 126-132. [14] 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. [15] 许胜, 赵剑锋, 倪喜军, 等. SPWM-2H桥逆变器直流侧等效模型[J]. 电工技术学报, 2009, 24(8): 90-94. Xu Sheng, Zhao Jianfeng, Ni Xijun, et al. The DC- side equivalent model of SPWM 2H-bridge inverter[J]. Transactions of China Electrotechnical Society, 2009, 24(8): 90-94. [16] 张加胜, 张磊. PWM逆变器的直流侧等效模型研究[J]. 中国电机工程学报, 2007, 27(4): 103-107. Zhang Jiasheng, Zhang Lei. Research on the DC-side equivalent model of PWM inverters[J]. Proceedings of the CSEE, 2007, 27(4): 103-107.
2015, Vol. 30 
