An Improved Forward-Flyback Grid-Connected Micro-Inverter
Wang Xingxing1, Ji Baojian1, Hong Feng2, Ye Zunjing1
1. College of Electrical Engineering and Control Science Nanjing TECH University Nanjing 211816 China; 2. College of Electronic and Information Engineering Nanjing University of Aeronautics & Astronautics Nanjing 210016 China
Abstract：The flyback grid-connected micro-inverter has larger current ripple and lower output power, while the interleaved flyback grid-connected micro-inverter needs many switching devices and complex control strategy. Therefore, a novel single-stage forward-flyback grid-connected micro- inverter with two transformers is proposed in this paper. The proposed inverter uses only two switches in the secondary side to simplify the control strategy and guarantee high reliability. The utilization of two transformers in the topology can split the power and reduce the size of single transformer. Detailed analyses on the topology of the proposed inverter, the current control strategy, steady principle and characteristics of the circuit are presented. In addition, the simulation results and experimental data verify the feasibility of the micro-inverter.
王星星, 嵇保健, 洪峰, 叶尊敬. 一种改进的正反激并网微型逆变器[J]. 电工技术学报, 2017, 32(18): 202-210.
Wang Xingxing, Ji Baojian, Hong Feng, Ye Zunjing. An Improved Forward-Flyback Grid-Connected Micro-Inverter. Transactions of China Electrotechnical Society, 2017, 32(18): 202-210.
[1] 徐孝纯. 中国与全球气候变化[J]. 技术经济与管理研究, 2008(5): 69-72. Xu Xiaochun. Climate change of China and the world[J]. Technological Economics and Management Research, 2008(5): 69-72. [2] 王立乔, 孙孝峰. 分布式发电系统中的光伏发电技术[M]. 北京: 机械工业出版社, 2010. [3] 黄瑞哲, 陈道炼, 许志龙. 新颖的单相电压型准Z源逆变器[J]. 电工技术学报, 2015, 30(16): 33-41. Huang Ruizhe, Chen Daolian, Xu Zhilong. A novel single phase voltage mode quasi-Z-source inverter[J]. Transactions of China Electrotechnical Society, 2015, 30(16): 33-41. [4] 陈继洪, 洪峰. 一种新型的正激并网微逆变器[J]. 电工技术学报, 2015, 30(14): 286-294. Chen Jihong, Hong Feng. A novel forward grid- connected micro-inverter[J]. Transactions of China Electrotechnical Society, 2015, 30(14): 286-294. [5] 朱克平, 江道灼. 一种改进型的光伏并网逆变器[J]. 电力系统保护与控制. 2013, 41(6): 99-104. Zhu Keping, Jiang Daozhuo. An improved inverter for a grid-connected photovoltaic power system[J]. Power System Protection and Control, 2013, 41(6): 99-104. [6] 王立乔, 祝百年, 孙孝峰. 一种单级隔离型Sepic逆变器[J]. 电工技术学报, 2016, 31(18): 75-82. Wang Liqiao, Zhu Bainian, Sun Xiaofeng. A single-stage isolated Sepic inverter[J]. Transactions of China Electrotechnical Society, 2016, 31(18): 75-82. [7] 嵇保健, 洪峰. 半周控制双Buck-Boost单级逆变器[J]. 电工技术学报, 2011, 26(11): 53-60. Ji Baojian, Hong Feng. Half load-cycle worked dual Buck-Boost single-stage inverter[J]. Transactions of China Electrotechnical Society, 2011, 26(11): 53-60. [8] 周玉斐, 黄文新. 耦合电感单级升压逆变器[J]. 中国电机工程学报, 2011, 31(33): 61-67. Zhou Yufei, Huang Wenxin. A novel single-stage Boost inverter with coupled inductors[J]. Proceedings of the CSEE, 2011, 31(33): 61-67. [9] Baoming G, Haitham A, Zheng P, et al. An energy- stored quasi-Z-source inverter forapplication to photovoltaic power system[J]. IEEE Transactions on Industrial Electronics, 2013, 60(10): 4468-4481. [10] RadhaSree K, Rathore A K, Breaz E, et al. Soft-switching non-isolated current-fed inverter for PV/fuel cell applications[J]. IEEE Transactions on Industry Applications, 2015, 52(1): 351-359. [11] Kou Wei, Shi Xinchun, Wei Debing. A new hybrid mode control strategy of flyback inverter for photovoltaic AC modules[C]//IEEE International Conference on Control and Automation (ICCA 2013), Hangzhou, 2013: 1092-1097. [12] Liu Zhen, Wang Wenjiang, Wei Haicheng, et al. A novel ZVS double switch flyback inverter and pulse controlled dimming methods for flat DBD lamp[J]. IEEE Transactions on Consumer Electronics, 2011, 57(3): 995-1002. [13] Kim Y H, Kim J G, Ji Y H, et al. A new control strategy of active clamped flyback inverter for a photovoltaic AC module system[C]//8th International Conference on Power Electronics, Jeju, 2011: 1880- 1885. [14] Khalilian M, Rad M M, Adib E, et al. New single-stage soft-switching flyback inverter for AC module application with simple circuit[C]//The 6th International Power Electronics Drive Systems and Technologies Conference (PEDSTC2015), Tehran, 2015: 41-46. [15] 古俊银, 吴红飞, 陈国呈, 等. 软开关交错反激光伏并网逆变器[J]. 中国电机工程学报, 2011, 31(36): 40-45. Gu Junyin, Wu Hongfei, Chen Guocheng, et al. Soft-switching grid-connected PV inverter with interleaved flyback topology[J]. Proceedings of the CSEE, 2011, 31(36): 40-45. [16] Tamyurek B, Kirimer B. An interleaved high-power flyback inverter for photovoltaic applications[J]. IEEE Transactions on Power Electronices, 2015, 30(6): 3228-3241. [17] Kanazawa Y, Yamamoto M. A novel compact single phase inverter using transformer-linked interleaved flyback converter[C]//International Conference on Renewable Energy Research and Applications (ICRERA), Nagasaki, 2012: 1-3. [18] Kim Y H, Ji Y H, Kim J G, et al. A new control strategy for improving weighted efficiency in photovoltaic AC module-type interleaved flyback inverters[J]. IEEE Transactions on Power Electro- nices, 2013, 28(6): 2688-2699. [19] Noh Y S, Choi B Y, Lee S R, et al. An optimal method to design a trap-CL filter for a PV AC- module based on flyback inverter[J]. IEEE Transa- ctions on Industry Applications, 2012, 52(2): 555-562. [20] 张凤阁, 朱仕禄, 殷孝雎, 等. 交错反激式光伏并网微逆变器的控制器实现[J]. 电工技术学报, 2013, 28(5): 142-153. Zhang Fengge, Zhu Shilu, Yin Xiaoju, et al. Controller design of grid-connected microinverter based on interleaved flyback structure[J]. Transa- ctions of China Electrotechnical Society, 2013, 28(5): 142-153. [21] Kim Y H, Jang J W, Shin S C, et al. Weighted- efficiency enhancement control for a photovoltaic AC module interleaved flyback inverter using a synchronous rectifier[J]. IEEE Transactions on Power Electronices, 2014, 29(12): 6481-6493.
2017, Vol. 32 
