Grid-connected control strategy of new dual quasi-Z-source five-level NPC inverter based on sliding mode control

被引：0
|
作者：
Li T. [1 ]
Cheng Q. [1 ]
Cheng Y. [2 ,3 ]
Sun W. [1 ]
Chen L. [1 ]
机构：
[1] College of Automation Engineering, Shanghai University of Electric Power, Shanghai
[2] College of Electronics and Information Engineering, Tongji University, Shanghai
[3] North Power Supply Branch, Shanghai Electric Power Company, Shanghai
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2019年 / 39卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Boosting ability; Five-level inverter; New dual quasi-Z-source topology; Sliding mode control; Start current;
D O I：
10.16081/j.issn.1006-6047.2019.01.003
中图分类号：
学科分类号：
摘要：
A new topology of the five-level NPC dual quasi-Z-source inverter is proposed to overcome the problems of the traditional five-level NPC(Neutral-Point-Clamped) dual Z-source inverter, such as excessive starting current of Z-source inductors and limited boosting ability. In comparison with the traditional topology, the new topology can effectively reduce the start current of the inductor of Z-source network by nearly two thirds, and double improve the DC-side voltage of the inverter. The proposed sliding mode control is applied to the control of quasi-Z-source five-level inverter system, in which the linearization can be avoided and only appropriate control law is required to be derived based on the mathematical model of the system. Firstly, the working principle of this new five-level NPC dual quasi-Z-source inverter topology is analyzed. Subsequently, the state space method and small signal model are applied to the Z-source five-level grid-connected system for mathematical model derivation and analysis. Meanwhile, the sliding mode controller is designed. Finally, the simulative and hardware experimental results show that the sli-ding mode control significantly improves the stability of the system and reduces the current harmonics compared with traditional PI(Proportional-Integral) control. © 2019, Electric Power Automation Equipment Press. All right reserved.
引用
收藏
页码：19 / 26
页数：7
相关论文
共 18 条
  • [1] Zhou Y., Huang W., Zhao J., Et al., A high gain Z-source inverter, Transactions of China Electrotechnical Society, 28, 9, pp. 239-246, (2013)
  • [2] Liu X., Zheng J., You J., Et al., Switching inductive Quasi-Z-source inverter, Electric Power Automation Equip-ment, 31, 9, pp. 65-68, (2011)
  • [3] Banaei M.R., Oskouei A.B., Dehghanzadeh A., Extended swi-tching algorithms based space vector control for five-level quasi-Z-source inverter with coupled inductors, IET Power Electronics, 7, 6, pp. 1509-1518, (2014)
  • [4] Wang X., Zhang J., Neutral-point potential balancing me-thod for switched-inductor Z-source three-level inverter, Journal of Electrical Engineering & Technology, 12, 3, pp. 1203-1210, (2017)
  • [5] Yu D., Cheng Q., Gao J., Et al., Three-level neutral-point-clamped quasi-Z-source inverter with reduced Z-source capacitor voltage, IET Electronics Letters, 53, 3, pp. 185-187, (2017)
  • [6] Bayhn S., Kakosimos P., Abu-Rub H., Model predictive control of five-level H-bridge neutral-point-clamped qZS inverter, Conference of the IEEE Industrial Electronics Society, pp. 5971-5976, (2016)
  • [7] Bayhan S., Trabelsi M., Ellabban O., A five-level neutral-point-clamped/H-bridge quasi-impedance source inverter for grid connected PV system, Conference of the IEEE Industrial Electronics Society, pp. 2502-2507, (2016)
  • [8] Zhi N., Xiao X., Tian P., Et al., Research and prospect of multi-microgrid control strategies, Electric Power Automation Equipment, 36, 4, pp. 107-115, (2016)
  • [9] Niu L., Xu D., Yang M., Et al., On-line inertia identifica-tion algorithm for PI parameters optimization in speed loop, IEEE Transactions on Power Electronics, 30, 2, pp. 849-859, (2015)
  • [10] Harnefors L., Yepes A.G., Vidal A., Et al., Passivity-based con-troller design of grid-connected VSCs for prevention of electrical resonance instability, IEEE Transactions on Industrial Electro-nics, 62, 2, pp. 702-710, (2015)
12