Novel Z-source inverter with voltage multiplier unit

被引：0
|
作者：
Liu Y. [1 ]
Ding X. [1 ]
Zhao D. [1 ]
Li K. [1 ]
Hao Y. [1 ]
机构：
[1] School of Information and Control Engineering, Qingdao University of Technology, Qingdao
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2021年 / 42卷 / 08期
关键词：
Inverters; Photovoltaic; Topology; Voltage multiplier cell; Z-source inverter (ZSI);
D O I：
10.19912/j.0254-0096.tynxb.2019-0520
中图分类号：
学科分类号：
摘要：
Traditional single-stage boost inverter can overcome the disadvantages of incompatibility between boost and inverter. However, the boosting capability of this type of circuit is limited by the modulation factor M owing to the structure of the topology so that it cannot fully exploit its advantages. Aiming at the existing technical defects, this paper proposed a high-boost single-stage inverter, which uses the improved voltage multiplier unit of DC-side and shoot-through state of inverter-side to realize dual degree of freedom adjustment of the AC output voltage, and a large boost factor can be obtained when the duty ratio is low. The buffering effect of the capacitor can effectively reduce the switch-voltage spikes of the DC-link voltage, and the inverter's effect becomes more prominent. Therefore, proposed inverter is suitable for the inverter with high boosting requirements for photovoltaic grid connection. This paper described the working state of the inverter, and carried out theoretical analysis and simulation verification, and did the circuit parameter comparisons with the classical converter. Then a 600 W prototype was built to verify the feasibility of the circuit. The final experimental results verify the feasibility and correctness of the proposed inverter. © 2021, Solar Energy Periodical Office Co., Ltd. All right reserved.
引用
收藏
页码：133 / 139
页数：6
相关论文
共 22 条
  • [1] LIU H P, WANG W, WU H., Control strategy of on-grid current based on one-cycle Z-source capacitor voltage-change adjustment, Acta energia solaris sinica, 35, 6, pp. 979-984, (2014)
  • [2] ZHANG C, HE X N., Short-current combined with perturbation and observation maximum-power-point tracking method for photovoltaic power systems, Proceedings of the CSEE, 26, 20, pp. 98-102, (2006)
  • [3] ZHONG C, ZHOU S K, YAN G G, Et al., A new frequency regulation control strategy for photovoltaic power plant based on variable power reserve level control, Transactions of China Electrotechnical Society, 34, 5, pp. 1013-1024, (2019)
  • [4] YUAN H., Research based on high step-up boost converter with switch-coupled inductor, (2016)
  • [5] PENG F Z., Z-Source inverter, IEEE transactions on industry application, 39, 2, pp. 504-510, (2003)
  • [6] ABU-RUB H, IQBAL A, MOIN AHMED S, Et al., Quasi-Z-source inverter-based photovoltaic generation system with maximum power tracking control using ANFIS, IEEE transactions on sustainable energy, 4, 1, pp. 11-20, (2013)
  • [7] LI L L, TANG Y, XIE S J, Et al., New peak DC-link voltage control strategy of Z-source inverters, Journal of Nanjing University of Aeronautics and Astronautics, 46, 1, pp. 72-77, (2014)
  • [8] QU A W, CHEN D L, SU Q., Simple boost modified space vector modulation strategy for three-phase quasi-Z-source, Transactions of China Electrotechnical Society, 33, 4, pp. 826-836, (2018)
  • [9] WANG Z, GUO Y G, GUO Y, Et al., Quasi Z-source six-leg voltage-source inverter based on a new space vector modulation strategy, Power system protection and control, 46, 21, pp. 45-54, (2018)
  • [10] ZHANG L J, TAN G J, CHEN L P., Neutral-point potential balance control for three-level Z-source inverters based on double modulation wave technique, Power system protection and control, 41, 7, pp. 91-96, (2013)
123