Research on Voltage Sharing Control Strategy of a Combined Two-Stage Modular Input-Series Output-Parallel DC-DC Converter

被引：0
|
作者：
Gu G. [1 ]
Zheng X. [1 ]
Gao M. [1 ]
Jiang T. [1 ]
Shi J. [1 ]
机构：
[1] College of Electrical Engineering, Zhejiang University, Hangzhou
来源：
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2019年 / 34卷 / 15期
关键词：
Input voltage sharing; Input-series output-parallel(ISOP); Modularity; Stability; Two-stage;
D O I：
10.19595/j.cnki.1000-6753.tces.180868
中图分类号：
学科分类号：
摘要：
Aiming at the applications of high voltage and wide voltage input, low voltage and high current output, a combined two-stage modular input-series output-parallel DC-DC converter and its voltage sharing control strategy are proposed. The module unit adopts a two-stage topology combining the LLC working in fixed-frequency and open-loop mode and the Buck working in closed-loop mode, which is both efficient and convenient for serial-parallel connection. By constructing the voltage-sharing bus and sampling the input voltage of the module indirectly, the signals are respectively superimposed on the feedback voltage and the reference voltage so that the module unit can achieve input voltage sharing by self-regulation while maintaining a good output voltage accuracy. The sampling, control and communication of the module are completed on post-stage. They work independently and simplify the circuit structure with a good modular features. Combined with the small signal model, the stability of the system is theoretically analyzed and verified by simulation. Finally, a combined ISOP converter consisting of three modular units is built in the lab to verify the strategy. © 2019, Electrical Technology Press Co. Ltd. All right reserved.
引用
收藏
页码：3175 / 3185
页数：10
相关论文
共 16 条
  • [1] Fu Z., Su X., Zhou L., A phase-shifting controlling technique for series connection of IGBTs, Journal of ChongQing University(Natural Science Edition), 26, 2, pp. 113-116, (2003)
  • [2] Bi K., An Q., Duan J., Et al., Self-balancing control strategy for super capacitor energy storage system based on cascaded multilevel DC-DC converter, Transactions of China Electrotechnical Society, 33, 8, pp. 1919-1928, (2018)
  • [3] Zhang T., Ruan X., A method to vlotage sharing and current sharing for input series output parallel full bridge converter, Proceedings of the CSEE, 25, 24, pp. 47-50, (2005)
  • [4] Ma X., Niu J., Kang Y., Study on input-series-output-parallel converter with voltage sharing between input-capacitor, Proceedings of the CSEE, 26, 16, pp. 86-91, (2006)
  • [5] Zhang J., Liu J., Yang J., Et al., Controller design and stability analysis method for input-series-output-parallel converters, Transactions of China Electrotechnical Society, 32, 17, pp. 180-188, (2017)
  • [6] Cheng L., Ruan X., Zhang T., Control strategy for input-series output-paralleled DC-DC converters, Proceedings of the CSEE, 26, 22, pp. 67-73, (2006)
  • [7] Zhuang K., Ruan X., Stability analysis of input-voltage sharing for input-series output-parallel converter, Proceedings of the CSEE, 29, 6, pp. 15-20, (2009)
  • [8] Giri R., Choudhary V., Ayyanar R., Et al., Common duty ratio control of input-series connected modular DC-DC converters with active input voltage and load-current sharing, IEEE Transactions on Industry Applications, 42, 4, pp. 1101-1111, (2006)
  • [9] Ayyanar R., Giri R., Mohan N., Active input-voltage and load-current sharing in input-series and output-parallel connected modular DC-DC converters using dynamic input-voltage reference scheme, IEEE Transactions on Power Electronics, 19, 6, pp. 1462-1473, (2004)
  • [10] Chen W., Wang G., Ruan X., Et al., Wireless input voltage sharing control strategy for input-series output-parallel (ISOP) system based on positive output-voltage gradient method, IEEE Transactions onIndustrial Electronics, 61, 11, pp. 6022-6030, (2014)
12