Browse > Article
http://dx.doi.org/10.7471/ikeee.2019.23.3.785

A Study on the Droop Method with Improved Current Distribution Characteristics  

Jang, Paul (Dept. of Energy & Electrical Engineering, Korea Polytechnic University)
Publication Information
Journal of IKEEE / v.23, no.3, 2019 , pp. 785-792 More about this Journal
Abstract
In parallel operation of multiple power converter modules, equal power distribution among modules shall be made to improve the reliability of the system. In this paper, a novel droop method is proposed to present improved current distribution characteristics. In the proposed method, if the current in each module become greater than the current set-point value, the output voltage set-point is raised to improve the current distribution characteristics. Meanwhile, when the output voltage is to be managed within the tolerance range, the range of the usable control IC reference value ($v_{ref}$) will be reduced if the output voltage setting is always raised. Thus, in case the output voltage set-point among modules is reversed, the downward adjustment is introduced. The proposed method was experimentally validated with a 17.5V/500mA prototype of two boost converters operating in parallel.
Keywords
DC-DC; modular converter; parallel operation; droop; reliability;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Shiguo Luo, Zhihong Ye, Ray-Lee Lin, and Fred C. Lee, "A Classification and Evaluation of Paralleling Methods for Power Supply Modules," in Proc. IEEE PESC, vol.2, pp.901-908, 1999. DOI: 10.1109/PESC.1999.785618   DOI
2 B. T. Irving and M. M. Jovanovic, "Analysis, design, and performance evaluation of droop current-sharing method," in Proc. IEEE APEC, vol. no.1, pp. 235-241, 2000. DOI: 10.1109/APEC.2000.826110   DOI
3 V. J. Thottuvelil and G. C. Verghese, "Analysis and control design of paralleled DC/DC converters with current sharing," IEEE Transactions on Power Electronics, vol.13, no.4, pp.635-644, 1998. DOI: 10.1109/APEC.1997.575646   DOI
4 S. K. Mazumder, and M. Tahir, and K. Acharya, "Master-Slave Current-Sharing Control of a Parallel DC-DC Converter System Over an RF Communication Interface," IEEE Trans. Ind. Electron., vol.55, no.1, pp.59-66, 2008. DOI: 10.1109/TIE.2007.896138   DOI
5 Y. M. Lai, S.-C. Tan, and Y. M. Tsang, "Wireless control of load current sharing information for parallel-connected DC/DC power converters," IET Power Electron., vol.2, iss.1, pp.14-21, 2009. DOI: 10.1049/iet-pel:20070311   DOI
6 Jenn-Jong Shieh, "Peak-Current-Mode Based Single-Wire Current-Share Multimodule Paralleling DC Power Supplies," IEEE Trans. Circuits Syst. I: Fundam. Theory Appl., vol.50, no.12, pp.1564-1568, 2003. DOI: 10.1109/TCSI.2003.819829   DOI
7 S. Anand, and B. G. Fernandes, "Modified droop controller for paralleling of dc-dc converters in standalone dc system," IET Power Electron., vol.5, iss.6, pp.782-789, 2012. DOI: 10.1049/iet-pel.2011.0346   DOI
8 A. D. Erdogan, and M. T. Aydemir, "Application of Adaptive Droop Method of Boost Converters Operating at the Output of Fuel Cells," in Proc. IEEE ELECO'09, pp.I-321-I-:325, 2009. DOI: 10.1109/ELECO.2009.5355228
9 J. W. Kim and P. Jang, "Improved droop method for converterparallel operation in large-screen LCD TV applications," Journal of Power Electronics, vol.14, no.1, pp.22-29, 2014. DOI: 10.6113/JPE.2014.14.1.22   DOI
10 Hsin-Hsin Ho, Ke-Horng Chen, and Wen-Tsao Chen, "Dynamic Droop Scaling for Improving Current Sharing Performance in a System with Multiple Supplies," in Proc. IEEE ISCAS, pp.545-548, 2007. DOI: 10.1109/ISCAS.2007.378691   DOI