Abstract：In hybrid power systems, the use of a multiple-input converter (MIC) instead of several single-input converters leads to simpler circuit and lower cost. The energy management is always required for the MICs to make the most utilization of renewable energy. The MIC-based hybrid power system is a typical multiple-input multiple-output (MIMO) coupling system, and it has multiple operating modes. As a result, the design of the controllers is very complicated. This paper proposes one-cycle control (OCC) for double-input buck converter (DIBC) to eliminate the interactions of the control loops and thus to simplify the design of the controllers. The mode transition circuit is further proposed to realize seamless mode transition, according to the available renewable energy and the output power. The small signal models of DIBC in different operating modes are derived. It can be seen that with OCC, the two control loops are independent with each other, and no current regulator is required. Moreover, the design conditions of the output voltage regulator in different operating modes are the same. As a result, the controller design is greatly simplified. An 800 W prototype has been built and tested in the lab, and the experimental results validate the proposed OCC.
杨东升, 杨敏, 阮新波. 双输入Buck变换器的单周期控制[J]. 电工技术学报, 2012, 27(1): 162-171.
Yang Dongsheng, Yang Min, Ruan Xinbo. One-Cycle Control for Double-Input Buck Converter. Transactions of China Electrotechnical Society, 2012, 27(1): 162-171.
[1] Kim S K, Jeon J H, Cho C H, et al. Dynamic modeling and control of a grid-connected hybrid generation system with versatile power transfer[J]. IEEE Transactions on Industry Electronics, 2008, 55(4): 1677-1688. [2] Wang C S, Nehrir M H. Power management of a stand-alone wind/photovoltaic/fuel cell energy system[J]. IEEE Transactions on Energy Conversion, 2008, 23(3): 957-967. [3] Valenciaga F, Puleston P F. Supervisor control for a stand alone hybrid generation system using wind and photovoltaic energy[J]. IEEE Transactions on Energy Conversion, 2005, 20(2): 398-405. [4] Chen Y M, Liu Y C, Lin S H. Double-input PWM dc-dc converter for high/low voltage sources[J]. IEEE Transactions on Industry Electronics, 2006, 53(5): 1538-1544. [5] Qian Z J, Abdel-Rahman O, Batarseh I. An integrated four-port dc-dc converter for renewable energy applications[J]. IEEE Transactions on Power Electronics, 2010, 25(7): 1877-1887. [6] Li Y, Ruan X B, Yang D S, et al. Synthesis of multiple-input dc/dc converters[J]. IEEE Transactions on Power Electronics, 2010, 25(9): 2372-2385. [7] Chen Y M, Liu Y C, Wu F Y, et al. Multi-input converter with power factor correction and maximum power point tracking features[C]. Proceedings of IEEE Applied Power Electronics Conference, 2002: 490-496. [8] Solero L, Lidozzi A, Pomilio J A. Design of multiple-input power converter for hybrid vehicles[J]. IEEE Transactions on Power Electronics, 2005, 20(5):1007-1016. [9] Benavides N D, Chapman P L. Power budgeting of a multiple-input buck-boost converter[J]. IEEE Transactions on Power Electronics, 2005, 20(6): 1303-1309. [10] Somayajula D, Ferdowsi M. Small-signal modeling and analysis of the double-input buck-boost converter[C]. Proceedings of IEEE Applied Power Electronics Conference, 2010: 2111-2115. [11] Mummadi V, Sawant K K. Control of multi-input integrated buck-boost converter[C]. Proceedings of International Conference on Industrial and Information Systems, 2008: 1-6. [12] Li Y, Ruan X B, Yang D S, et al. Modeling, analysis and design for hybrid power systems with dual-input DC-DC converter[C]. Proceedings of IEEE Energy Conversion Congress and Exposition, 2009: 3203-3210. [13] Qian Z J, Abdel-Rahman O, Al-Atrash H, et al. Modeling and control of three-port dc-dc converter interface for satellite applications[J]. IEEE Transactions on Power Electronics, 2010, 25(3): 637-649. [14] Liu D W, Li H, Marlino L D. Design of a 6 kW multiple-input bi-directional dc-dc converter with decoupled current sharing control for hybrid energy storage elements[C]. Proceedings of IEEE Applied Power Electronics Conference, 2007: 509-513. [15] Zhao C H, Round S D, Kolar J W. An isolated three-port bidirectional DC-DC converter with decoupled power flow management[J]. IEEE Transactions on Power Electronics, 2008, 23(5): 2443-2453. [16] Smedley K M, Slobodan C. One-cycle control of switching converters[J] IEEE Transactions on Power Electronics, 1995: 10(6): 625-633. [17] Chen G Z, Smedley K M. A current source with one-cycle control and its application in serial hybrid active power filter[C]. Proceedings of IEEE Power Electronics Specialists Conference, 2003: 797-802.
2012, Vol. 27 
