Designing an Applicable MIMO DC-DC Converter with Multivariable Controller for SMES System
Subject Areas : electrical and computer engineeringM. R. Alizadeh Pahlavani 1 , S. Taghipour Broujeni 2
1 -
2 -
Keywords: SMES systems MIMO DC-DC converter multivariable control Strategy voltage regulation,
Abstract :
In modern power systems, utilization of renewable energy sources makes some difficulties for the power grid. One of these problems is shortage of electrical power during conditions which renewable energy sources cannot generate electrical power. For example, during shading conditions, the output power of the PV array is negligible. Using SMES (Superconducting Magnetic Energy Storage) systems is one of the applicable solutions which has been proposed to solve mentioned problem. In SMES system, energy is stored at high power inductances and during critical conditions; this power can be delivered to the load. One of the important parts of SMES systems is Multi input - Multi Output (MIMO) DC-DC converter. In this paper, at first step, one topology has been designed for the MIMO DC-DC converter. This topology has remarkable advantages such as fewer electrical elements and better controllability than other topologies. In the second part of this paper, based on multivariable controller strategy, an efficient controller has been designed for the SMES system which can set the output voltages of DC-DC converter at predetermined values. The most important feature of proposed controller is its efficiency at different conditions which some of these conditions make serious problems for conventional controllers. Generally, the objective of this paper is designing one SMES systems with an appropriate controller, which can regulate the output voltages at different conditions.
[1] H. P. Le, et al., "A single-inductor switching DC-DC converter with five outputs and ordered power-distributive control," IEEE J. of Solid-State Circuits, vol. 42, no. 12, pp. 2706-2714, Dec. 2007.
[2] A. Nami, F. Zare, A. Ghosh, and F. Blaabjerg, "Multi-output DC-DC converters based on diode-clamped converters configuration: topology and control strategy," IET Power Electronics, vol. 3, no. 2, pp. 197-208, Mar. 2010.
[3] A. Nami, F. Zare, A. Ghosh, and F. Blaabjerg, "A hybrid cascade converter topology with series-connected symmetrical and asymmetrical diode-clamped H-bridge cells," IEEE Trans. Power Electron., vol. 26, no. 1, pp. 51-65, Jan. 2011.
[4] Y. C. Liu and Y. M. Chen, "A systematic approach to synthesizing multi-input DC-DC converters," IEEE Trans. on Power Electronics, vol. 24, no. 1, pp. 116-127, Jan. 2009.
[5] D. Ma, W. H. Ki, C. Y. Tsui, and P. K. Mok, "Single-inductor multiple-output switching converters with time-multiplexing control in discontinuous conduction mode," IEEE J. of Solid-State Circuits, vol. 38, no. 1, pp. 89-100, Feb. 2003.
[6] D. Ma, W. H. Ki, and C. Y. Tsui, "A pseudo-CCM/DCM SIMO switching converter with freewheel switching,", IEEE J. of Solid-State Circuits vol. 38, no. 6, pp. 1007-1014, Jun. 2003.
[7] P. Patra, J. Ghosh, and A. Patra, "Control scheme for reduced cross-regulation in single-inductor multiple-output DC-DC converters," IEEE Trans. on Industrial Electronics, vol. 60, no. 11, pp. 5095-5104, Nov. 2013.
[8] B. Bahrani, J. D. Dasika, M. Saeedifard, A. Karimi, and A. Rufer, "Multivariable control of single-inductor dual-output buck converters," in Proc. 28th Annual IEEE Applied Power Electronics Conf. and Exposition, pp. 1103-1108, 17-21 Mar. 2013.
[9] Z. Shen, X. Chang, W. Wang, X. Tan, N. Yan, and H. Min, "Predictive digital current control of single-inductor multiple-output converters in CCM with low cross regulation," IEEE Trans. Power Electron., vol. 27, no. 4, pp. 1917-1925, Apr. 2012.
[10] K. Y. Lin, C. S. Huang, D. Chen, and K. H. Liu, "Modeling and design of feedback loops for a voltage-mode single-inductor dual-output buck converter," in Proc. IEEE Power Electronics Specialists Conf., PESC'08, pp. 3389-3395, 15-19 Jun. 2008.
[11] A. Pizzutelli and M. Ghioni, "Novel control technique for single inductor multiple output converters operating in CCM with reduced cross regulation," in Proc. 23rd Annu. IEEE Appl. Power Electron. Conf. Expo., pp. 1502-1507, 24-28 Feb. 2008.
[12] G. Galdos, A. Karimi, and R. Longchamp, "H∞ controller design for spectral MIMO models by convex optimization," J. Process Control, vol. 20, no. 10, pp. 1175-1182, Dec. 2010.
