A simplified control strategy for single-phase UPS inverters

Open access

Abstract

Though there are many strategies to control single-phase uninterruptible power supply (UPS) inverters, they suffer from some drawbacks, the main being complexity. This paper proposes a simple dual-loop controller for the single-phase UPS inverter with the LC filter. The suggested control scheme uses the capacitor current as the feedback signal in the inner current loop. No fictitious phase generation or reference frame transformations are required, and simple proportional gains are employed as both voltage and current regulators. A feedforward of the derivative of the output voltage is also proposed, which significantly improves the performance of the closed loop control system. Then, based on the model of the inverter with the proposed control strategy, a simple and systematic design procedure is presented. Finally, the theoretical achievements are supported by extensive simulations.

[1] Y.Y. Tzou, R.S. Ou, S.L. Jung, and M.Y. Chnag, “Highperformance programmable AC power source with low harmonic distortion using DSP based repetitive control technique”, IEEE Trans. on Power Electronics 12, 715-725 (1997).

[2] K. Zhou, K. Low, D. Wang, F. Luo, B. Zhang, and Y. Wang, “Zero-phase odd-harmonic repetitive controller for a singlephase PWM inverter”, IEEE Trans. on Power Electronics 21 (1), 193-201 (2006).

[3] K. Zhang, Y. Kang, J. Xiong, and J. Chen, “Direct repetitive control of SPWM inverter for UPS purpose”, IEEE Trans. on Power Electronics 18 (3), 784-792 (2003).

[4] R. Ortega, G. Garcera, E. Figueres, O. Carranza, and C.L. Trujillo, “Design and application of a two degrees of freedom control with a repetitive controller in a single-phase inverter”, IEEE Int. Symp. on Industrial Electronics (ISIE) 1, 1441-1446 (2011).

[5] T. Fujii and T. Yokoyama, “FPGA based deadbeat control with disturbance compensator for single-phase PWM inverter”, Proc. IEEE Power Electron. Spec. Conf. 1, 1-6 (2006).

[6] S. Buso, S. Fasolo, and P. Mattavelli, “Uninterruptible power supply multiloop control employing digital predictive voltage and current regulators”, IEEE Trans. on Industry Applications 37 (6), 1846-1854 (2001).

[7] P. Mattavelli, “An improved deadbeat control for UPS using disturbance observers”, IEEE Trans. on Industrial Electronics 52 (1), 206-212 (2005).

[8] A. Abrishamifar, A.A. Ahmad, and M. Mohamadian, “Fixed switching frequency sliding mode control for single-phase unipolar inverters”, IEEE Trans. on Power Electronics 27 (5), 2507-2514 (2012).

[9] H. Komurcugil, “Rotating-sliding-line-based sliding-mode control for single-phase UPS inverters”, IEEE Trans. on Industrial Electronics 59 (10), 3719-3726 (2012).

[10] T.L. Tai and J.S. Chen, “UPS inverter design using discretetime sliding mode control scheme”, IEEE Trans. on Industrial Electronics 49 (1), 67-75 (2002).

[11] O. Kukrer, H. Komurcugil, and A. Doganalp, “A three-level hysteresis function approach to the sliding-mode control of single-phase UPS inverters”, IEEE Trans. on Industrial Electronics 56 (9), 3477-3486 (2009).

[12] G. Bonan, O. Mano, L.F.A. Pereira, and D.F. Coutinho, “Robust control design of multiple resonant controllers for sinusoidal tracking and harmonic rejection in Uninterruptible Power Supplies”, IEEE Int. Symp. on Industrial Electronics (ISIE) 1, 303-308 (2010).

[13] S.A. Khajehoddin, M. Karimi-Ghartemani, P.K. Jain, and A. Bakhshai, “A resonant controller with high structural robustness for fixed-point digital implementations”, IEEE Trans. on Power Electronics 27 (7), 3352-3362 (2012).

[14] K. Zhou and Y. Yang, “Phase compensation multiple resonant control of single-phase PWM inverter”, IEEE Int. Symp. on Industrial Electronics (ISIE) 1, 453-457 (2012).

[15] B. Bahrani, A. Rufer, S. Kenzelmann, and L. Lopes, “Vector control of single-phase voltage source converters based on fictive axis emulation”, IEEE Trans. on Industry Applications 47 (2), 831-840 (2011).

[16] M.J. Ryan and R.D. Lorenz, “A synchronous-frame controller for a single-phase sine wave inverter”, Proc. IEEE-APEC Conf. Rec. 1, 813-819 (1997).

[17] A. Roshan, R. Burgos, A.C. Baisden, F. Wang and D. Boroyevich, “A DQ frame controller for a full-bridge single-phase inverter used in small distributed power generation systems”, Proc. IEEE-APEC Conf. 1, 641-647 (2007).

[18] D. Dong, T. Thacker, R. Burgos, F. Wang, and D. Boroyevich, “On zero steady-state error voltage control of singlephase PWM inverters with different load types”, IEEE Trans. on Power Electronics 26 (11), 3285-3297 (2011).

[19] M.J. Ryan, W.E. Brumsickle, and R.D. Lorenz, “Control topology options for single-phase UPS inverters”, IEEE Trans. on Industry Applications 33 (2), 493-501 (1997).

[20] S. Xu, J. Wang, and J. Xu, “A current decoupling parallel control strategy of single-phase inverter with voltage and current dual closed loop feedback”, IEEE Trans. on Industrial Electronics 60 (4), 1306-1313 (2013).

[21] D. Dong, T. Thacker, I. Cvetkovic, R. Burgos, D. Boroyevich, F.F. Wang, and G. Skutt, “Modes of operation and systemlevel control of single-phase bidirectional PWM converter for microgrid systems”, IEEE Trans. on Smart Grid 3 (1), 93-104 (2012).

[22] N.M. Abdel-Rahim and J.E. Quaicoe, “Analysis and design of a multiple feedback loop control strategy for single-phase voltage-source UPS inverters”, IEEE Trans. on Power Electronics 11 (4), 532-541 (1996).

[23] P.C. Loh, M.J. Newman, D.N. Zmood, and D.G. Holmes, “Improved transient and steady-state voltage regulation for single and three phase uninterruptible power supplies”, Proc. 32nd Ann. IEEE Power Electron. Spec. Conf. 1, 498-503 (2001).

[24] Z. Yao, L. Xiao and Y. Yan, “Seamless transfer of singlephase grid interactive inverters between grid-connected and stand-alone modes”, IEEE Trans. on Power Electronics 25 (6), 1597-1603 (2010).

[25] O. Kukrer, H. Komurcugil and N.S. Bayindir, “Control strategy for single-phase UPS inverters”, IEE Electric Power Applications 150 (6), 743-746 (2003).

Bulletin of the Polish Academy of Sciences Technical Sciences

The Journal of Polish Academy of Sciences

Journal Information


IMPACT FACTOR 2016: 1.156
5-year IMPACT FACTOR: 1.238

CiteScore 2016: 1.50

SCImago Journal Rank (SJR) 2016: 0.457
Source Normalized Impact per Paper (SNIP) 2016: 1.239

Metrics

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 45 45 17
PDF Downloads 9 9 3