© The Institution of Engineering and Technology
This study presents an optimisation technique for proportional-integral-derivative (PID) controller to achieve maximum-power-point tracking (MPPT) of single-ended primary-inductor converter (SEPIC). A new weight function is developed to optimise the PID parameters based on gradient-descent (GD) method by adding low-pass filter term. The proposed optimisation method does not stick in the local minima, which happens frequently with the traditional weight function used in GD method, where the low-pass filter term suppresses the noise and smooths the iteration process. The prototype of the proposed optimised PID-based SEPIC converter for photovoltaic inverter applications is built using DSP-based TMS320F28335. The performance of the proposed optimised PID-based MPPT scheme is tested in both simulation and experiment at different operating conditions. A performance comparison of the proposed GD method with the conventional GD PID is also made in real-time. It is found that the proposed optimised PID-based SEPIC converter is superior to the conventional GD PID controller in terms of power transfer and efficiency. Furthermore, the proposed optimised PID controller for two-level inverter can achieve a better total harmonic distortion (THD) level as compared to the multi-level inverter frequently used by researchers for the same purpose.
References
-
-
1)
-
7. Esme, U.: ‘Application of Taguchi method for the optimization of resistance spot welding process’, Arab. J. Sci. Eng., 2009, 34, (2B), pp. 519–528.
-
2)
-
26. Selvaraj, J., Rahim, N.A.: ‘Multilevel inverter for grid-connected PV systems employing digital PI controller’, IEEE Trans. Ind. Electron., 2009, 56, (1), pp. 149–158 (doi: 10.1109/TIE.2008.928116).
-
3)
-
27. Rahim, N.A., Selvaraj, J.: ‘Multistring five-level inverter with novel PWM control scheme for PV application’, IEEE Trans. Ind. Electron., 2010, 57, (6), pp. 2111–2123 (doi: 10.1109/TIE.2009.2034683).
-
4)
-
29. McCormack, A.S., Godfrey, K.R.: ‘Rule-based autotuning based on frequency domain identification’, IEEE Trans. Control Syst. Technol., 1998, 6, (1), pp. 43–61 (doi: 10.1109/87.654876).
-
5)
-
15. Hyun-Lark, D.: ‘Soft-switching SEPIC converter with ripple-free input current’, IEEE Trans. Power Electron., 2012, 27, pp. 2879–2887 (doi: 10.1109/TPEL.2011.2175408).
-
6)
-
22. Femia, N., Granozio, D., Petrone, G., Spagnuolo, G., Vitelli, M.: ‘Optimized one-cycle control in photovoltaic grid connected applications’, IEEE Trans. Aerosp. Electron. Syst., 2006, 42, (3), pp. 954–972 (doi: 10.1109/TAES.2006.248205).
-
7)
-
33. Pucci, M., Cirrincione, M.: ‘Neural MPPT control of wind generators with induction machines without speed sensors’, IEEE Trans. Ind. Electron., 2011, 58, (1), pp. 37–47 (doi: 10.1109/TIE.2010.2043043).
-
8)
-
17. Don, L., Smoot, J.: ‘A SEPIC fed buck converter’. 2012 27th Annual IEEE Applied Power Electronics Conf. and Exposition (APEC), 2012, pp. 2333–2339.
-
9)
-
16. Zengshi, C.: ‘PI and sliding mode control of a Cuk converter’, IEEE Trans. Power Electron., 2012, 27, pp. 3695–3703 (doi: 10.1109/TPEL.2012.2183891).
-
10)
-
25. Dannehl, J., Fuchs, F.W., Hansen, S., Thogersen, P.B.: ‘Investigation of active damping approaches for PI-based current control of grid-connected pulse width modulation converters with LCL filters’, IEEE Trans. Ind. Appl., 2010, 46, (4), pp. 1509–1517 (doi: 10.1109/TIA.2010.2049974).
-
11)
-
10. Chiang, S.J., Shieh, H.-J., Chen, M.-C.: ‘Modeling and control of PV charger system with SEPIC converter’, IEEE Trans. Ind. Electron., 2009, 56, (11), pp. 4344–4353 (doi: 10.1109/TIE.2008.2005144).
-
12)
-
13. Fardoun, A.A., Ismail, E.H., Sabzali, A.J., Al-Saffar, M.A.: ‘New efficient bridgeless Cuk rectifiers for PFC applications’, IEEE Trans. Power Electron., 2012, 27, pp. 3292–3301 (doi: 10.1109/TPEL.2011.2182662).
-
13)
-
28. Fang, C.C., Astrom, K.J., Ho, W.K.: ‘Refinements of the Ziegler-Nichols tuning formula’, IEE Proc. Control Theory Appl., 1991, 138, (2), pp. 111–118 (doi: 10.1049/ip-d.1991.0015).
-
14)
-
24. Rivetta, C.H., Emadi, A., Williamson, G.A., Jayabalan, R., Fahimi, B.: ‘Analysis and control of a buck DC-DC converter operating with constant power load in sea and undersea vehicles’, IEEE Trans. Ind. Appl., 2006, 42, (2), pp. 559–572 (doi: 10.1109/TIA.2005.863903).
-
15)
-
4. Hsieh, C., Chou, J.: ‘Design of optimal PID controllers for PWM feedback systems with bilinear plants’, IEEE Trans. Control Syst. Technol., 2007, 15, (6), pp. 1075–1079 (doi: 10.1109/TCST.2007.908084).
-
16)
-
8. Boyd, S., Vandenberghe, L.: ‘Convex optimization’ (Cambridge University Press, 2004).
-
17)
-
18. Mutoh, N., Ohno, M., Inoue, T.: ‘A method for MPPT control while searching for parameters corresponding to weather conditions for PV generation systems’, IEEE Trans. Ind. Electron., 2006, 53, (4), pp. 1055–1065 (doi: 10.1109/TIE.2006.878328).
-
18)
-
34. Yazdani, A., Dash, P.: ‘A control methodology and characterization of dynamics for a photovoltaic (PV) system interfaced with a distribution network’, IEEE Trans. Power Deliv., 2009, 24, (3), pp. 1538–1551 (doi: 10.1109/TPWRD.2009.2016632).
-
19)
-
11. Rashid, M.H.: ‘Power electronics, circuits devices and applications’ (Academic Press, 2006).
-
20)
-
21. Sera, D., Teodorescu, R., Hantschel, J., Knoll, M.: ‘Optimized maximum power point tracker for fast-changing environmental conditions’, IEEE Trans. Ind. Electron., 2008, 55, (7), pp. 2629–2637 (doi: 10.1109/TIE.2008.924036).
-
21)
-
31. Femia, N., Granozio, G., Petrone, G., Spagnuolo, G.: ‘Predictive & adaptive MPPT perturb and observe method’, IEEE Trans. Aerosp. Electron. Syst., 2007, 43, (3), pp. 934–950 (doi: 10.1109/TAES.2007.4383584).
-
22)
-
9. Chiu, Ch.: ‘The design and implementation of a wheeled inverted pendulum using an adaptive output recurrent cerebellar model articulation controller’, IEEE Trans. Ind. Electron., 2010, 57, (5), pp. 1814–1822 (doi: 10.1109/TIE.2009.2032203).
-
23)
-
5. Wai, R., Lee, J., Chuang, K.: ‘Real-time PID control strategy for maglev transportation system via particle swarm optimization’, IEEE Trans. Ind. Electron., 2011, 58, (2), pp. 646–629.
-
24)
-
6. Chen, W., Meng, X., Li, J.: ‘PID controller design of maglev ball system based on chaos parameters optimization’. 2010 Int. Conf. Machine Vision and Human-Machine Interface (MVHI), 24–25 April 2010, pp. 772–775.
-
25)
-
19. Cirrincione, M., Pucci, M., Vitale, G.: ‘Growing neural gas (GNG)-based maximum power point tracking for high-performance wind generator with an induction machine’, IEEE Trans. Ind. Appl., 2011, 47, (2), pp. 861–872 (doi: 10.1109/TIA.2010.2102994).
-
26)
-
1. Algreer, M., Armstrong, M., Giaouris, D.: ‘Adaptive PD + I control of a switch-mode DC-DC power converter using a recursive FIR predictor’, IEEE Trans. Ind. Appl., 2011, 47, (5), pp. 1–6 (doi: 10.1109/TIA.2011.2161856).
-
27)
-
32. Agarwal, V., Aggarwal, R., Patidar, P., Patki, Ch.: ‘A novel scheme for rapid tracking of maximum power point in wind energy generation systems’, IEEE Trans. Energy Convers., 2010, 25, (1), pp. 228–236 (doi: 10.1109/TEC.2009.2032613).
-
28)
-
30. Wu, T., Chang, Ch., Chen, Y.: ‘A fuzzy-logic-controlled single-stage converter for PV-powered lighting system applications’, IEEE Trans. Ind. Electron., 2000, 47, (2), pp. 287–296 (doi: 10.1109/41.836344).
-
29)
-
23. Fortunato, M., Giustiniani, A., Petrone, G., Spagnuolo, G., Vitelli, M.: ‘Maximum power point tracking in a one-cycle-controlled single-stage photovoltaic inverter’, IEEE Trans. Ind. Electron., 2008, 55, (7), pp. 2684–2693 (doi: 10.1109/TIE.2008.918463).
-
30)
-
3. Gaing, Z.: ‘A particle swarm optimization approach for optimum design of PID controller in AVR system’, IEEE Trans. Energy Convers., 2004, 19, (2), pp. 384–391 (doi: 10.1109/TEC.2003.821821).
-
31)
-
20. Rahim, N.A., Selvaraj, J., Krismadenata, C.: ‘Five-level inverter with dual reference modulation technique for grid-connected PV system’, Elsevier, Renew. Energy, 2010, 35, (3), pp. 712–720 (doi: 10.1016/j.renene.2009.08.021).
-
32)
-
14. Hongbo, M., Jih-Sheng, L., Quanyuan, F., Wensong, Y., Cong, Z., Zheng, Z.: ‘A novel valley-fill SEPIC-derived power supply without electrolytic capacitor for LED lighting application’, IEEE Trans. Power Electron., 2012, 27, pp. 3057–3071 (doi: 10.1109/TPEL.2011.2174446).
-
33)
-
2. Kim, K., Rao, P., Burnworth, J.A.: ‘Self-tuning of the PID controller for a digital excitation control system’, IEEE Trans. Ind. Appl., 2010, 46, (4), pp. 1518–1524 (doi: 10.1109/TIA.2010.2049631).
-
34)
-
12. Umamaheswari, M.G., Uma, G., Vijayalakshmi, K.M.: ‘Design and implementation of reduced-order sliding mode controller for higher-order power factor correction converters’, IET Power Electron., 2011, 4, pp. 984–992 (doi: 10.1049/iet-pel.2010.0286).
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