The Research of Control Strategy for Three-Phase Photovoltaic Grid-Connected VSI Using Space Vector Pulse Width Modulation and P-Q Theory

Abstract:

This paper investigates the operation of a PV unit which is connected via a three-phase voltage-source inverter to the grid. The PV grid-connected control system is mainly related to a few key issues that are characteristics of photovoltaic cells, maximum power point tracking and grid-connected control of three-phase inverter. The control strategy of the three-phase PV grid-connected system is analyzed and studied by simulative experiment in this paper. A mathematical model of solar cells is established. Then the algorithms based on perturb & observe to track maximum power point is used. The structure of three-phase PV grid-connected system is introduced, and the current control method with Space Vector pulse width modulation (SVPWM) is examined and compared to other current control methods. The p-q theory is used to achieve uninterrupted compensation of the reactive power of the system. Simulative results on Matlab/Simulink software illustrate the reliability and superiority of this control strategy.

• Periodical: Advanced Materials Research (Volumes 608-609)
• Pages: 38-41
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.608-609.38
• Online since: December 2012
• Authors: Qi Ming Cheng, Xiao Qing Hu, Kai Wu, Yuan Fei Bai, Jin Bin Zhao
• Keywords: Maximum Power Point Tracking (MPPT), Perturb & Observe Method, Solar Cell Modeling, Space Vector Pulse Width Modulation (SVPWM), Two Closed Loop Control

References

[1] Ning Duo and Gong Jichen. The future and significance of the development of the solar energy in photovotogic area. Journal of Northwest Institute of Light Industry, vol.20, no.1(2002), pp.82-84.

[2] Su Jianhui, Yu Shijie and Zhao Wei. Investigation on engineering analytical model of silicon solar cells. Acta Energiae Solaris Sinica, vol.22, no.4 (2001), pp.234-236.

[3] Wang Fei, Yu Shijie and Su Jianhui. Research on photovoltaic grid-connected power system. Transactions of China Electrotechnical Society, vol.20, no.5 (2005), pp.87-91.

[4] Xu Pengwei, Liu Fei and Liu Bangyin. Analysis, comparison and improvement of several MPPT methods for PV system. Power Electronics, vol.41, no.5 (2007), pp.3-5.

[5] Qiu Peichun, Ge Baoming and Bi Daqiang. MPPT control for PV power generation system based on P&O algorithms and quadratic interpolation. Power System Protection and Control, 2011, vol.39, no.4(2011), pp.62-67.

DOI: 10.1109/powercon.2010.5666732

[6] L.S. Czarnecki. Instantaneous reactive Power p-q Theory and Power Properties of Three-Phase Systems. IEEE Trans. Power Delivery, vol.21, no.1 (2006), pp.362-368.

DOI: 10.1109/tpwrd.2005.852348

[7] J.M. Carrasco and B.E. Galvan. Power-electronics systems for the grid integration of renewable energy sources: a survey. IEEE Trans. Industrial Electronics, vol.53, no.5 (2006), pp.1184-1194.

DOI: 10.1109/tie.2006.878356

[8] M.P. Kazmierkowski and L. Malesani. Current control techniques for three-phase voltage-source PWM converters: a survey. IEEE Trans. Industrial Electronics, vol.45, no.10 (1998), pp.691-703.

DOI: 10.1109/41.720325