CONTROL STAND ALONE THREE–PHASE PHOTOVOLTAIC SYSTEM
The purpose of PV inverters control is to inversely transform the DC output electric power of PV-array into AC electric power with voltage amplitude, frequency, phase angle are achieved the standard of AC power supplied to the load. A kind of three-phase Z-Source inverter operational principle is analyzed in this paper. Formulas for the design of main parameters under the control of constant duty cycle of shoot-through switching state are established and combined with the PSO control to stick to the maximum power point of the Photovoltaic under shade conditions. Then the simulation models of SVPWM with shoot-through zero vectors are established by using Matlab/Simulink in order to control the switches of Z-Source inverter on and off. Simulation results show that the theoretical analysis and the simulation models are validity.
Nicola Femia, Giovanni Petrone, Giovanni Spagnuolo and Massimo Vitelli, “Power electronics and Control Techniques for Maximum energy harvesting in Photovoltaic systems”. International Standard Book Number-13: 978-1-4665-0691-6, 2013.
Chao, K.-H. and C.-J. Li., “An intelligent maximum power point tracking method based on extension theory for PV systems”. Expert Systems with Applications, 37(2), pp. 1050-1055, 2010.
Patin, N., “DC/AC Converters. Power Electronics Applied to Industrial Systems and Transports”, Volume 2, Elsevier, pp.35-100, 2015.
Ramdan B. A. Koad, Ahmed. F. Zobaa, “Comparison between the Conventional Methods and PSO Based MPPT Algorithm for Photovoltaic Systems”. International Journal of Electrical, Robotics, Electronics and Communications Engineering, vol 8, no 4, 2014.
Rey-Boué, A. B., et al., “An integrative approach to the design methodology for 3 phase power conditioners in Photovoltaic Grid-Connected systems”. Energy Conversion and Management, 56, pp. 80-95, 2012.
Rosa A. Mastromauro, Marco Liserre, Tamas Kerekes, “A Single-Phase Voltage-Controlled Grid-Connected Photovoltaic System With Power QualityConditioner Functionalit”. IEEE Transactions on Industrial Electronics, 56(11), pp. 4436-4444, 2009.
Ahmad, M., “High Performance AC Drives Modeling Analysis and Control”, Springer, ISBN 978-3-642-13149-3, London, UK, 2010.
Alberto Pigazo, Marco Liserre, Rosa A. Mastromauro, “Wavelet-Based Islanding Detection in Grid-Connected PV Systems”. IEEE Transactions on Industrial Electronic, 56(11), pp. 4445-4455, 2009.
Salah, L. and B. Tahar, “SVPWM Performance of PMSM Variable Speed and Impact of Diagnosis Sensors Faults”. Energy Procedia, 74, pp. 679-689, 2015.
Sastry, J., et al., “Evaluation of cascaded H-bridge inverter for utility-scale photovoltaic systems”. Renewable Energy, 69, pp. 208-218, 2014.
Yang, Y. and F. P. Zhao, “Adaptive Perturb and Observe MPPT Technique for Grid-Connected Photovoltaic Inverters”. Procedia Engineering, 23, pp. 468-473, 2011.
Yu G.J, Jung Y.S, Choi J.Y, “A novel two mode MPPT control algorithm based on comparative study of existing algorithms”. Solar Energy, 76(4), pp. 455-463, 2004.