LVRT capability enhancement of single-phase grid connected PV array with coupled supercapacitor

The penetration level of Photovoltaic (PV) systems in electrical grid is exceeding by a steep rate. This leads to increased vulnerability of electrical grid. Therefore, LVRT capability of PV systems has the utmost importance in term of future grid reliability. The LVRT capability of single phase inverters has been investigated in previous studies, but none of the prior investigations considered fault effects on DC side dynamics. The main contribution of this paper is to fill this gap so, in this paper grid fault effect on DC side voltage of inverter and MPPT algorithm is explored. Different reactive power injection strategies and their performance in term of the level of injected power fluctuation explored. The single phase connected PV array with supercapacitor and its control strategy proposed. Finally, the effectiveness of the proposed structure is validated by simulation carried out in MATLAB Simulink. The simulation results confirm the validity of the proposed approach.

[1]  Reza Iravani,et al.  Voltage-Sourced Converters in Power Systems: Modeling, Control, and Applications , 2010 .

[2]  G Aravindhan,et al.  Power Control Flexibilities for Grid-Connected Multi-Functional Photovoltaic Inverters , 2015 .

[3]  Frede Blaabjerg,et al.  Reactive power injection strategies for single-phase photovoltaic systems considering grid requirements , 2014, 2014 IEEE Applied Power Electronics Conference and Exposition - APEC 2014.

[4]  Huai Wang,et al.  IET Power Electronics , 2014 .

[5]  Masoud Karimi-Ghartemani,et al.  On the design of proportional resonant controllers for single-phase grid-connected inverters , 2016, 2016 12th IEEE International Conference on Control and Automation (ICCA).

[6]  H. H. Zeineldin,et al.  A Simple Approach to Modeling and Simulation of Photovoltaic Modules , 2012, IEEE Transactions on Sustainable Energy.

[7]  Ali I. Maswood,et al.  Low-voltage ride-thorough capability of photovoltaic grid-connected neutral-point-clamped inverters with active/reactive power injection , 2017 .

[8]  Rachid Outbib,et al.  General review and classification of different MPPT Techniques , 2017 .

[9]  Wei Qiao,et al.  Constant Power Control of DFIG Wind Turbines With Supercapacitor Energy Storage , 2011, IEEE Transactions on Industry Applications.

[10]  Frede Blaabjerg,et al.  Current Harmonics From Single-Phase Grid-Connected Inverters—Examination and Suppression , 2016, IEEE Journal of Emerging and Selected Topics in Power Electronics.

[11]  Remus Teodorescu,et al.  A New Single-Phase PLL Structure Based on Second Order Generalized Integrator , 2006 .

[12]  Frede Blaabjerg,et al.  Benchmarking of Grid Fault Modes in Single-Phase Grid-Connected Photovoltaic Systems , 2013, IEEE Transactions on Industry Applications.

[13]  T. Shimizu,et al.  Generalized theory of instantaneous active and reactive powers in single-phase circuits based on Hilbert transform , 2002, 2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289).

[14]  Ahmed Al-Durra,et al.  LVRT capability improvement of a grid-connected PV park by robust sliding mode control , 2015, 2015 American Control Conference (ACC).

[15]  F. Blaabjerg,et al.  A new power calculation method for single-phase grid-connected systems , 2013, 2013 IEEE International Symposium on Industrial Electronics.

[16]  Hany M. Hasanien,et al.  An Adaptive Control Strategy for Low Voltage Ride Through Capability Enhancement of Grid-Connected Photovoltaic Power Plants , 2016, IEEE Transactions on Power Systems.

[17]  Huai Wang,et al.  Wide-Scale Adoption of Photovoltaic Energy: Grid Code Modifications Are Explored in the Distribution Grid , 2015, IEEE Industry Applications Magazine.

[18]  Jae-Eon Kim,et al.  Design and control of Proportional-Resonant controller based Photovoltaic power conditioning system , 2009, 2009 IEEE Energy Conversion Congress and Exposition.

[19]  R. Teodorescu,et al.  On the Perturb-and-Observe and Incremental Conductance MPPT Methods for PV Systems , 2013, IEEE Journal of Photovoltaics.

[20]  Mohd Hasan Ali,et al.  Fuzzy logic controlled power balancing for low voltage ride-through capability enhancement of large-scale grid-connected PV plants , 2017, 2017 IEEE Texas Power and Energy Conference (TPEC).

[21]  Frede Blaabjerg,et al.  Low voltage ride-through of single-phase transformerless photovoltaic inverters , 2013, 2013 IEEE Energy Conversion Congress and Exposition.

[22]  G. Joos,et al.  Supercapacitor Energy Storage for Wind Energy Applications , 2007, IEEE Transactions on Industry Applications.