Two-stage grid-connected inverter for PV systems

In this study, a two-stage grid-connected inverter is proposed for photovoltaic (PV) systems. The proposed system consist of a single-ended primary-inductor converter (SEPIC) converter which tracks the maximum power point of the PV system and a three-phase voltage source inverter (VSI) with LCL filter to export the PV supplied energy to the grid. The incremental conductance (IC) method with novel variable step algorithm is used as maximum power point tracking algorithm. Thus, tracking speed and accuracy is improved. A sliding-mode control (SMC) strategy is used to control the inverter stage. Obtained simulation results show that proposed system tracks the maximum power point of the PV system and injects sinusoidal currents to the grid.

[1]  Mohamed M. Algazar,et al.  Maximum Power Point Tracking Using Fuzzy Logic Control , 2011 .

[2]  J.W. Kolar,et al.  A Modified Direct Power Control Strategy Allowing the Connection of Three-Phase Inverters to the Grid Through $LCL$ Filters , 2005, IEEE Transactions on Industry Applications.

[3]  Frede Blaabjerg,et al.  Renewable energy resources: Current status, future prospects and their enabling technology , 2014 .

[4]  Sachin Jain,et al.  An Integrated Control Algorithm for a Single-Stage PV Pumping System Using an Open-End Winding Induction Motor , 2016, IEEE Transactions on Industrial Electronics.

[5]  Mohd Amran Mohd Radzi,et al.  A current and future study on non-isolated DC–DC converters for photovoltaic applications , 2013 .

[6]  Yan Zhou,et al.  Parameter Design of a Two-Current-Loop Controller Used in a Grid-Connected Inverter System With LCL Filter , 2009, IEEE Transactions on Industrial Electronics.

[7]  Barry W. Williams,et al.  DC-to-DC Converter With Low Input Current Ripple for Maximum Photovoltaic Power Extraction , 2015, IEEE Transactions on Industrial Electronics.

[8]  Vassilios G. Agelidis,et al.  Single- and Two-Stage Inverter-Based Grid-Connected Photovoltaic Power Plants With Ride-Through Capability Under Grid Faults , 2015, IEEE Transactions on Sustainable Energy.

[9]  Fengjiang Wu,et al.  Analysis and Solution of Current Zero-Crossing Distortion With Unipolar Hysteresis Current Control in Grid-Connected Inverter , 2013, IEEE Transactions on Industrial Electronics.

[10]  Necmi Altin,et al.  Three-phase three-level grid interactive inverter with fuzzy logic based maximum power point tracking controller , 2013 .

[11]  Saad Mekhilef,et al.  Simulation and Hardware Implementation of Incremental Conductance MPPT With Direct Control Method Using Cuk Converter , 2011, IEEE Transactions on Industrial Electronics.

[12]  Necmi Altin,et al.  Single stage three level grid interactive MPPT inverter for PV systems , 2014 .

[13]  Bikash Kumar Sahu.  A study on global solar PV energy developments and policies with special focus on the top ten solar PV power producing countries , 2015 .

[14]  Malabika Basu,et al.  Photovoltaic supplied grid-tie three-phase inverter with active power injection and reactive harmonic current compensation capability , 2016, IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society.

[15]  Necmi Altin,et al.  Sliding-mode and proportional-resonant based control strategy for three-phase grid-connected LCL-filtered VSI , 2016, IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society.

[16]  Necmi Altin,et al.  PV Supplied Single Stage MPPT Inverter for Induction Motor Actuated Ventilation Systems , 2014 .

[17]  Harun Özbay,et al.  SMC-DPC based active and reactive power control of grid-tied three phase inverter for PV systems , 2017 .

[18]  Malabika Basu,et al.  Nonlinear control methods for single-ended primary-inductor power converters , 2017, IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society.

[19]  Necmi Altin,et al.  Fuzzy logic based MPPT controller for high conversion ratio quadratic boost converter , 2017 .

[20]  M. Nasir Uddin,et al.  Fuzzy-Logic-Controller-Based SEPIC Converter for Maximum Power Point Tracking , 2012, IEEE Transactions on Industry Applications.

[21]  J.W. Kolar,et al.  A modified direct power control strategy allowing the connection of three-phase inverter to the grid through LCL filters , 2005, Fourtieth IAS Annual Meeting. Conference Record of the 2005 Industry Applications Conference, 2005..

[22]  Necmi Altin,et al.  A modified Lyapunov-function based control strategy for three-phase grid-connected VSI with LCL filter , 2016, IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society.

[23]  Tao Liu,et al.  A Sliding-Mode Controller With Multiresonant Sliding Surface for Single-Phase Grid-Connected VSI With an LCL Filter , 2013, IEEE Transactions on Power Electronics.

[24]  Nasrudin Abd Rahim,et al.  Fuzzy-Logic-Controller-Based SEPIC Converter for Maximum Power Point Tracking , 2014 .

[25]  Necmi Altin,et al.  Sliding-Mode Control for Single-Phase Grid-Connected $\mbox{LCL}$-Filtered VSI With Double-Band Hysteresis Scheme , 2016, IEEE Transactions on Industrial Electronics.