Low-voltage ride-thorough capability of photovoltaic grid-connected neutral-point-clamped inverters with active/reactive power injection

Low-voltage ride-thorough capability is among the challenges in the operation of medium- and large-scale grid-connected photovoltaic power plants (PVPPs). In addition, reactive power injection during voltage sags is required by power system operators in order to enhance the voltage of the point of common coupling. The performance of medium- and large-scale grid-connected PVPPs during these events is studied. An algorithm for the calculation of current references, in the dq -frame, during voltage sags is introduced, which considers the inverter current limitation, grid code requirements and the amount of extracted power from photovoltaic strings. The proposed algorithm uses the full current capacity of the inverter in injecting active or reactive powers to the grid during voltage sags, which leads in a better grid voltage enhancement. The performance of proposed control strategies is investigated on a 150-kVA PVPP connected to the 12.47-kV medium-voltage test-case system simulation model during different fault conditions. An experimental setup of the 3.3-kVA grid-connected three-level neutral-point-clamped inverter with a dc/dc converter illustrates and validates the performance of the controller in injecting required active/reactive power and supporting the network voltage.

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

[2]  M. Aredes,et al.  Discrete-time implementation of second order generalized integrators for grid converters , 2008, 2008 34th Annual Conference of IEEE Industrial Electronics.

[3]  Jeyraj Selvaraj,et al.  Multilevel Inverter For Grid-Connected PV System Employing Digital PI Controller , 2009, IEEE Transactions on Industrial Electronics.

[4]  J. Rodriguez,et al.  NPC multilevel multistring topology for large scale grid connected photovoltaic systems , 2010, The 2nd International Symposium on Power Electronics for Distributed Generation Systems.

[5]  Fei Wang,et al.  Design and analysis of active power control strategies for distributed generation inverters under unbalanced grid faults , 2010 .

[6]  J. Rodriguez,et al.  Cascaded H-bridge multilevel converter multistring topology for large scale photovoltaic systems , 2011, 2011 IEEE International Symposium on Industrial Electronics.

[7]  K Strunz,et al.  Modeling Guidelines and a Benchmark for Power System Simulation Studies of Three-Phase Single-Stage Photovoltaic Systems , 2011, IEEE Transactions on Power Delivery.

[8]  Juan C. Vasquez,et al.  Flexible Voltage Support Control for Three-Phase Distributed Generation Inverters Under Grid Fault , 2013, IEEE Transactions on Industrial Electronics.

[9]  F. Blaabjerg,et al.  Low-Voltage Ride-Through Capability of a Single-Stage Single-Phase Photovoltaic System Connected to the Low-Voltage Grid , 2013 .

[10]  Enrique Romero-Cadaval,et al.  Grid-Connected Photovoltaic Generation Plants: Components and Operation , 2013, IEEE Industrial Electronics Magazine.

[11]  Seyed Hossein Hosseinian,et al.  Power quality disturbance classification using a statistical and wavelet-based Hidden Markov Model with Dempster–Shafer algorithm , 2013 .

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

[13]  K. P. Vijayakumar,et al.  Reliable and Damage-Free Estimation of Resistivity of ZnO Thin Films for Photovoltaic Applications Using Photoluminescence Technique , 2013 .

[14]  D. Boroyevich,et al.  High-Temperature Hardware: Development of a 10-kW High-Temperature, High-Power-Density Three-Phase ac-dc-ac SiC Converter , 2013, IEEE Industrial Electronics Magazine.

[15]  Ali I. Maswood,et al.  Analysis of 3-level inverter scheme with DC-link voltage balancing using LS-PWM & SVM techniques , 2013, 2013 International Conference on Renewable Energy Research and Applications (ICRERA).

[16]  David Infield,et al.  New maximum power point tracker for photovoltaic systems exposed to realistic operational conditions , 2014 .

[17]  Vassilios G. Agelidis,et al.  A Three-Phase Frequency-Adaptive Phase-Locked Loop for Independent Single-Phase Operation , 2014, IEEE Transactions on Power Electronics.

[18]  Johann W. Kolar,et al.  Classification and Comparative Evaluation of PV Panel-Integrated DC–DC Converter Concepts , 2012, IEEE Transactions on Power Electronics.

[19]  Abhisek Ukil,et al.  NPC photovoltaic grid-connected inverter using proportional-resonant controller , 2014, 2014 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC).

[20]  M. Madhan,et al.  Single- and two-stage inverter-based grid-connected photovoltaic power plants with ride-through capability under grid faults , 2015, 2015 International Conference on Innovations in Information, Embedded and Communication Systems (ICIIECS).

[21]  Ali I. Maswood,et al.  NPC photovoltaic grid-connected inverter with ride-through capability under grid faults , 2015, 2015 IEEE 11th International Conference on Power Electronics and Drive Systems.

[22]  Leopoldo G. Franquelo,et al.  Grid-Connected Photovoltaic Systems: An Overview of Recent Research and Emerging PV Converter Technology , 2015, IEEE Industrial Electronics Magazine.

[23]  Josep Bordonau,et al.  Model Predictive Current Control of Grid-Connected Neutral-Point-Clamped Converters to Meet Low-Voltage Ride-Through Requirements , 2015, IEEE Transactions on Industrial Electronics.

[24]  Luis García de Vicuña,et al.  Active and Reactive Power Strategies With Peak Current Limitation for Distributed Generation Inverters During Unbalanced Grid Faults , 2015, IEEE Transactions on Industrial Electronics.

[25]  Leon M. Tolbert,et al.  Modular Cascaded H-Bridge Multilevel PV Inverter With Distributed MPPT for Grid-Connected Applications , 2015, IEEE Transactions on Industry Applications.

[26]  Salvatore Pennisi,et al.  Performance evaluation of a multistring photovoltaic module with distributed DC–DC converters , 2015 .

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

[28]  Bin Wu,et al.  Control strategies of three-phase distributed generation inverters for grid unbalanced voltage compensation , 2015 .

[29]  Weidong Xiao,et al.  Gallium-Nitride-Based Submodule Integrated Converters for High-Efficiency Distributed Maximum Power Point Tracking PV Applications , 2016, IEEE Transactions on Industrial Electronics.

[30]  Oriol Gomis-Bellmunt,et al.  Power plant control in large-scale photovoltaic plants: design, implementation and validation in a 9.4 MW photovoltaic plant , 2016 .

[31]  Weidong Xiao,et al.  A review of grid-tied converter topologies used in photovoltaic systems , 2016 .

[32]  Georgios Konstantinou,et al.  Power Balance Optimization of Cascaded H-Bridge Multilevel Converters for Large-Scale Photovoltaic Integration , 2016, IEEE Transactions on Power Electronics.

[33]  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.

[34]  Vassilios G. Agelidis,et al.  Resonant Versus Conventional Controllers in Grid-Connected Photovoltaic Power Plants Under Unbalanced Grid Voltages , 2016, IEEE Transactions on Sustainable Energy.