THD reduction with reactive power compensation for fuzzy logic DVR based solar PV grid connected system

Dynamic voltage restorer (DVR) is used to protect sensitive loads from voltage disturbances of the distribution generation (DG) system. In this paper, a new control approach for the 200 kW solar photovoltaic grid connected system with perturb and observe maximum power point tracking (MPPT) technique is implemented. Power quality improvement with comparison is conducted during fault with proportional integral (PI) and artificial intelligence-based fuzzy logic controlled DVR. MPPT tracks the actual variable DC link voltage while deriving the maximum power from a photovoltaic array and maintains DC link voltage constant by changing modulation index of the converter. Simulation results during fault show that the fuzzy logic based DVR scheme demonstrates simultaneous exchange of active and reactive power with less total harmonic distortion (THD) present in voltage source converter (VSC) current and grid current with fast tracking of optimum operating point at unity power factor. Standards (IEEE-519/1547), stipulates that the current with THD greater than 5% cannot be injected into the grid by any distributed generation source. Simulation results and validations of MPPT technique and operation of fuzzy logic controlled DVR demonstrate the effectiveness of the proposed control schemes.

[1]  S. Siva Nagaraju.  SIMULATION OF D-STATCOM AND DVR IN POWER SYSTEMS , 2007 .

[2]  Ernesto Ruppert Filho,et al.  Dynamic analysis of the input-controlled buck converter fed by a photovoltaic array , 2008 .

[3]  R.K. Varma,et al.  Nighttime Application of PV Solar Farm as STATCOM to Regulate Grid Voltage , 2009, IEEE Transactions on Energy Conversion.

[4]  Marcelo G. Molina,et al.  Design of improved controller for thermoelectric generator used in distributed generation , 2010 .

[5]  Geoffrey R. Walker,et al.  Cascaded DC-DC converter connection of photovoltaic modules , 2004 .

[6]  M. Rezanezhad,et al.  A new control method for Dynamic Voltage Restorer with asymmetrical inverter legs based on fuzzy logic controller , 2010, Simul. Model. Pract. Theory.

[7]  Chung-Yuen Won,et al.  A tranformerless grid-connected photovoltaic system with active and reactive power control , 2009, 2009 IEEE 6th International Power Electronics and Motion Control Conference.

[8]  Riyasat Azim,et al.  A Fuzzy Logic based Dynamic Voltage Restorer for Voltage Sag and Swell Mitigation for Industrial Induction Motor Loads , 2011 .

[9]  Atif Iqbal,et al.  A fuzzy logic control scheme for a solar photovoltaic system for a maximum power point tracker , 2010 .

[10]  S. Gonzalez,et al.  Development of a MATLAB/Simulink Model of a Single-Phase Grid-Connected Photovoltaic System , 2009, IEEE Transactions on Energy Conversion.

[11]  Peter Lund,et al.  Alternative ways for voltage control in smart grids with distributed electricity generation , 2012 .

[12]  P.L. Chapman,et al.  Comparison of Photovoltaic Array Maximum Power Point Tracking Techniques , 2007, IEEE Transactions on Energy Conversion.

[13]  Adel M. Sharaf,et al.  A fuzzy logic power tracking controller for a photovoltaic energy conversion scheme , 1992 .

[14]  Q. H. Wu,et al.  Improvement of a MPPT Algorithm for PV Systems and Its Experimental Validation , 2010 .

[15]  Rahul Dubey,et al.  Analysis of PI and PR controllers for distributed power generation system under unbalanced grid faults , 2011, 2011 International Conference on Power and Energy Systems.

[16]  Roberto F. Coelho,et al.  A MPPT approach based on temperature measurements applied in PV systems , 2010, 2010 9th IEEE/IAS International Conference on Industry Applications - INDUSCON 2010.

[17]  Akhil Gupta,et al.  Power quality improvement of solar photovoltaic transformer-less grid-connected system with maximum power point tracking control , 2014 .

[18]  Marcelo Gradella Villalva,et al.  Voltage regulation of photovoltaic arrays: small-signal analysis and control design , 2010 .

[19]  Yingtao Jiang,et al.  A Multi-Path Routing Scheme for Torus-Based NOCs , 2008 .

[20]  Rupesh G. Wandhare,et al.  A novel technique for THD control in grid connected Photovoltaic systems using step variable inductor approach , 2010, 2010 35th IEEE Photovoltaic Specialists Conference.

[21]  Tore Undeland,et al.  Power Electronics: Converters, Applications and Design , 1989 .

[22]  K. M. Tsang,et al.  Three-level grid-connected photovoltaic inverter with maximum power point tracking , 2013 .

[23]  Narain G. Hingorani,et al.  Introducing custom power , 1995 .

[24]  D. Menniti,et al.  A novel compensation approach for DC current component in a grid-connected photovoltaic generation system , 2012, 2012 IEEE Power and Energy Society General Meeting.

[25]  Seung Kyu Park,et al.  A novel maximum power point tracking control for photovoltaic power system under rapidly changing solar radiation , 2001, ISIE 2001. 2001 IEEE International Symposium on Industrial Electronics Proceedings (Cat. No.01TH8570).

[26]  Michael K. Danquah,et al.  The quintessential research world is progressively interdisciplinary , 2012 .

[27]  Mohamed Moin Hanif,et al.  Investigation to Improve the Control and Operation of a Three-phase Photovoltaic Grid-tie Inverter , 2011 .

[28]  M. Madheswaran,et al.  Performance analysis of LCL-T resonant converter with fuzzy/PID controller using state space analysis , 2011 .

[29]  S. Saravanan,et al.  Design and implementation of Maximum Power Point Tracking (MPPT) algorithm for a standalone PV system , 2012 .