Extended Reference Signal Generation Scheme for Integration of Unified Power Quality Conditioner in Grid-connected Photovoltaic System

Abstract—This article proposes an extended reference signal generation scheme for the integration of a three-phase four-wire unified power quality conditioner in a grid-connected photovoltaic system. The photovoltaic–unified power quality conditioner provides compensation against voltage harmonics, current harmonics, and voltage interruption for the whole day. It also transmits the power generated in the photovoltaic system to the load. The proposed topology utilizes the green energy source with an energy storage unit to address the DC-link voltage requirement of the shunt and series active power filters of the unified power quality conditioner. The high-selectivity filter is used in the shunt inverter control scheme for reference current generations. The series inverter in the unified power quality conditioner is used for supplying a part of reactive power required by the load and for compensation of sag/swell, supply voltage unbalance, and distortions. This is achieved by controlling the phase angle and magnitude of series-injected voltage called the power angle control method. The simulation and experimental studies are carried out to validate the effectiveness of the proposed photovoltaic-based three-phase four-wire unified power quality conditioner.

[1]  Sule Ozdemir,et al.  3-Phase 4-leg unified series–parallel active filter system with ultracapacitor energy storage for unbalanced voltage sag mitigation , 2013 .

[2]  M. K. Mishra,et al.  Mitigation of Voltage Sags With Phase Jumps by UPQC With PSO-Based ANFIS , 2011, IEEE Transactions on Power Delivery.

[3]  I. Jacob Raglend,et al.  Universal power line manager for wind turbine generator connected to microgrid , 2013 .

[4]  Ali Emadi,et al.  Series-Parallel Active Filter/Uninterruptible Power Supply System , 2004 .

[5]  Shahrokh Saadate,et al.  New control approach for four-wire active power filter based on the use of synchronous reference frame , 2005 .

[6]  M.K. Mishra,et al.  Design of passive filter components for switching band controlled DVR , 2008, TENCON 2008 - 2008 IEEE Region 10 Conference.

[7]  Jiann-Fuh Chen,et al.  Novel High Step-Up DC–DC Converter for Distributed Generation System , 2013, IEEE Transactions on Industrial Electronics.

[8]  Jang-Hwan Kim,et al.  A novel three-phase line-interactive UPS system with parallel-series active power-line conditioning capabilities using AC line reactor , 2004, 30th Annual Conference of IEEE Industrial Electronics Society, 2004. IECON 2004.

[9]  Mahesh Kumar Mishra,et al.  Minimization of VA loading of Unified Power Quality Conditioner (UPQC) , 2009, 2009 International Conference on Power Engineering, Energy and Electrical Drives.

[10]  Ambrish Chandra,et al.  UPQC-S: A Novel Concept of Simultaneous Voltage Sag/Swell and Load Reactive Power Compensations Utilizing Series Inverter of UPQC , 2011, IEEE Transactions on Power Electronics.

[11]  Kamal Al-Haddad,et al.  A review of three-phase improved power quality AC-DC converters , 2003, IEEE Transactions on Industrial Electronics.

[12]  Hui Wang,et al.  Advances and trends of energy storage technology in Microgrid , 2013 .

[13]  Philippe Poure,et al.  New digital reference current generation for shunt active power filter under distorted voltage conditions , 2009 .

[14]  I.H. Altas,et al.  A Photovoltaic Array Simulation Model for Matlab-Simulink GUI Environment , 2007, 2007 International Conference on Clean Electrical Power.

[15]  M.K. Mishra,et al.  Design and analysis of voltage source inverter for active compensators to compensate unbalanced and non-linear loads , 2007, 2007 International Power Engineering Conference (IPEC 2007).

[16]  Patricio Salmerón,et al.  A Control Strategy for Hybrid Power Filter to Compensate Four-Wires Three-Phase Systems , 2010, IEEE Transactions on Power Electronics.

[17]  Malabika Basu,et al.  Investigation on the performance of UPQC-Q for voltage sag mitigation and power quality improvement at a critical load point , 2008 .

[18]  P. F. Donoso-Garcia,et al.  A line-interactive UPS system implementation with series-parallel active power-line conditioning for three-phase, four-wire systems , 2004 .

[19]  Man-Chung Wong,et al.  Analysis and control of UPQC and its DC-link power by use of p-q-r instantaneous power theory , 2004, Proceedings. 2004 First International Conference on Power Electronics Systems and Applications, 2004..

[20]  Vijayakumar Madhaiyan,et al.  Experimental Verification of Photovoltaic-based Three-phase Four-wire Series Hybrid Active Power Filter , 2014 .

[21]  K. Nam,et al.  An instantaneous phase angle detection algorithm under unbalanced line voltage condition , 1999, 30th Annual IEEE Power Electronics Specialists Conference. Record. (Cat. No.99CH36321).

[22]  Hirofumi Akagi,et al.  Modern active filters and traditional passive filters , 2006 .

[23]  Dong-Seok Hyun,et al.  A new control scheme of unified power quality compensator-Q with minimum power injection , 2004, 30th Annual Conference of IEEE Industrial Electronics Society, 2004. IECON 2004.

[24]  Metin Kesler,et al.  A novel control method for unified power quality conditioner (UPQC) under non-ideal mains voltage and unbalanced load conditions , 2010, 2010 Twenty-Fifth Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[25]  Jung-Min Kwon,et al.  Photovoltaic Power Conditioning System With Line Connection , 2006, IEEE Transactions on Industrial Electronics.

[26]  P. Poure,et al.  Study and experimental validation of harmonic isolation based on High Selectivity Filter for three-phase active filter , 2008, 2008 IEEE International Symposium on Industrial Electronics.

[27]  Patricia Liliana Arnera,et al.  Hybrid Power Filter to Enhance Power Quality in a Medium-Voltage Distribution Network , 2009, IEEE Transactions on Industrial Electronics.

[28]  Malabika Basu,et al.  A 12-kVA DSP-Controlled Laboratory Prototype UPQC Capable of Mitigating Unbalance in Source Voltage and Load Current , 2010, IEEE Transactions on Power Electronics.

[29]  Patricio Salmer.  A Control Strategy for Hybrid Power Filter to Compensate Four-Wires Three-Phase Systems , 2010 .