Document Type : Research Paper

Authors

1 1- Electrical Engineering Department, Collage of Engineering, University of Basrah, Basrah, Iraq 2- Ministry of Industry and Minerals, SDI, Mosul, Iraq

2 Electrical Engineering Department, Collage of Engineering, University of Basrah, Basrah, Iraq

3 Electrical Engineering Department, Collage of Engineering, University of Mosul, Mosul, Iraq

Abstract

The power quality (PQ) is a major issue for both electrical utilities and their customers. The nonlinear loads cause PQ problems like current harmonics, voltage harmonics, frequency deviation, voltage sag and voltage swell. A unified power quality conditioner (UPQC) is utilized in this research to minimize these PQ problems. The UPQC is made up of two active power filters (APFs), one of which is connected to the line in series and the other in parallel. The Unit Vector Template Generation (UVTG) approach is used to control the series APF, whereas the Synchronous Reference Frame (SRF) technique is used to control the shunt APF. The compensating properties of a series-shunt APFs when the loads become imbalanced have been explored. The system performance has been tested under conditions current harmonics, voltage harmonics, voltage sag, and voltage swell. The voltage harmonics are identified and reparation in a series APF using the UVTG technique, whereas the harmonics and unbalanced currents are identified and reparation in a shunt APF using the SRF method. An IEEE-519-compliant THD (Total Harmonic Distortion) of less than 5% is achieved by UPQC in simulations with unbalanced loads. The findings indicate that harmonic currents and supply voltage fluctuations were lessened by UPQC.

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Main Subjects

[1]     Y. Pal, A.Swarup, B. Singh, “A Comparison of Single-Phase p-q Theory and UVT Based Control Algorithms for Single-Phase UPQC”, Annual IEEE India Conference (INDICON), 2010.
[2]     A. N. Alsammak, H. A. Mohammed “A Comparison Study of the Most Important Types of the Flexible Alternating Current Transmission Systems (FACTs)”, Al-Rafidain Engineering Journal (AREJ), Vol. 25, No1, June 2020, pp. 49-55.
[3]     V. Khadkikar1 A. Chandra, B.N. Singh, “Generalised single-phase p-q theory for active power filtering: simulation and DSP-based experimental investigation”, IET Power Electron, Vol. 2, No. 1, pp. 67– 78, 2009.
[4]     A. A. Al-Hussein, F. R. Tahir, O. Boubaker “Chaos Elimination in Power System Using Synergetic Control Theory”, 2021 18th International Multi-Conference on Systems, (SSD), 2021.
[5]     A. J. Viji a, T. A. Victoire, ” Enhanced PLL based SRF control method for UPQC with fault protection under unbalanced load conditions“, International Journal of Electrical Power & Energy Systems, Volume 58, pp. 319-328, June 2014.
[6]     K. V. Patel, P. R. Bhavsar, “Simulation & Analysis of Unified Power Quality Conditioner (UPQC) for Power Quality Improvement”, International Journal of Advance Research in Engineering, Science & Technology (IJAREST), Volume 2, Issue 10, pp. 1-22, October 2015.
[7]     H. Fujita and H. Akagi, “The unified power quality conditioner: The integration of series- and shunt-active filters” IEEE Trans. Power Electron., vol. 13, no. 2, pp. 315–322, 1998.
[8]     M. Basu, S. P. Das, G. K. Dubey,  “Performance Study of UPQC-Q for Load Compensation and Voltage Sag Mitigation”, IEEE 2002 28th Annual Conference of the Industrial Electronics Society. IECON 02, pp. 698-703, 2002.
[9]     Y. Y. Kolhatkar, R. R. Errabelli, S. P. Das,” A Sliding Mode Controller Based Optimum UPQC with Minimum VA Loading”, IEEE Power Engineering Society General Meeting, 2005.
[10]  J. A. Muñoz, J. R. Espinoza, L. A. Moran, C. R. Baier, ”Design of a Modular UPQC Configuration Integrating a Components Economical Analysis”, IEEE TRANSACTIONS ON POWER DELIVERY, VOL. 24, NO. 4, OCTOBER 2009.
[11]  V. Khadkikar, A. Chandra,” UPQC-S: A Novel Concept of Simultaneous Voltage Sag/Swell and Load Reactive Power Compensations Utilizing Series Inverter of UPQC”, IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 26, NO. 9, SEPTEMBER 2011.
[12]  A. K. Panda, N. Patnaik, R. Patel,” Power quality enhancement with PAC-SRF based Single Phase UPQC under non-ideal source voltage”, Annual IEEE India Conference (INDICON), pp. 1-5,  Dec. 2015.
[13]  S. Devassy, B. Singh, “Modified p-q Theory Based Control of Solar PV Integrated UPQC-S”, IEEE Industry Applications Society Annual Meeting, Oct. 2016.
[14]  J. Ye, H. B. Gooi, F. Wu, “Optimization of the Size of UPQC System Based on Data-Driven Control Design”, IEEE Power & Energy Society General Meeting, pp. 1-10, July 2017.
[15]  A. Patel, H. D. Mathur, S. Bhanot, ”Improving Performance of UPQC-DG for Compensation of Unbalanced Loads”, 8th IEEE India International Conference on Power Electronics (IICPE), Dec. 2018.
[16]  A. Szromba, B. Syso, “Unified Power Quality Conditioner Controlled With the Use of Load Equivalent Conductance Signal”, 15th Selected Issues of Electrical Engineering and Electronics (WZEE), Dec. 2019.
[17]  A. K. Yadav, P. Tiwari, R. maurya, “Power Quality Conditioning in multifeeder using MC-UPQC”, IEEE International Conference on Electrical and Electronics Engineering (ICE3), pp. 545-649, Feb. 2020.
[18]  S. K. Dash, P. K. Ray,” A New PV-Open-UPQC Configuration for Voltage Sensitive Loads utilizing novel Adaptive Controllers”, IEEE Transactions on Industrial Informatics, Volume: 17, Issue: 1, 2021.
[19]  M. P. Behera, O. Tripathy, P. K. Ray,  “UPQC based Grid-Connected Photovoltaic System with Fuzzy Logic Controller” IEEE 3rd International Conference on Energy, Power and Environment: Towards Clean Energy Technologies, 2021.
[20]  L. Meng, Lan Ma, W. Zhu, H. Yan, T. Wang, W. Mao, Xiaoqiong He, Z. Shu, “Control Strategy of Single-Phase UPQC for Suppressing the Influences of Low-Frequency DC-Link Voltage Ripple”, IEEE Transactions on Power Electronics, Volume: 37, Issue: 2, 2022.
[21]  R. J. Kadam, K. A. Mulani, V.B.Waghmare, “Voltage Distortion at Distribution side reduced by Modified UPQC”, 3rd IEEE International Conference for Convergence in Technology (I2CT),pp. 1-4, Apr. 2018.
[22]  V. Khadkikar,” Enhancing Electric Power Quality Using UPQC: A Comprehensive Overview”, IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 27, NO. 5, pp. 2284-2297, MAY 2012.
[23]  S. K. Yadav, A. Patel, H. D. Mathur, “Comparison of Power Losses for Different Control Strategies of UPQC”, IEEE 17th India Council International Conference (INDICON), Dec. 2020.
[24]  A. Y. Qasim, F. R. Tahir, A. N. Alsammak, “Voltage Sag, Voltage Swell and Harmonics Reduction Using Unified Power Quality Conditioner (UPQC) Under Nonlinear Loads”, Iraqi Journal for Electrical and Electronic Engineering (IJEEE), Vol. 17,  Issue 2 , pp. 140-150, December 2021.
[25]  V. Khadkikar, P. Aganval, A. Chandra, A.O. Bany, T.D. Nguyen,” A Simple New Control Technique For Unified Power Quality Conditioner (UPQC)”, 11th IEEE International Conference on Harmonics and Quality of Power, pp.289-293, Sept. 2004.
[26]  S. Srinath, M. P. Selvan, K. Vinothkumar, “Comparative Evaluation of Performance of Different Control Strategies on UPQC Connected Distribution System”, 5th IEEE International Conference on Industrial and Information Systems, ICIIS, pp. 502-507, Jul. 2010.
[27]  V. Khadkikar, A. Chandra, A. O. Barry, T. D. Nguyen,” Application of UPQC to Protect a Sensitive Load on a Polluted Distribution Network”, IEEE Power Engineering Society General Meeting (PES), June 2006.
[28]  M. Kesler, E. Ozdemir,” Synchronous-Reference-Frame-Based Control Method for UPQC Under Unbalanced and Distorted Load Conditions”, IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 58, NO. 9, pp. 3967-3975, SEPTEMBER 2011.
[29]  A. Patel, P. Chaturvedi, “Performance of SRF-UVTG based UPQCDG for Integration of Solar PV with Non-linear Loads”, IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), Dec. 2016.
[30]  S. Shamshul Haq, D. Lenine, S. V. N. L. Lalitha, ” Performance Analysis of Hysteresis Voltage and Current Control of Three Phase-Four Wire UPQC”, IEEE National Power Engineering Conference, March 2018.