Control of Inverter-Interfaced Distributed Generation Units for Voltage and Current Harmonics Compensation in Grid-Connected Microgrids

Document Type : Research paper

Authors

1 Department of Electrical Engineering, University of Birjand, Birjand, Iran

2 Department of Electrical and computer Engineering, University of Birjand, Birjand, Iran.

3 Department of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran

Abstract

In this paper, a new approach is proposed for voltage and current harmonics compensation in grid-connected microgrids (MGs). If sensitive loads are connected to the point of common coupling (PCC), compensation is carried out in order to reduce PCC voltage harmonics. In absence of sensitive loads at PCC, current harmonics compensation scenario is selected in order to avoid excessive injection of harmonics by the main grid. In both scenarios, compensation is performed by the interface converters of distributed generation (DG) units. Also, to decrease the asymmetry among phase impedances of MG, a novel structure is proposed to generate virtual impedance. At fundamental frequency, the proposed structure for the virtual impedance improves the control of the fundamental component of power, and at harmonic frequencies, it acts to adaptively improve nonlinear load sharing among DG units. In the structures of the proposed harmonics compensator and the proposed virtual impedance, a self-tuning filter (STF) is used for separating the fundamental component from the harmonic components. This STF decreases the number of phase locked loops (PLLs). Simulation results in MATLAB/SIMULINK environment show the efficiency of the proposed approach in improving load sharing and decreasing voltage and current harmonics.

Keywords

Main Subjects

References

[1]     IEEE Standard 1547.4-2011, “IEEE guide for design, operation, and integration of distributed resource island systems with electric power systems”, 2011.
[2]     M. Allahnoori, Sh. Kazemi, H. Abdi and R. Keyhani, “Reliability assessment of distribution systems in presence of microgrids considering uncertainty in generation and load demand”, Journal of Operation and Automation in Power Engineering, vol. 2, no. 2, pp. 113-120, 2014.
[3]     S. Chowdhury, S.P. Chowdhury and P. Crossley, Microgrids and active distribution networks, Published by The Institution of Engineering and Technology (IET), London, United Kingdom, 2009.
[4]     A. Mokari, H. Seyedi, B. Mohammadi-Ivatloo and S. Ghasemzadeh, “An improved under-frequency load shedding scheme in distribution networks with distributed generation”, Journal of Operation and Automation in Power Engineering, vol. 2, no. 1, pp.  2-31, 2014.
[5]     R. C. Dugan, M. F. McGranaghan, S. Santoso and H. W. Beaty, Electrical power systems quality, (2nded), New York: McGraw-Hill, 2003.
[6]     A. Tuladhar, H. Jin, T. Unger and K. Mauch, “Parallel operation of single phase inverter modules with no control interconnections”, in Proceedings of the Twelfth annual Applied Power Electronics Conference and Exposition,  Atlanta, GA, pp. 94-100, 1997.
[7]     J. M. Guerrero, J. Matas, L. G. de Vicuña, M. Castilla and J. Miret, “decentralized control for parallel operation of distributed generation inverters using resistive output impedance”, IEEE Transaction on Industrial Electronics, vol. 54, no. 2, pp. 994-1004, 2007.
[8]     P. Sreekumar and V. Khadkikar, “A new virtual harmonic impedance scheme for harmonic power sharing in an islanded microgrid”, IEEE Transaction on Power Delivery, vol. 31, no. 3, pp. 936-945, 2015.
[9]     M. Guerrero, J. Matas, L. G. Vicuna, M. Castilla and J. Miret, “Wireless control strategy for parallel operation of distributed generation inverters,” IEEE Transaction on Industrial Electronics, vol. 53, no. 5, pp. 1461-1470, 2006.
[10]         D. De and V. Ramanarayanan, “decentralized parallel operation of inverters sharing unbalanced and nonlinear loads”, IEEE Transaction on Power Electronics, vol. 25, no. 12, pp. 3015-3025, 2010.
[11]         M. Savaghebi, J.C. Vesquez, A. Jalilian, J.M. Guerrero and T. L. Lee, “Selective compensation of voltage harmonics in grid-connected microgrids,” International Journal of Mathematics and Computers in Simulation,vol. 91, no. 6, pp. 211-228. 2013.
[12]         M. Cirrincione, M. Pucci and G. Vitale, “A single-phase dg generation unit with shunt active power filter capability by adaptive neural filtering”, IEEE Transactions on Industrial Electronics, vol. 55, no. 5, pp. 2093-2110, 2008.
[13]         W. Al-Saedi, S. W. Lachowicz, D. Habibi and O. Bass, “Power quality enhancement in autonomous microgrid operation using particle swarm optimization,” International Journal of Electrical Power & Energy Systems, vol. 42, no. 1, pp. 139-149, 2012.
[14]         W. Al-Saedi, S. W. Lachowicz, D. Habibi and O. Bass, “Voltage and frequency regulation based DG unit in an autonomous microgrid operation using Particle Swarm Optimization,” International Journal of Electrical Power & Energy Systems, vol. 53, no. 4, pp. 742-751, 2013.
[15]         M. Prodanovic, K. D. Brabandere, J. V. Keybus, T. C. Green and J. Driesen, “Harmonic and reactive power compensation as ancillary services in inverter-based distributed generation”, IET Proceedings on Generation, Transmission and Distribution, vol. 1, no. 3, pp. 432-438, 2007.
[16]         J. He, Y. W. Li and M.S. Munir, “A flexible harmonic control approach through voltage controlled dg-grid interfacing converters”, IEEE Transaction on Industrial Electronics, vol. 59, no. 1, pp. 444-455, 2012.
[17]         X. Wang, F. Blaabjerg and Z. Chen, “Autonomous control of inverter-interfaced distributed generation units for harmonic current filtering and resonance damping in an islanded microgrid,” IEEE Transactions on Industry Applications, vol. 50, no. 1, pp. 452-461, 2014.
[18]         T.L. Lee and P.T. Cheng, “Design of new cooperative harmonic filtering strategy for distributed generation interface converters in an islanding network”, IEEE Transaction on Power Electronics, vol. 22, no. 5, pp. 1919-1927, 2007.
[19]         M. Savaghebi, J. M. Guerrero, A. Jalilian, J.C. Vasquez and Tzung-Lin Lee, “Hierarchical control scheme for voltage harmonics compensation in an islanded droop-controlled microgrid,” Proceedings of the IEEE Power Electronic and Drive Systems, Singapore, pp. 89-94, 2011.
[20]         M. M. Hashempour, M. Savaghebi, J.C. Vasquez and J. M. Guerrero, “A control architecture to coordinate distributed generators and active power filters coexisting in a microgrid”, IEEE Transaction on Smart Grid, vol. PP, no. 99, pp. 1-12, 2015.
[21]         S. Anwar , A. Elrayyah and Y. Sozer, “Efficient single phase harmonics elimination method for microgrid operations”, IEEE Transaction on Industry Applications, vol. 51, no. 4, pp. 3394-3403, 2015.
[22]         J.M. Guerrero, M. Chandorkar, T.L. Lee and P.C. Loh, “Advanced control architectures for intelligent microgrids - part ii: power quality, energy storage, and ac/dc microgrids,” IEEE Transaction on Industrial Electronics, vol. 60, no. 4, pp. 1263-1270, 2013.
[23]         H. Akagi, E.H. Watanabe and M. Aredes, Instantaneous power theory and applications to power conditioning, Wiley-IEEE Press, 2007.
[24]         J.M. Guerrero, J.C. Vasquez, J. Matas, L.G. de Vicuna and M. Castilla, “Hierarchical control of droop-controlled ac and dc microgrids - a general approach toward standardization”, IEEE Transactions on Industrial Electronics, vol. 58, no. 1, pp. 158-172, 2011.
[25]         F. Blaabjerg, R. Teodorescu, M. Liserre and A.V. Timbus, “Overview of control and grid sync hronization for distributed power generation systems”, IEEE Transactions on Industrial Electronics, vol. 53, no. 5, pp. 1398-1409, 2006.
[26]         P.C. Loh and D.G. Holmes, “Analysis of multiloop control strategies for lc/cl/lcl filtered voltage sourse and current source inverters”, IEEE Transactions on Industrial Applications, vol. 41, no. 2, pp. 644-654, 2005.
[27]         H. Song, H. Park and K. Nam, “An instantaneous phase angle detection algorithm under unbalanced line voltage condition,” in Proceedings of the 30th Annual IEEE Power Electronics Specialists Conference, Charleston, SC, pp. 533-537, 1999.
[28]         M. Abdusalam, P. Poure, S. Karimi and S. Saadate, “New digital reference current generation for shunt active power filter under distorted voltage conditions”, Electric Power Systems Research, vol. 79, no. 2, pp. 759-765, 2009.
[29]         R. Ghanizadeh and M. Ebadian, “Improving the performance of UPQC under unbalanced and distortional load conditions: A new control method”, Journal of Artificial Intelligence & Data Mining, vol. 3, no. 2, pp. 225-234, 2015.
[30]         M. Ebadian, M. Talebi and R. Ghanizadeh, “A new approach based on instantaneous power theory for improving the performance of UPQC under unbalanced and distortional load conditions”, Automatika - Journal for Control, Measurement, Electronics, Computing and Communications, vol. 56, no. 2, pp. 52-64, 2015.
[31]         J. He and Y. W. Le, “Analysis and design of interfacing inverter output virtual impedance in a low voltage microgrid,” Proceedings of the IEEE Energy Conversion Congress and Exposition, Atlanta, GA, pp. 2847-2864, 2010.
[32]         IEEE Standard 1459-2010, IEEE standard definitions for the measurement of electric power quantities under sinusoidal, no sinusoidal, balanced or unbalanced conditions, 2010.

Files

History

  • Receive Date: 04 September 2015
  • Revise Date: 08 November 2015
  • Accept Date: 09 June 2016

Share

How to cite

Statistics