RTDS hardware implementation and simulation of SHAF for mitigation of harmonics using p-q control strategy with PI and fuzzy logic controllers

Abstract

The main objective of this paper is to develop PI and fuzzy controllers to analyze the performance of instantaneous real active and reactive power (p-q) control strategy for extracting reference currents of shunt active filters (SHAFs) under balanced, unbalanced, and balanced non-sinusoidal conditions. When the supply voltages are balanced and sinusoidal, both controllers converge to the same compensation characteristics. However, if the supply voltages are distorted and/or unbalanced sinusoidal, these controllers result in different degrees of compensation in harmonics. The p-q control strategy with PI controller is unable to yield an adequate solution when source voltages are not ideal. Extensive simulations were carried out with balance, unbalanced, and non-sinusoidal conditions. Simulation results validate the superiority of fuzzy logic controller over PI controller. The three-phase four-wire SHAF system is also implemented on a real-time digital simulator (RTDS hardware) to further verify its effectiveness. The detailed simulation and RTDS hardware results are included.

Keywords

harmonic compensation / shunt active filter (SHAF) / p-q control strategy / PI controller / fuzzy logic controller / real-time digital simulator (RTDS hardware)

References

[1] Akagi H, Kanazawa Y, Nabae A. Instantaneous reactive power compensators comprising switching devices without energy storage components. IEEE Transactions on Industry Applications, 1984, IA-20(3): 625–630

[2] Gyugyi L, Strycula E C. Active AC power filters. In: Proceedings of IEEE/IAS Annual Meeting. 1976, 529–535

[3] Mikkili S, Panda A K. PI and fuzzy logic controller based 3-phase 4-wire shunt active filters for the mitigation of current harmonics with the I_d-I_q control strategy. Journal of power Electronics, 2011, 11(6): 914–921

[4] Akagi H. New trends in active filters for power conditioning. IEEE Transactions on Industry Applications, 1996, 32(6): 1312–1322

[5] Mikkili S, Panda A K. Fuzzy logic controller based 3-ph 4-wire SHAF for current harmonics compensation with I_d-I_q control strategy using simulation and RTDS hardware. In: Proceedings of the Ninth IEEE International Conference on Power Electronics and Drive Systems. 2011, 430–435

[6] Akagi H, Watanabe E H, Aredes M. Instantaneous Power Theory and Applications to Power Conditioning. New Jersey: IEEE Press/Wiley Interscience, 2007

[7] Peng F Z, Ott G W Jr, Adams D J. Harmonic and reactive power compensation based on the generalized instantaneous reactive power theory for three-phase four-wire systems. IEEE Transactions on Power Electronics, 1998, 13(6): 1174–1181

[8] Montero M I M, Cadaval E R, Gonzalez F B. Comparison of control strategies for shunt active power filters in three-phase four-wire systems. IEEE Transactions on Power Electronics, 2007, 22(1): 229–236

[9] Aredes M, Hafner J, Heumann K. Three-phase four-wire shunt active filter control strategies. IEEE Transactions on Power Electronics, 1997, 12(2): 311–318

[10] Rodriguez P, Candela J I, Luna A, Asiminoaei L, Teodorescu R, Blaabjerg F. Current harmonics cancellation in three-phase four-wire systems by using a four-branch star filtering topology. IEEE Transactions on Power Electronics, 2009, 24(8): 1939–1950

[11] Salmeron P, Herrera R S. Distorted and unbalanced systems compensation within instantaneous reactive power framework. IEEE Transactions on Power Delivery, 2006, 21(3): 1655–1662

[12] Kirawanich P, O’Connell R M. Fuzzy logic control of an active power line conditioner. IEEE Transactions on Power Electronics, 2004, 19(6): 1574–1585

[13] Jain S K, Agrawal P, Gupta H O. Fuzzy logic controlled shunt active power filter for power quality improvement. IEE Proceedings — Electric Power Applications, 2002, 149(5): 317–328

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