Improvement of Power Quality in Distribution System Using Fuzzy - Unit Vector Controller

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This paper presents a new technique for enhancing power quality by reducing harmonics in the neutral conductor. The 3P4W (Three-Phase Four-Wire) system is commonly used in the distribution system, where single and three phase loads are connected to the PCC (Point of Common Coupling). Due to this loads, system become unbalance and current will flow in the neutral conductor. If loads are non-linear, then the harmonic content of current will flow in neutral along with the fundamental component. The neutral current that may flow towards transformer neutral point is compensated by using a series active filter. In order to reduce the harmonic content, the series active filter is connected in series with the neutral conductor. In this paper, a hybrid model control which consists of unit vector and fuzzy logic based controller is used to reduce the harmonic content in the neutral conductor. The simulation is carried out in MATLAB/SIMULINK to verify the effectiveness of the proposed method.
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Neutral Current; Series Active Filter; Total Harmonic Distortion; Fuzzy Logic

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T. M. Gruzs (1990), “A survey of neutral currents in three-phase computer power systems,” IEEE Transactions on Industry Applications, vol.26, no. 4, pp. 719-725, July/August.

P.N.Enjeti, W.Shireen, P.Packebush and J.Pitel (1994), “Analysis and Design of a New active power filter to cancel neutral current harmonics in three-phase four-wire electric distribution systems” , IEEE Transaction on Industrial Applications, vol 30, pp. 1565-1572, Nov/Dec. 1994.

I.Shigenori, T Shimizu and Keiji Wada,” Control Method and compensation Characteristics of a Series Active Filter for the Neutral Conductor”, IEEE Transaction on Industrial Electronics, vol.54, No.1, Feb (2007).

H. L. Ginn III and L. S. Czarnecki, “An optimization-based method for selection of resonant harmonic filter branch parameters,” IEEE Transaction on Power Delivery. vol. 21, no. 3, pp. 1445–1451, Jul. (2006).

J. A. Pomilio and S. M. Deckmann, “Characterization and compensation of harmonics and reactive power of residential and commercial loads,” IEEE Transaction on Power Delivery, vol. 22, no. 2, pp. 1049–1055, Apr. (2007).

Hurng-Liahng Jou, Jinn-Chang Wu, Kuen-Der Wu, Wen-Jung Chiang, and Yi-Hsun Chen, “Analysis of Zig-Zag Transformer Applying in the Three-Phase Four-Wire Distribution Power System,” IEEE Transaction on Power Delivery, vol. 20, no. 2, April (2005).

M. Saitou and T. Shimizu, “A single-phase PWM rectifier with dc power active filter for fast dc output voltage control,” presented at the IEEJ Technical Meeting Semiconductor Power Converter, Kobe, Japan.

F. Z. Peng, “Harmonic sources and filtering approaches,” IEEE Industrial Applications Mag., vol. 7, no. 4, pp. 18–25,Jul./Aug. (2001).

M. Aredes, and E. H. Watanabe, “New Control Algorithms for Series and Shunt Three-phase Four-Wire Active Power Filters," IEEE Transactions on Power Delivery, vol. 10, no. 3, pp. 1649-1656 (1995).

M. Ishihara, S. Mori, G. Nakagawa, and M. Nishitoba, “Development of active filter for three-phase four-wire system", Rec. SPC meeting of IEEJ, no. SPC-96-128, pp. 63-70 (1996) (in Japanese).

M. Aredes, J. Hafner, and K. Heumann, “Three-phase Four-wire Shunt active Filter Control Strategies," IEEE Transactions on Power Electronics, vol. 12, no. 2, pp. 311-318 (1997).

J. S. Lai, and T. S. Key, “Effectiveness of harmonic mitigation equipment for commercial buildings," IEEE Transactions on Industry Applications, vol. 33, no. 4, pp. 1104 -1110 (1997).

P. Cheng, Y. Huang, and C. Hou, “Design of a neutral harmonic mitigator for three-phase four-wire distribution system," IEEE/IAS Annual Meeting, vol. 1, pp. 164-171 (2001).

Z. Wang, Q. Wang, W. Yao, and J. Liu, “A series active power filter Adopting hybrid control approach,” IEEE Transaction on Power Electronics, vol. 16, no. 3, pp. 301–310, May (2001).

F. Z. Peng, H. Akagi, and A. Nabae, “A new approach to harmonic compensation in power systems-a combined system of shunt passive and series active filters,” IEEE Transaction on Industrial Applications, vol. 26, no. 6, pp. 983–990, Nov./Dec. (1990).

A. Luo, Z. Shuai, W. Zhu, R. Fan, and C. Tu, “Development of hybrid active power filter based on the adaptive fuzzy dividing frequency-control method,” IEEE Transaction on Power Delivery, vol. 24, no. 1, pp. 424–432, Jan. 2009.

Tadashi Fukami, Toshinari Onchi, Nobuyuki Naoe, and Ryoichi Hanaoka,” Compensation for Neutral Current Harmonics in a Three- Phase Four-Wire System by a Synchronous Machine,” IEEE Transaction on Industry Applications, vol. 38,no. 5, September/October (2002).

Shigenori Inoue, Toshihisa Shimizu, and Keiji Wada, “Control Methods and Compensation Characteristics of a Series Active Filter for a Neutral Conductor,” IEEE Transaction on Industry Applications, vol. 54, no. 1, Febuary (2007).

T.Chatchanayuenyong, T. Khamriang, A. Kantarawichai, “A Fast Series Active Filter using Sliding Mode Control to Correct and Regulate Unbalance Voltage in Three-Phase System,” American Journal of Engineering and Applied Sciences, 2 (2): 393-398, (2009).

F. Z. Peng and J. S. Lai, “Generalized instantaneous reactive power theory for three phase power system,” IEEE Transaction on Instrumentation and Measurement, vol. 45, no. 1, pp. 293–297, Feb (1996).

S. Bhattacharya and D. Divan, “Synchronous frame based controller implementation for hybrid series active filter system,”IEEE/IAS Conference Proceedings, (1995), pp. 2531-2540.

Prasomsak, P., Areerak, K.-L., Areerak, K.-N., Optimal fuzzy logic controller design for shunt active power filters, (2011) International Review on Modelling and Simulations (IREMOS), 4 (6), pp. 2858-2870.

Ouederni, A., Jemai, K., Trabelsi, H., Control strategy of a Synchronous Machine under unbalanced conditions based on fuzzy logic controllers, (2012) International Review on Modelling and Simulations (IREMOS), 5 (1), pp. 193-208.

T.G.Sekar, R.Anita and R.Chandrasekar,”A Novel Control for Series Active Filter in Distribution System using Unit Vector Control”, International Journal of Computer Applications” vol.65 no.19 March 2013.


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