A 3P-3W UPQC integrated with Star-Hexagon Transformer for 3P-4W Distribution System

Yash Pal*, A. Swarup**, Bhim Singh***
* Assistant Professor,Department of Electrical Engineering, National Institute of Technology, Kuruksetra, Haryana
** Professor, Department of Electrical Engineering, National Institute of Technology, Kuruksetra, Haryana.
*** Professor, Department of Electrical Engineering, Indian Institute of Technology, New Delhi, India.
Periodicity:January - March'2011
DOI : https://doi.org/10.26634/jee.4.3.1396

Abstract

In this paper, a new topology is proposed for a three-phase four-wire (3P4W) distribution system utilizing a star-hexagon transformer along with three-phase three-wire (3P3W) Unified Power Quality Conditioner (UPQC).In this proposed topology the neutral point of the star connected transformer, used for the connection of series active power filter (APF) of 3P3W UPQC, is utilized as a fourth wire for 3P4W distribution system. The star-hexagon transformer is connected near the load to compensate the neutral current that may flow toward the neutral point of the series transformer of series APF. The series and shunt APF of 3P-3W UPQC are realized by readily available three-leg voltage source inverters (VSIs). For the mitigation of different power quality problems a control technique based on synchronous reference frame (SRF) theory is used for the control of UPQC. In this control scheme of UPQC, the current/voltage control is applied over the fundamental supply currents/voltages instead of fast changing APFs currents/voltages, there by reducing the computational delay. With the connection of star-hexagon transformer, no extra control is required for the neutral current; hence required numbers of current sensors are reduced. The performance of the proposed topology of UPQC is analyzed through simulations results using MATLAB software with its Simulink and Power System Block set toolboxes.

Keywords

Active powers filter (APF), Power-factor correction, Load balancing, UPQC, Voltage and current harmonics, Neutral current compensation, Star-hexagon transformer

How to Cite this Article?

Yash Pal, A. Swarup and Bhim Singh (2011). A 3p-3w Upqc Integrated With Star-Hexagon Transformer For 3p-4w Distribution System. i-manager’s Journal on Electrical Engineering, 4(3), 23-31. https://doi.org/10.26634/jee.4.3.1396

References

[1]. E.W Gunther., and Mehta H., (1995). “A survey of distribution system power quality,” IEEE Trans. Power Delivery, Vol.10, No.1, pp.322-329, Jan.
[2]. A.C.Liew, (1989). “Excessive neutral current in threephase fluorescent lighting circuits,”IEEE Trans.Ind. Appl., Vol.25, No.4, pp.776-782.Jul. /Aug.
[3]. T.M.Gruzs, (1990). “A survey of neutral currents in three-phase computer systems, “IEEE Trans. Ind. Appl.,Vol.26, No.4,pp.719-725,Jul./Aug.
[4]. IEEE recommended practices and requirements for harmonic control in electric power system, Dec. IEEE Std.519, 1992.
[5]. IEEE Recommended Practice for Electric Power Distribution for Industrial plants, IEEE Std.141, 1993.
[6]. Arindam Ghosh, Gerard Ledwich, (2002). “Power Quality Enhancement Using Custom Power Devices” Kluwer International Series in Engineering and Computer Science.
[7]. Jayaprakash P., Singh B., and Kothari D.P., (2008). “Star/Hexagon transformer Based Three-Phase Four-Wire DSTATCOM for Power Quality Improvement,” International Journal of Emerging Electric Power System, Vol.9, No.8, Article1, Dec.
[8]. J. Praveen, B.P. Muni, S. Venkateshwarlu., and H.V. Makthal, (2004). “Review of Dynamic Voltage Restorer for Power Quality Improvement,” Proc. IEEE IECON2004, Nov. Vol.1, pp.749-754.
[9]. B. Han, B. Bae, H. Kim and S. Baek, (2006). “Combined Operation of Unified Power-quality Conditioner with Distributed Generation,” IEEE Trans. Power Del., Vol. 21, No. 1, pp. 330–338, Jan.
[10]. T. Zhili, L.Xun, C. Jian, K.Y ong., and D. Shanxu, (2006). “A direct control strategy for UPQC in three-phase four-wire system,” in Proc. IEEE Conf. on Power Electron. and Motion Control Vol.2,pp.1-5.
[11]. V. Khadkikar., and A.Chandra., (2009). “A Novel Structure for Three-Phase Four-Wire Distribution System Utilizing Unified Power Quality Conditioner (UPQC),”IEEE Trans. Industry Appl., Vol.45, pp.1897-1902.
[12]. L. Xun., Z. Guorong., D. Shanxu., and C.J.Chen, (2007). “Control Scheme for Three-Phase Four-Wire UPQC in a Three-Phase Stationary Frame,” Procd.IEEE/IECON 2007, pp.1732-1736.
[13]. A.Ghosh, A.K.Jindal., and A.Joshi, (2004). “A unified power quality conditioner for voltage regulation of critical load bus,” in Proc. IEEE Power Eng. Society General Meeting, June, Vol.1, pp471-476.
[14]. B.Singh., and Venkateswarlu, (2010). “A Simplified Control Algorithm for Three-Phase Four-Wire Unified Power Quality Conditioner,” Journal of Power Electronics, Jan. Vol.10, No.1.
[15]. G.Chen, Y.Chen., and K.M.Smedley, (2004). “Threephase four-leg active power quality conditioner without references calculation,” in Procd. IEEE APEC, Vol.1, pp.587-593.
[16]. V. Kumar, P. Agarwal and H. O. Gupta., “A Simple Control Strategy for Unified Power Quality Conditioner Using Current Source Inverter,” in Procd. IPEC2007, pp.1219-1223.
[17]. B. Singh, S. Gairola, B. N. Singh, A. Chandar and K. Al-Haddad, (2008). “Multipulse AC-DC Converters for improving Power Quality: A Review,” IEEE Trans. On Power Electronics, Jan. Vol.23, No.1, pp.260-281.
[18]. B. Singh, S. Gairola, B. N. Singh, A. Chandar and K.Al-Haddad, (2007).“Power Quality Improvements in Isolated Twelve-Pulse AC-DC Converters using Delta/Double-Polygon transformer,” in Procd. of IEEE PESC, June ,pp.2848-2853.
[19]. B. N. Singh, P. Rastgoufard, B. Singh , A. Chandra and K.A. Haddad., (2004). “Design, simulation and implementation of the three pole/four pole topologies for active filters,” in Inst. Elect. Engg. Proc. Electr. Power Appl., Jul. Vol.151, No.4, pp.467-476.
If you have access to this article please login to view the article or kindly login to purchase the article

Purchase Instant Access

Single Article

North Americas,UK,
Middle East,Europe
India Rest of world
USD EUR INR USD-ROW
Online 15 15

Options for accessing this content:
  • If you would like institutional access to this content, please recommend the title to your librarian.
    Library Recommendation Form
  • If you already have i-manager's user account: Login above and proceed to purchase the article.
  • New Users: Please register, then proceed to purchase the article.