A new topology of unified power quality conditioner
(UPQC) is proposed for different power quality (PQ) improvement in
a three-phase four-wire (3P-4W) distribution system. For neutral
current mitigation, a star-hexagon transformer is connected in shunt
near the load along with three-leg voltage source inverters (VSIs)
based UPQC. For the mitigation of source neutral current, the uses of
passive elements are advantageous over the active compensation due
to ruggedness and less complexity of control. In addition to this, by
connecting a star-hexagon transformer for neutral current mitigation
the over all rating of the UPQC is reduced. The performance of the
proposed topology of 3P-4W UPQC is evaluated for power-factor
correction, load balancing, neutral current mitigation and mitigation
of voltage and currents harmonics. A simple control algorithm based
on Unit Vector Template (UVT) technique is used as a control
strategy of UPQC for mitigation of different PQ problems. In this
control scheme, the current/voltage control is applied over the
fundamental supply currents/voltages instead of fast changing APFs
currents/voltages, thereby reducing the computational delay.
Moreover, no extra control is required for neutral source current
compensation; hence the 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.
[1] E. W. Gunther and H. Mehta, "A survey of distribution system power
quality", IEEE Trans. On Power Delivery, vol.10, No.1, pp.322-329,
Jan.1995.
[2] A. C. Liew, "Excessive neutral current in three-phase fluorescent
lighting circuits," IEEE Trans. Ind. Appl., vol.25, no.4, pp.776-
782.Jul./Aug. 1989.
[3] T. M. Gruzs, "A survey of neutral currents in three-phase computer
systems, "IEEE Trans. Ind. Appl.,vol.26,no.4,pp.719-725,Jul./Aug.1990.
[4] IEEE recommended practices and requirements for harmonic control in
electric power system, IEEE Std.519, 1992.
[5] IEEE Recommended Practice for Monitoring Electric Power Quality,
IEEE Std. 1159, 1995.
[6] P. Jayaprakash , B. Singh and D.P. Kothari , Star/Hexagon transformer
Based Three-Phase Four-Wire DSTATCOM for Power Quality
Improvement," International Journal of Emerging Electric Power
Syatem,vol.9,no.8,Article1,Dec.2008.
[7] J. Praveen , B. P. Muni, S. Venkateshwarlu and H. V. Makthal , "
Review of dynamic voltage restorer for power quality Improvement,"
Proc.IEEE IECON2004, Nov.2004, vol.1, pp.749-754..
[8] B. Han , B. Bae , H. Kim and S. Baek , "Combined operation of unified
power-quality conditioner with distributed generation," IEEE Trans.
Power Del., vol. 21, no. 1, pp. 330-338, Jan. 2006.M. Young, The
Techincal Writers Handbook. Mill Valley, CA: University Science,
1989.
[9] T. Zhili , L. Xun , C. Jian , K. Yong and D. Shanxu , "A direct control
strategy for UPQC in three-phase four-wire system," in Proc. IEEE
Conf. on Power Electron. and Motion Control 2006,vol.2,pp.1-5.
[10] V. Khadkikar and A. Chandra , "A Novel Structure for Three-Phase
Four-Wire Distribution System Utilizing Unified Power Quality
Conditioner (UPQC),"IEEE Trans. Industry Appl.,vol.45,pp.1897-
1902,2009
[11] L. Xun , Z. Guorong , D. Shanxu and C. J. Chen , "Control Scheme for
Three-Phase Four-Wire UPQC in a Three-Phase Stationary Frame," in
Procd.IEEE/IECON 2007, pp.1732-1736, 2007.
[12] A. Ghosh , A. K. Jindal and A. Joshi , "A unified power quality
conditioner for voltage regulation of critical load bus," in Proc. IEEE
Power Eng. Society General Meeting, June 2004, vol.1, pp471-476.
[13] B. Singh and Venkateswarlu, "A Simplified Control Algorithm for
Three-Phase Four-Wire Unified Power Quality Conditioner," Journal of
Power Electronics, vol.10, No.1, January2010.
[14] G. Chen , Y. Chen and K. M. Smedley , "Three-phase four-leg active
power quality conditioner without references calculation," in Procd.
IEEE APEC '04, vol.1, pp.587-593, 2004.
[15] 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.
[16] B. Singh, S. Gairola, B. N. Singh, A. Chandar and K. Al-Haddad,
"Multipulse AC-DC Converters for improving Power Quality: A
Review," IEEE Trans. On Power Electronics, vol.23, no.1, pp.260-281,
Jan2008.
[17] B. Singh, S. Gairola, B. N. Singh, A. Chandar and K.Al-Haddad, "Power
Quality Improvements in Isolated Twelve-Pulse AC-DC Converters
using Delta/Double-Polygon transformer," in Procd. of IEEE PESC,
June 2007,pp.2848-2853.
[18] B. N. Singh , P. Rastgoufard , B. Singh , A. Chandra and K. A. Haddad.,
"Design, simulation and implementation of the three pole/four pole
topologies for active filters," in Inst. Elect. Engg. Proc. Electr. Power
Appl., Jul.2004, vol.151, no.4, pp.467-476.
[1] E. W. Gunther and H. Mehta, "A survey of distribution system power
quality", IEEE Trans. On Power Delivery, vol.10, No.1, pp.322-329,
Jan.1995.
[2] A. C. Liew, "Excessive neutral current in three-phase fluorescent
lighting circuits," IEEE Trans. Ind. Appl., vol.25, no.4, pp.776-
782.Jul./Aug. 1989.
[3] T. M. Gruzs, "A survey of neutral currents in three-phase computer
systems, "IEEE Trans. Ind. Appl.,vol.26,no.4,pp.719-725,Jul./Aug.1990.
[4] IEEE recommended practices and requirements for harmonic control in
electric power system, IEEE Std.519, 1992.
[5] IEEE Recommended Practice for Monitoring Electric Power Quality,
IEEE Std. 1159, 1995.
[6] P. Jayaprakash , B. Singh and D.P. Kothari , Star/Hexagon transformer
Based Three-Phase Four-Wire DSTATCOM for Power Quality
Improvement," International Journal of Emerging Electric Power
Syatem,vol.9,no.8,Article1,Dec.2008.
[7] J. Praveen , B. P. Muni, S. Venkateshwarlu and H. V. Makthal , "
Review of dynamic voltage restorer for power quality Improvement,"
Proc.IEEE IECON2004, Nov.2004, vol.1, pp.749-754..
[8] B. Han , B. Bae , H. Kim and S. Baek , "Combined operation of unified
power-quality conditioner with distributed generation," IEEE Trans.
Power Del., vol. 21, no. 1, pp. 330-338, Jan. 2006.M. Young, The
Techincal Writers Handbook. Mill Valley, CA: University Science,
1989.
[9] T. Zhili , L. Xun , C. Jian , K. Yong and D. Shanxu , "A direct control
strategy for UPQC in three-phase four-wire system," in Proc. IEEE
Conf. on Power Electron. and Motion Control 2006,vol.2,pp.1-5.
[10] V. Khadkikar and A. Chandra , "A Novel Structure for Three-Phase
Four-Wire Distribution System Utilizing Unified Power Quality
Conditioner (UPQC),"IEEE Trans. Industry Appl.,vol.45,pp.1897-
1902,2009
[11] L. Xun , Z. Guorong , D. Shanxu and C. J. Chen , "Control Scheme for
Three-Phase Four-Wire UPQC in a Three-Phase Stationary Frame," in
Procd.IEEE/IECON 2007, pp.1732-1736, 2007.
[12] A. Ghosh , A. K. Jindal and A. Joshi , "A unified power quality
conditioner for voltage regulation of critical load bus," in Proc. IEEE
Power Eng. Society General Meeting, June 2004, vol.1, pp471-476.
[13] B. Singh and Venkateswarlu, "A Simplified Control Algorithm for
Three-Phase Four-Wire Unified Power Quality Conditioner," Journal of
Power Electronics, vol.10, No.1, January2010.
[14] G. Chen , Y. Chen and K. M. Smedley , "Three-phase four-leg active
power quality conditioner without references calculation," in Procd.
IEEE APEC '04, vol.1, pp.587-593, 2004.
[15] 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.
[16] B. Singh, S. Gairola, B. N. Singh, A. Chandar and K. Al-Haddad,
"Multipulse AC-DC Converters for improving Power Quality: A
Review," IEEE Trans. On Power Electronics, vol.23, no.1, pp.260-281,
Jan2008.
[17] B. Singh, S. Gairola, B. N. Singh, A. Chandar and K.Al-Haddad, "Power
Quality Improvements in Isolated Twelve-Pulse AC-DC Converters
using Delta/Double-Polygon transformer," in Procd. of IEEE PESC,
June 2007,pp.2848-2853.
[18] B. N. Singh , P. Rastgoufard , B. Singh , A. Chandra and K. A. Haddad.,
"Design, simulation and implementation of the three pole/four pole
topologies for active filters," in Inst. Elect. Engg. Proc. Electr. Power
Appl., Jul.2004, vol.151, no.4, pp.467-476.
@article{"International Journal of Electrical, Electronic and Communication Sciences:62479", author = "Yash Pal and A.Swarup and Bhim Singh", title = "Star-Hexagon Transformer Supported UPQC", abstract = "A new topology of unified power quality conditioner
(UPQC) is proposed for different power quality (PQ) improvement in
a three-phase four-wire (3P-4W) distribution system. For neutral
current mitigation, a star-hexagon transformer is connected in shunt
near the load along with three-leg voltage source inverters (VSIs)
based UPQC. For the mitigation of source neutral current, the uses of
passive elements are advantageous over the active compensation due
to ruggedness and less complexity of control. In addition to this, by
connecting a star-hexagon transformer for neutral current mitigation
the over all rating of the UPQC is reduced. The performance of the
proposed topology of 3P-4W UPQC is evaluated for power-factor
correction, load balancing, neutral current mitigation and mitigation
of voltage and currents harmonics. A simple control algorithm based
on Unit Vector Template (UVT) technique is used as a control
strategy of UPQC for mitigation of different PQ problems. In this
control scheme, the current/voltage control is applied over the
fundamental supply currents/voltages instead of fast changing APFs
currents/voltages, thereby reducing the computational delay.
Moreover, no extra control is required for neutral source current
compensation; hence the 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 = "Power-factor correction, Load balancing, UPQC,
Voltage and Current harmonics, Neutral current mitigation, Starhexagon
transformer.", volume = "5", number = "1", pages = "124-6", }