ijett-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
© 2013 by IJETT Journal
Volume-4 Issue-6                      
Year of Publication : 2013


M.VENKATESWARLU. "A NOVEL CONTROL METHOD FOR UNIFIED POWER QUALITY CONDITIONER USING NINE - SWITCH POWER CONDITIONER". International Journal of Engineering Trends and Technology (IJETT). V4(6):2297-2301 Jun 2013. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group.


The load - reactive power compensation in most of the UPQC based power quality compensation application is done by shunt APF, whereas, the series APF is generally utilized to compensate voltage related problems. In a typical distribution system the voltage sag and/or swell, flicker, unbalance, etc . are short duration power quality problems. This paper is an attempt to make the use of existing series inverter to compensate load - reactive power by introducing a power angle difference between source and load voltage, keeping both of the voltage’s magni tude same. It will eventually result in better utilization of series inverter. This new reactive power sharing feature between both the inverters would help to reduce the burden on shunt inverter and ultimately results in reduction of shunt inverter rating by certain percentage. This concept is termed as the ?PAC of the UPQC?. The simulation results based on MATLAB/Simulink are discussed in detail to support the concept developed in the paper. The proposed approach is also validated through experimental stu dy.


[1] H. Akagi, ?New trends in active filters for power conditioning,? IEEE Trans. Ind. Appl., vol. 32, no. 6, pp. 1312 – 1322, Nov. - Dec. 1996.
[2] B. Singh, K. Al - Haddad, and A. Chandra, ?A review of active power filters for power quality improvement,? IE EE Trans Ind. Electron., vol. 45, no. 5, pp. 960 – 971, Oct. 1999.
[3] L. Gyugyi, ?Unified power - flow control concept for flexible AC transmission systems,? Proc. Inst. Elect. Eng. C, Gen., Transm., Distrib., vol. 139, no. 4, pp. 323 – 331, Jul. 1992.
[4] H. Fujita an d H. Akagi, ?The unified power quality conditioner: The integration of series and shunt - active filters,? IEEE Trans. Power Electron., vol. 13, no. 1, pp. 315 – 322, Mar. 1998.
[5] D. L. Ashcroft, ?The static power converter committee — Some perspectives,? IEEE Tra ns. Ind. Applicat., vol. IA - 21, no. 5, pp. 1097 – 1098, Sep. 1985.
[6] B. Han, B. Bae, H. Kim, and S. Baek, ?Combined operation of unified power - quality conditioner with distributed generation,? IEEE Trans. Power Delivery, vol. 21, no. 1, pp. 330 – 338, Jan. 2006 .
[7] H. Johal and D. Divan, ?Design considerations for series - connected distributed FACTS converters,? IEEE Trans. Ind. Applicat., vol. 43, no. 6, pp. 1609 – 1618, Nov./Dec. 2007.
[8] T. L. Lee, J. C. Li, and P. T. Cheng, ?Discrete frequency tuning active filter for power system harmonics,? IEEE Trans. Power Electron., vol. 24, no. 5, pp. 1209 – 1217, May 2009.

Active powers filter (APF), power angle control, power quality, reactive power compensation, unified power quality conditioner (UPQC).