Title :
Comparative evaluation of performance of different control strategies on UPQC connected distribution system
Author :
Srinath, S. ; Selvan, M.P. ; Vinothkumar, K.
Author_Institution :
Dept. of EEE, Nat. Inst. of Technol., Trichirappalli, India
fDate :
July 29 2010-Aug. 1 2010
Abstract :
This paper presents a comparative analysis of steady state behaviour of UPQC with three different control techniques, when connected to a distribution system to protect sensitive loads against power quality problems. The control strategies based only on hysteresis, SPWM and a combination of both for controlling the firing pulses of shunt and series APFs of UPQC are discussed. In common, PI control is used for maintaining DC link voltage. PSCAD/EMTDC is used to model the UPQC connected to a RL load. The simulated model is tested with all the three control strategies and the results are verified for voltage sag and swell compensation. A comparison is made between the control schemes, taking in account of the current through shunt APF and current at the point of common coupling (PCC). The results are appreciable when hysteresis type control is applied to shunt APF and SPWM control to series APF.
Keywords :
PI control; hysteresis; power distribution control; DC link voltage; PI control; PSCAD/EMTDC; UPQC connected distribution system; comparative evaluation; different control strategies; firing pulse; hysteresis type control; point of common coupling; steady state behaviour; Hysteresis; Phase locked loops; Reactive power; Silicon compounds; Voltage control; Voltage fluctuations; Voltage measurement; Active Power Filter (APF); Hysteresis control; PSCAD/EMTDC; Sinusoidal Pulse Width Modulation (SPWM); Unified Power Quality Conditioner (UPQC);
Conference_Titel :
Industrial and Information Systems (ICIIS), 2010 International Conference on
Conference_Location :
Mangalore
Print_ISBN :
978-1-4244-6651-1
DOI :
10.1109/ICIINFS.2010.5578651