A New Approach Based on Instantaneous Power Theory for Improving the Performance of UPQC Under Unbalanced and Distortional Load ConditionsReportar como inadecuado




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Automatika : journal for control, measurement, electronics, computing and communications, Vol.56 No.2 October 2015. -

In order to deal with power quality problems under distortional and unbalanced load conditions, this paper presents a new control method for a four-wire three-phase unified power quality conditioner UPQC which is based on instantaneous power p-q theory. The proposed control approach is based on instantaneous power and is optimized by using a self-tuning filter STF, without using any low-pass filters LPFs or phase locked loop PLL, and without measuring load or filter currents. In this approach, the load and source voltages are used to generate the reference voltages of a series active power filter APF and source currents are used to generate the reference currents of a shunt APF. Therefore, the number of times that current is measured is reduced and system performance is improved. The performance of the proposed control approach is evaluated in terms of power factor correction, source neutral current mitigation, load balancing and mitigation of the current and voltage harmonics of distortional and unbalanced loads in a three-phase four-wire system. The results obtained by MATLAB-SIMULINK software show the effectiveness of the proposed control technique in comparison to the conventional p-q method.

Current harmonic mitigation; power quality; source neutral current mitigation; unified power quality conditioner UPQC; voltage harmonic mitigation



Autor: Mahmoud Ebadian - ; Faculty of Electrical and Computer Engineering, University of Birjand, Birjand, Iran Mohammad Talebi - ; Facu

Fuente: http://hrcak.srce.hr/



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