52% Sag Compensation Using Direct Converter Based DVR by Modulating the Error Signal

S. Abdul Rahman, Estifanos Dagnew

Abstract


The aim of this paper is to achieve 52% sag compensation using direct converter based DVR. The DVR topology has only two switches. The DVR is designed to compensate the sag in a phase by taking power from the same phase.  A direct converter is connected between the series transformer and the line in which sag compensation is to be achieved. If the amplitude of the carrier signal is kept constant at 1 unit and the true amplitude of error signal is used for PWM generation, it is possible to achieve only 22% of sag compensation. If the error signal is modulated according to the existing sag, 52% of the sag is compensated through ordinary PWM technique with the THD less than 5%. Simulation results are presented for the validating the analysis.


Keywords


Voltage Sag; Direct Converter; DVR; Series Transformer; Modulated Error Signal

References


Danalakshmi D, et al., “A control strategy on power quality improvement in consumer side using custom power device” Indonesian journal of Electrical Engineering and Computer science, Vol 15, No 1: July 2019

Ali Basim Mohammed, et al., “Power quality improvement using dynamic voltage restorer in electrical distribution system: an overview,” Indonesian journal of Electrical Engineering and Computer science, Vol 17, No 1: January 2020.

Jamal Abdul-Kareem Mohammed, et al., “Voltage disturbance mitigation in Iraq's low voltage distribution system,” Indonesian journal of Electrical Engineering and Computer science, Vol 17, No 1: January 2020.

Suma Jothibasu and Mahesh K. Mishra, “A Control Scheme for Storage less DVR Based on Characterization of Voltage Sags,” IEEE Transactions on Power Delivery, Vol. 29, no. 5, 2014.

Jiangfeng Wang, et al.,” A Novel Dual-DC-Port Dynamic Voltage Restorer with Reduced-Rating Integrated DC–DC Converter for Wide-Range Voltage Sag Compensation,” IEEE Transactions on Power Electronics, Vol. 34, no. 8, 2019.

R. Omar and N. A. Rahim , “Voltage unbalanced compensation using dynamic voltage restorer based on supercapacitor,” International Journal of Electrical Power & Energy Systems, Vol. 43, Issue 1, Pages 573-581, December 2012.

Darvish Falehi, A and Rostami, M, “Employing of Minimum Active Power Injection Strategy to Compensate Voltage Sag by DVR. Majlesi Journal of Electrical Engineering, Vol 5 No 3 September, 2011.

Kheibar, M, et al., “Design of Novel Approach to Mitigate Voltage Sag Caused by Starting an Induction Motor Using Dynamic Voltage Restorer,” Majlesi Journal of Electrical Engineering, Vol. 10 No 4, December, 2016.

S. Abdul Rahman and P. Somasundaram, Mitigation of voltage sag& swell using AC/AC converter, Australian Journal of Electrical & Electronics Engineering, Vol. 11, No. 2, pp.186 – 194, 2014.

S. Abdul Rahman, et al., Mitigation of voltage sag and swell using Carrier Modulated PWM technique, Journal of Electrical Power and Energy Systems, Elsevier, Vol. 66, pp. 78-85, 2015.

S. Abdul Rahman, et al., Mitigation of voltage sag& swell using DVR with minimum switch count, Journal of Power Electronics, Vol. 14, No. 6, pp. 1769–1773, 2014.

Ebrahim Babaei, et al., “Mitigation of Voltage Disturbances Using Dynamic Voltage Restorer Based on Direct Converters,” IEEE Transactions on Power Delivery, Vol. 25, no. 4, 2010.

S. Abdul rahman, and P. Somasundaram, Mitigation of voltage sag and swell using Dynamic Voltage Restorer without energy storage, International Review on Electrical Engineering, vol. 7, pp. 4948–4953, 2013.




DOI: http://doi.org/10.11591/ijeecs.v19.i2.pp%25p
Total views : 2 times

Refbacks

  • There are currently no refbacks.


Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

shopify stats IJEECS visitor statistics