Mitigation of Voltage Sag and Swell Using Direct Converters with Minimum Switch Count

Abdul Rahman Syed Abuthahir; Somasundaram Periasamy; Janakiraman Panapakkam Arumugam

Mitigation of Voltage Sag and Swell Using Direct Converters with Minimum Switch Count

Abdul Rahman Syed Abuthahir

Somasundaram Periasamy

Janakiraman Panapakkam Arumugam

Vol. 14, No. 6, pp. 1314-1321, Nov. 2014

10.6113/JPE.2014.14.6.1314

Direct converter

Dynamic voltage restorer (DVR)

Pulse width modulation (PWM)

Voltage sag

Voltage swell

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Abstract

A new simplified topology for a dynamic voltage restorer (DVR) based on direct converter with a reduced number of switchesis presented. The direct converter is fabricated using only three bi-directional controlled switches. The direct converter isconnected between the grid and center-tapped series transformer. The center-tapped series transformer is used to inject thecompensating voltage synthesized by the direct converter. The DVR can properly compensate for long-duration, balanced, andunbalanced voltage sag and swell by taking power from the grid. The switches are driven by ordinary pulse width modulationsignals. Simulation and hardware results validate the idea that the proposed topology can mitigate sag of 50% and swell ofunlimited quantity.

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Cite this article

[IEEE Style]

A. R. S. Abuthahir, S. Periasamy, J. P. Arumugam, "Mitigation of Voltage Sag and Swell Using Direct Converters with Minimum Switch Count," Journal of Power Electronics, vol. 14, no. 6, pp. 1314-1321, 2014. DOI: 10.6113/JPE.2014.14.6.1314.

[ACM Style]

Abdul Rahman Syed Abuthahir, Somasundaram Periasamy, and Janakiraman Panapakkam Arumugam. 2014. Mitigation of Voltage Sag and Swell Using Direct Converters with Minimum Switch Count. Journal of Power Electronics, 14, 6, (2014), 1314-1321. DOI: 10.6113/JPE.2014.14.6.1314.