Three phase control for PWM-switchedautotransformer voltage-SAG compensator based on phase angle analysis

Muhamad Mansor, Nasrudin Abd Rahim

Research output: Contribution to journalArticle

1 Citation (Scopus)


Enhancing compensating capability is essential in a voltage-sag compensator. It involves two main aspects, first, sag detection technique and second, voltage sag compensator. Many detection techniques have been introduced to measure and to detect voltage sag, such as RMSValue Evaluation and Peak-Value Evaluation. Unfortunately, most of the techniques require a delay for sag to be detected then compensated, whereas immediate sag detection is vital to improvement of transient performance. Presented is a three-phase PWM-switched autotransformer voltage-sag compensator that is based on AC-AC converter and that uses the proposed three phase controller based on Phase Angle Analysis as the detection technique. The significant advantage of this detection technique is the detection time. It is capable of detecting and compensating voltage sag the moment sag occurs without delay. Its effectiveness and capability were verified via MATLAB/Simulink simulation.

Original languageEnglish
Pages (from-to)102-108
Number of pages7
JournalJournal of Theoretical and Applied Information Technology
Issue number2
Publication statusPublished - 2011


All Science Journal Classification (ASJC) codes

  • Theoretical Computer Science
  • Computer Science(all)

Cite this