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http://dx.doi.org/10.6113/JPE.2011.11.6.897

Three-Phase PWM-Switched Autotransformer Voltage-Sag Compensator Based on Phase Angle Analysis  

Mansor, Muhamad (Dept. of Electrical Power Engineering, Universiti Tenaga Nasional)
Rahim, Nasrudin Abd. (UM Power Energy Dedicated Advanced Centre (UMPEDAC), University of Malaya)
Publication Information
Journal of Power Electronics / v.11, no.6, 2011 , pp. 897-903 More about this Journal
Abstract
Many voltage sag compensators have been introduced, including the traditional dynamic voltage restorer (DVR), which requires an energy storage device but is inadequate for compensating deep and long-duration voltage sags. The AC-AC sag compensators introduced next do not require a storage device and they are capable of compensating voltage sags. This type of compensator needs an AC-AC converter to regulate the output voltage. Presented in this paper is a three-phase PWM-switched autotransformer voltage sag compensator based on an AC-AC converter that uses a proposed detection technique and PWM voltage control as a controller. Its effectiveness and capability in instantly detecting and compensating voltage sags were verified via MATLAB/Simulink simulations and further investigated through a laboratory prototype developed with a TMS320F2812 DSP as the main controller.
Keywords
Peak detection; RMS detection; Voltage sag; Voltage sag compensator; Voltage sag detection;
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