Abstract: Power quality is one of the major concerns of present era. It has become important, especially with the introduction of sophisticated devices, whose performance is very sensitive to the quality of power supply. Power quality problem is an occurrence manifested as a nonstandard voltage, current or frequency that results in failure of end use instruments [1]. Two major problems dealt here are the power sags and swells. Sensitive industrial loads and utility distribution networks all suffer from various types of outages and service interruptions which may result in a significant financial loss. To improve power quality custom devices like DVR are used. The dynamic voltage restorer (DVR) is a cost effective solution for the protection of sensitive loads. The DVR, with its excellent dynamic capabilities, when installed between the supply and a critical load feeder, can compensate for voltage sags and swells. The dynamic voltage restorer consists of a voltage source, a voltage source inverter, an injection transformer and a control system. The performance of the DVR depends on control technique involved. The control system involves a PIC microcontroller and discrete PWM pulse generator [3]. The role of DVR to compensate load voltage is investigated during different fault conditions.
Keywords: Dynamic Voltage Restorer, Sags, Swells, PIC16F877, Injection Transformer, Batter, Sag Swell Generator.
Title: Power Quality Control Using Dynamic Voltage Restorer
Author: Anand Chandran, Harikrishnan P, Timmons Sebastian, Vysakh PS
International Journal of Electrical and Electronics Research
ISSN 2348-6988 (online)
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