DESIGN,IMPLEMENTATION AND POWER QUALITY ANALYSIS OF SIX DIFFERENT AC REGULATION CONTROL TECHNIQUES.
Dr. Tahir Izhar
The large variations in the ac voltage greatly affects the working of electrical equipment and can
cause severe damage to them and sometimes complete failure. To overcome this problem,
voltage regulators are used that maintain the voltage within desired range. This project examines
the design procedure to implement six different automatic ac voltage regulation techniques. Microcontroller
based designs are implemented for the increase in efficiency and better response. The
proposed techniques include online tap changing using electromagnetic relays, dc motor
stabilizers, tap changing using solid state triacs, phase control method, PWM based solid state
regulators and three-phase inverter. Complete design description and working is provided
separately for each technique. Hardware is developed for each technique and tested in different
voltage conditions. Power quality analysis of each technique is done that differentiate them, based
on their employment in industrial and domestic use. Important comparison points include speed
of response, sag and swell level, total harmonic distortion, types of power faults handled,
ruggedness, cost and efficiency.