14-11-2014, 12:38 PM
Abstracts: In many big industries, Commercial and industrial electrical loads include induction motor driven equipment, elevators, pumps, presses, DC motors, power transformers, welding machines, and arc furnaces are mostly inductive in nature. Inductive load consumes reactive power (magnetizing power) in addition to the active power to do useful work. Reactive power required by inductive loads increases the amount of apparent power (measured in kVA) in the distribution system. This is important because a low power factor can waste energy, result in inefficient use of electrical power, and often result in higher energy bills. Tsc is applied to control power factor of system at unity & effectively regulate load voltage.Unity power factor controller uses SVC technique,whose output is adjusted to exchange capacitive or inductive current so as to maintain or control specific power factor.In this scheme simple circuit model of thyristor controlled reactor is modeled. The no. of capacitor of to be turned on is decided according to the reactive power requirement of load. The current delivered by the capacitor depends on the reactive power requirement.