Automatic voltage Automatic voltage egulationegulation

• Principle• Basic mode of operation• Manual control system• Auto control system

Basic operation of AVRBasic operation of AVR

Problem due to Problem due to voltage voltage sags in AVR sags in AVR

Type of AVRType of AVRTap changing transformerTap changing transformerSaturable reactor regulatorsSaturable reactor regulatorsMotorized variacMotorized variacCvt’s/ferroresonant transformersCvt’s/ferroresonant transformersElectronic voltage regulatorElectronic voltage regulatorPhase controlled regulatorsPhase controlled regulators

1.Tap changing transformer

2.Saturable reactor regulators

3.Motorized variac

4.Cvt’s/ferroresonant transformer

5.Electronic voltage regulators