Abstract:
In this project, a transformerless voltage stabilizer has been proposed to maintain continuous voltage during a wide range of voltage stability. The proposed AC voltage stabilizer for the practical IGBT switches has been investigated for both the manager and the automatic control circuit. A part of the output voltage is taken as a control circuit input voltage and produces error signal if there is a change in output voltage. Revised fault signal is used to make PWM signals for switching devices according to the output voltage stability. The PWM has controlled the current / off time of proposed switching devices (IGGT) of suggested stability. As a result, the stabilizer supply constant voltage in load during any change in the supply voltage. The simulation waveforms and calculations of the total Harmonic distortion (THD) values are compared with previously studied AC buck boost stabilizer. Output voltage, output current and input current and THD values have been improved in the case of proposed AC voltage stabilizer.
