Design and development of Single Phase Inverter with Regulated Output Voltage

As the welfare of Indonesia as a nation has been improving, the annual energy demand is also increasing. In alignment with that, the Indonesian government seeks to make policies and regulations to support the development and improvement of the use of renewable energy to meet its 23% target mix by 2025. Among the renewable energy mix comes from solar power plants. The photovoltaic module is used to generate electricity from the solar power plant, producing energy in the form of direct current (DC). However, since the consumer uses alternate current (AC), an inverter is needed to convert AC to DC with a specific frequency and voltage. To meet the requirements of the specifications for public service loads like PLN, an inverter with an output voltage and frequency is needed to keep it within tolerance limits with a variable load that is used as feedback which regulates the output voltage to apply ac voltage and current sensors. Then, it is compared to the modulation wave in the form of a sawtooth wave. The result of the comparator as a pulse distributor is to regulate the ignition of the power transistor with the help of the driver so that the inverter output voltage specification is within the expected tolerance limits. An inverter with a constant output voltage and frequency is needed to meet the quality standards based on the regulations of PT PLN. Therefore, feedback from the AC voltage and current sensor is required. The results of this sensor are then equated to the modulation wave in the form of a sawtooth wave to produce Pulse width modulation, which functions to regulate the ignition of the power transistor. Based on the data from the test results of the inverter design that has been made on incandescent lamps loaded with power from 0 to 500 watts, the inverter output voltage is within the range of 234.3 volts-260 volts and a frequency of 51.28-52.63 Hz. The results of the regulated inverter test as a provider of alternating current voltage sources for consumers are in accordance with the desired specifications. The inverter output voltage is still at the maximum limit of 220 volts + 5% and the minimum limit of 220 volts -10% when the maximum load is a 500watt incandescent lamp.