Design Of One Phase Inverter 250 Watt Third Harmonic Injection Pulse Width Modulation Method In Mini-Grid Photovoltaic
2020
An inverter is an electrical power device that functions to convert DC voltage to AC voltage. The design of this inverter applied the Third Harmonic Injector Pulse Width Modulation (THIPWM) method which was implanted into the Arduino Uno microcontroller to increase the inverter performance by forming the reference signal using the sum of sinusoidal (fundamental) waves with the third harmonic wave. The simulation using PSIM software indicated that with DC voltage input of 267 Volts, the THIPWM method inverter, after passing through the LC filter, AC voltage of 221 Volts could be produced, which could theoretically be implemented. The result of the implementation test showed that the system could only load up to 40 watts, because if the system was loaded with more than 40 watts, the inverter voltage source of the quadratic boost converter would decrease and could not reach 267 Volt and the measurement value of inverter output voltage, according to calculation, had a maximum error of 3.12 percent in every load change.
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