Solar Smart Inverter: A Novel Design using Multi level Topology and PulseWidth Modulation with Load Detection

Abstract

The term solar smart inverter has become a buzzword in the electronics industry which is a blending of multilevel inverter, solar tracking and solar charging. Inverters are predominantly classified as single level inverters and multilevel inverters. Minimum harmonic distortion, reduced EMI/RFI generation are the major advantages of multilevel inverters as compared to single level inverters. Multilevel inverters can operate on various voltage levels. Multipurpose applications, such as active power filters, machine drives for sinusoidal and trapezoidal current applications can be realized by multi-stage inverter. By incorporating pulse-width modulation (PWM) control, within the inverters we can control the gain of inverters more effectively. One of the most forthright methods of describing voltage source modulation for multilevel inverter is carrier based PWM schemes that can be conceived by the intersection of a modulating signal with triangular carrier waveforms. In this paper, we are designing a Solar Multilevel Pulse Width Modulator inverter using microcontroller and cascade H bridge topology which increases the efficiency and reliability of the system. We are also assimilating Maximum Power Point Tracking for higher efficiency. The solar panel will track the sun from dusk to dawn to get maximum power of sunlight to the solar panel.