An Effective Grid Connected Multi Level Inverter Based Hybrid Wind and Solar Energy

A modified multi-level inverter with a cascaded H-bridge with a grid connected hybrid wind-solar energy system is given. Utilising their individual MPPT (maximum power point tracking) systems. In this paper, both solar and wind energy are used as input sources to the system. The total harmonic (THD) is reduced so that the appliances in the system are least affected or damaged. The dc/dc booster converters are used to step up the voltage and the maximum power is obtained by using maximum power point tracking (MPPT). Due to non-linear loads, the harmonics are produced in the system so in order to reduce the harmonics we use the MLI, as the level increases the harmonic distortion in the system decreases, so that we can reduce the disturbances and increase the appliances efficiency. So, the pulse width modulation (PWM) is used as an inverter in the system to produce the sinusoidal ac output. In this paper, we discuss mostly about, to obtain balanced voltage and current of two sources when connected by a dc-link, reducing the THD and Improve the Power quality. As the frequency is constant but the voltage is variable the voltage and frequency will be matchable as the frequency maintains constant. Hence, the output waveforms of multi-level inverter, and the simulation investigations were verified and completed in MATLAB/Simulink.