Reduction of harmonic using single phase shunt active filter based on FFT method for cascaded multilevel inverter

The usage of power electronic devices has been widely used in domestic appliances and industrial applications. Consequently, it will create such a huge problem in terms of the power quality in distribution system. This is because nonlinear loads generate a non-sinusoidal waveform passes through the distribution system which leads to voltage and current harmonics. Although the implementation of MLI with PWM control scheme produces less harmonic output, yet by installing non-linear loads into the system still indicate high harmonics effect. This paper demonstrates a method of mitigation harmonic using single phase shunt active power filter APF based on Fast Fourier Transform method for cascaded multilevel inverter. The results successfully mitigate current harmonics by having the THD value is lower than 5% which comply with the IEEE Standard 519-1992. The model is designed in MATLAB/Simulink in order to carry out the simulation and it is proven that the single phase shunt APF based on FFT technique is capable to reduce harmonic that are generated by nonlinear loads.