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In this paper, we will study the performance of the three-phase parallel active filter topology based on the cascade bridge voltage inverter for the compensation of harmonics generated by the same non-linear load. In fact two topologies of the parallel active filter will be analyzed, that based on a voltage inverter with five levels of cascade bridge type and the other of the same type but with a seven-level inverter using the sinusoidal pulse width modulation PWM control techniques. We will focus particularly on the interest of the improvement of the waveform of the filter voltage compared to its reference, and consequently of the source currents, by carrying out simulations. Simulation results using PSIM simulator show a reduction in THD according to the standard IEEE-519 standard.

Comparison performance five level and seven-level cascaded H-bridge multilevel inverter of total harmonic distortion (THD)