SELECTIVE HARMONIC ELIMINATION ALGORITHM FOR A BOOST H BRIDGE INVERTER WITH REDUCED SWITCH CONFIGURATION

Abstract

Harmonic free voltage and high modularity makes multilevel inverters with Selective Harmonic Elimination (SHE) is the key method in medium power and high power inverter which is employed in renewable energy sources. However finding optimal switching angles for the nonlinear transcendental equation of the multilevel waveform is a most tedious thing in implementing this algorithm. This work have proposed a new topology called Boost H Bridge Inverter (BHBI) with selective harmonic elimination PWM algorithm for the switching angle using evolutionary based algorithms. The proposed topology is compared with the asymmetric/symmetric configuration and Cascaded H Bridge (CHB) configurations. Simulation and hardware circuits are designed and results were verified with conventional methods.