Development of Dual PV System with Field Programmable Gate Array (FPGA) for Multilevel Inverters

Abstract

In this emerging era, the demand and utilization of electrical energy is high. In various ways, electrical power is utilized, and the world is heading towards the renewable energy resources, which is one of the major sources of electrical power. The output of these sources is mostly DC and our most of the loads are AC operating. So, it requires conversion i.e. DC to AC power for consumption. So, the inverters are introduced for this purpose. The multilevel inverters are introduced to reduce the demerits of two level and three level conventional inverters. This thesis introduces a new method of generating five levels using symmetrical cascaded H-bridge topology of multilevel inverters with field programmable gate array ( FPGA ) for solar energy system. The field programmable gate array is used as a controller for the switching of solid state devices i.e. MOSFETs by using single pulse width modulation technique. The simulation of the controller is done with MODEL SIM PE student version 10.4a and, its programming is done on Quartus-II (64-bit) with the help of Verilog hardware programming language. In this research two H-bridges are connected in cascade to get the required number of levels at the output by designing the prototype. These five levels are analyzed on the Power quality (PQ) analyzer, output voltage and total harmonic distortion is also observed on the power quality analyzer.