Modular Cascaded H-Bridge Multilevel Inverter with Distributed MPPT for Grid Connected Application

Bala Krishna, Pagadala (2017) Modular Cascaded H-Bridge Multilevel Inverter with Distributed MPPT for Grid Connected Application. MTech thesis.

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Abstract

This work presents a modular cascaded H-bridge multilevel photovoltaic (PV) inverter for three-phase grid-connected applications. The topology of modular cascaded H-Bridge multilevel inverter helps to improve the efficiency and flexibility of PV systems. In this work, a distributed maximum power point tracking control scheme is applied for three-phase multilevel inverter to understand a better utilization of PV modules and maximize the solar energy extraction. Because this distributed MPPT control scheme allows independent control of each dc-link voltage. The mismatches in PV panel should takes place in three-phase gridconnected applications, and the above mentioned mismatches can be introduced unbalanced power supply, create an unbalanced grid current. PV mismatches can be controlled by the following technique i.e., a modulation compensation is introduced. By using nine H-bridge modules a three-phase seven-level cascaded H-bridge inverter is built, each phase has three modules. Simulation results are presented to verify the feasibility of the proposed approach.

Item Type:Thesis (MTech)
Uncontrolled Keywords:Distributed MPPT; Modulation compensation; PV mismatches
Subjects:Engineering and Technology > Electrical Engineering > Power Systems
Engineering and Technology > Electrical Engineering > Power Electronics
Divisions: Engineering and Technology > Department of Electrical Engineering
ID Code:8930
Deposited By:Mr. Kshirod Das
Deposited On:19 Apr 2018 12:25
Last Modified:19 Apr 2018 12:25
Supervisor(s):Naik, N.Venkata Ramana

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