© 2019

Level Doubling Network and Ripple Correlation Control MPPT Algorithm for Grid-Connected Photovoltaic Systems


  • Nominated as an outstanding PhD thesis by The University of Bologna, Italy

  • Reports on an improved multilevel inverter based on Level Doubling Network (LDN)

  • Presents an original implementation of the maximum power point tracking (MPPT) schemes

  • Offers important insights into the stability and the dynamic performance of the ripple correlation control (RCC) MPPT algorithms


Part of the Springer Theses book series (Springer Theses)

Table of contents

About this book


This book describes an original improvement in power quality of photovoltaic generation systems obtained by the use of a multilevel inverter implemented with level doubling network (LDN). Modulation principles and harmonic analysis of output voltages are proposed and introduced in detail for both single and three-phase LDN configurations. The analysis is then extended to dc-link current and voltage, with emphasis to low-frequency harmonics and switching frequency ripple. This work represents the first comprehensive implementation of maximum power point tracking (MPPT) schemes using the ripple correlation control (RCC) algorithm in the presence of multiple ripple harmonics, such as in the case of multi­level inverters. Numerical simulations and experimental tests are carefully reported here, together with practical insights into the design of dc-link capacitors.


Ripple Correlation Control (RCC) Algorithm Level Doubling Network (LDN) Multilevel Inverter LDN Input Current Harmonics DC-link Voltage Oscillations Analysis of Current Harmonics Design of DC-link Capacitor MPPT Algorithm for Photovoltaic System Maximum Power Point Tracking Algorithms Peak-to-peak Voltage Ripple Improving the Efficiency of PV Arrays H-bridge Cell Multiple Ripple Harmonics

Authors and affiliations

  1. 1.Department of Electrical, Electronic and Information EngineeringUniversity of BolognaBolognaItaly

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