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Title: Modular Cascaded H-Bridge Multilevel PV Inverter with Distributed MPPT for Grid-Connected Applications

Journal Article · · IEEE Transactions on Industry Applications
 [1];  [1];  [2];  [1];  [1];  [3]
  1. Univ. of Tennessee, Knoxville, TN (United States)
  2. Southeast Univ., Nanjing (China)
  3. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
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This paper presents a modular cascaded H-bridge multilevel photovoltaic (PV) inverter for single- or three-phase grid-connected applications. The modular cascaded multilevel topology helps to improve the efficiency and flexibility of PV systems. To realize better utilization of PV modules and maximize the solar energy extraction, a distributed maximum power point tracking (MPPT) control scheme is applied to both single-phase and three-phase multilevel inverters, which allows the independent control of each dc-link voltage. For three-phase grid-connected applications, PV mismatches may introduce unbalanced supplied power, leading to unbalanced grid current. To solve this issue, a control scheme with modulation compensation is also proposed. An experimental three-phase 7-level cascaded H-bridge inverter has been built utilizing 9 H-bridge modules (3 modules per phase). Each H-bridge module is connected to a 185 W solar panel. Simulation and experimental results are presented to verify the feasibility of the proposed approach.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1265683
Journal Information:
IEEE Transactions on Industry Applications, Vol. 51, Issue 2; ISSN 0093-9994
Publisher:
IEEECopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 354 works
Citation information provided by
Web of Science

Cited By (12)

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Nonlinear controller for maximum power extraction in asymmetric multilevel DC link reduced switch count inverter‐based grid connected PV system journal November 2019
Capacitor voltage balancing in cascaded H‐bridge multilevel inverter and its modelling analysis for grid integrated wind energy conversion system application journal May 2019
A series-parallel PV-storage independent microgrid and its decentralized control journal September 2018
An efficient RFCSA control strategy for PV connected quasi Z‐source cascaded multilevel inverter (QZS‐CMI) system
  • Ramya, Rajendran; Sivakuaran, Thangavel Swaminathan
  • International Journal of Numerical Modelling: Electronic Networks, Devices and Fields, Vol. 33, Issue 1 https://doi.org/10.1002/jnm.2660
journal July 2019
Improved control algorithm for grid-connected cascaded H-bridge photovoltaic inverters under asymmetric operating conditions journal March 2018
Performance evaluation of an asymmetrical reduced switched multi-level inverter for a grid-connected PV system journal February 2018
Efficiency optimisation of an interleaved high step-up converter journal June 2019
A Comprehensive Review on Cascaded H-bridge Inverter-Based Large-Scale Grid-Connected Photovoltaic journal August 2016
Cascaded H-Bridge MLI and Three-Phase Cascaded VSI Topologies for Grid-Connected PV Systems with Distributed MPPT journal January 2019
Photovoltaic Integrated Hybrid Microgrid Structured Electric Vehicle Charging Station and Its Energy Management Approach journal January 2019
A Hybrid PV-Battery System for ON-Grid and OFF-Grid Applications—Controller-In-Loop Simulation Validation journal February 2020

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14 SOLAR ENERGY
Photovoltaic
Distributed MPPT
Cascaded multilevel inverter
Modular
Modulated compensation