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AN EFFECTIVE CONTROL METHOD FOR QUASI-Z-SOURCE 
CASCADE MULTILEVEL INVERTER-BASED 
GRID-TIE SINGLE-PHASE PHOTOVOLTAIC POWER 
SYSTEM 
ABSTRACT: 
An effective control method, including system-level control and pulsewidth 
modulation for quasi-Z-source cascade multilevel inverter (qZS-CMI) based grid-tie 
photovoltaic (PV) power system is proposed. The system-level control achieves the 
grid-tie current injection, independent maximum power point tracking (MPPT) for 
separate PV panels, and dc-link voltage balance for all quasi-Z-source H-bridge 
inverter (qZS-HBI) modules. The complete design process is disclosed. A multilevel 
space vector modulation (SVM) for the single-phase qZS-CMI is proposed to fulfill 
the synthetization of the step-like voltage waveforms.
BLOCK DIAGRAM: 
Solar panel Battery Inverter 
Driver section 
Pic controller 
Quasi z-source 
network 
Solar panel Battery Quasi z-source Inverter 
network 
Output
TOOLS AND SOFTWARE USED: 
 MP LAB 
 ORCAD/PSPICE 
 MATLAB/SIMULINK 
OUTPUT: 
 HARDWARE 
 SIMULATION

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JPEEE1460 An Effective Control Method for Quasi-Z-Source Cascade Multilevel Inverter-Based Grid-Tie Single-Phase Photovoltaic Power System

  • 1. AN EFFECTIVE CONTROL METHOD FOR QUASI-Z-SOURCE CASCADE MULTILEVEL INVERTER-BASED GRID-TIE SINGLE-PHASE PHOTOVOLTAIC POWER SYSTEM ABSTRACT: An effective control method, including system-level control and pulsewidth modulation for quasi-Z-source cascade multilevel inverter (qZS-CMI) based grid-tie photovoltaic (PV) power system is proposed. The system-level control achieves the grid-tie current injection, independent maximum power point tracking (MPPT) for separate PV panels, and dc-link voltage balance for all quasi-Z-source H-bridge inverter (qZS-HBI) modules. The complete design process is disclosed. A multilevel space vector modulation (SVM) for the single-phase qZS-CMI is proposed to fulfill the synthetization of the step-like voltage waveforms.
  • 2. BLOCK DIAGRAM: Solar panel Battery Inverter Driver section Pic controller Quasi z-source network Solar panel Battery Quasi z-source Inverter network Output
  • 3. TOOLS AND SOFTWARE USED:  MP LAB  ORCAD/PSPICE  MATLAB/SIMULINK OUTPUT:  HARDWARE  SIMULATION