scholarly journals Realization of a Single-Phase Multilevel Inverter for Grid-Connected Photovoltaic System

2018 ◽  
Vol 8 (5) ◽  
pp. 3344-3349 ◽  
Author(s):  
A. Nouaiti ◽  
A. Mesbahi ◽  
A. Saad ◽  
M. Khafallah ◽  
M. Reddak
Keyword(s):  
Power Flow ◽  
Single Phase ◽  
Test Bench ◽  
Multilevel Inverter ◽  
Photovoltaic System ◽  
Solar Panels ◽  
Direct Power ◽  
Current Controller ◽  
Power Switches ◽  
Sinusoidal Current

This paper introduces the implementation of a single-phase multilevel inverter for a grid-connected photovoltaic system. The considered topology contains a full bridge converter tied to an auxiliary circuit made of two power switches. A proportional integral (PI) current controller is established with this inverter to inject a sinusoidal current into the grid with a power factor near to unity. The studied system is tested on Matlab/Simulink and verified by experiment through a test bench comprising of a fabricated prototype and a DSP TMS320F28379D. The obtained results prove the efficiency of the inverter to maintain a direct power flow from DC sources, such as solar panels, to the grid by respecting some normalized criteria for this operation.

scholarly journals Experimental Implementation of a Low-Cost Single Phase Five-Level Inverter for Autonomous PV System Applications Without Batteries

2018 ◽  
Vol 8 (1) ◽  
pp. 2452-2458 ◽  
Author(s):  
A. Nouaiti ◽  
A. Saad ◽  
A. Mesbahi ◽  
M. Khafallah
Keyword(s):  
Single Phase ◽  
Control Method ◽  
Low Cost ◽  
Multilevel Inverter ◽  
Photovoltaic System ◽  
Solar Panels ◽  
Pv System ◽  
Point Tracking ◽  
Switched Capacitor Converter ◽  
Storage Batteries

This paper presents the design and the implementation of a low-cost single phase five-level inverter for photovoltaic applications. The proposed multilevel inverter is composed of a simple boost converter, a switched-capacitor converter, and an H-bridge converter. An efficient control method which associates a closed-loop regulation method with a simple maximum power point tracking (MPPT) method is applied in order to allow the proposed multilevel inverter to transfer power energy from solar panels to autonomous load with no storage batteries. An experimental prototype of this inverter is fabricated at the laboratory and tested with a digital control system. Obtained results confirm the simplicity and the performance of the proposed photovoltaic system.

Switching Modulation Strategies for Multilevel Inverter

2021 ◽  
Vol 20 (2) ◽  
pp. 1-7
Author(s):  
Jahanzeb - ◽  
Shahrin Md. Ayob ◽  
Saifullah Khan ◽  
Mohd Zaki Daud ◽  
Razman Ayop
Keyword(s):  
Single Phase ◽  
Multilevel Inverter ◽  
Level Control ◽  
Multilevel Inverters ◽  
Power Switches ◽  
Modulation Schemes ◽  
Multicarrier Pwm

There is always a need to create efficient and optimized converters to deliver the best possible results to achieve a better THD profile in the waveform output. One way is by controlling the switching of the power switches of the converters using appropriate modulation schemes. While numerous works have been done in proposing new switching modulation strategies for multilevel inverters, this work will compare multicarrier PWM and near-to-level control (NLC) modulation schemes. In this paper, multicarrier PWM variants, namely, PD-PWM, POD-PWM, and APOD-PWM, are designed and simulated. Their voltage THD and spectrum performance are discussed when applied to single-phase 7, 9, and 11-level cascaded multilevel inverters. Then NLC modulation will be designed and applied to similar multilevel inverter circuits. It will be shown that the NLC exhibits some superior performances compared to PWM-based but with several drawbacks that can be optimized. 

scholarly journals Integration of Single Phase Reduced Switch Multilevel Inverter Topology for Grid Connected Photovoltaic System

2017 ◽  
Vol 138 ◽  
pp. 1177-1183 ◽  
Author(s):  
N. Prabaharan ◽  
A. Rini Ann Jerin ◽  
K. Palanisamy ◽  
S. Umashankar
Keyword(s):  
Single Phase ◽  
Multilevel Inverter ◽  
Photovoltaic System ◽  
Inverter Topology

scholarly journals Simulation of single phase photovoltaic system based on fuzzy logic control with multilevel inverter

2019 ◽  
Vol 107 ◽  
pp. 02003 ◽  
Author(s):  
Ezzaldden Raweh ◽  
Wei Pi ◽  
Omar Busati ◽  
Abdul Rehman ◽  
Saif Mubbarak ◽  
...  
Keyword(s):  
Fuzzy Logic ◽  
Power Systems ◽  
Fuzzy Logic Control ◽  
Single Phase ◽  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Optimal Operation ◽  
Multilevel Inverter ◽  
Photovoltaic System ◽  
Logic Control

To control the solar power, reliability and stability are two main challenges. In addition, the total harmonic distortion (THD) must be within limits for optimal operation. In an inverter, the harmonics are produced during the conversion of DC power to AC power, which will affect the power electronic devices. Therefore, to overcome such challenges in high voltage and high power systems multilevel inverter (MLI) topology is more useful. Such type of inverters uses various DC voltage levels to generate the stepped AC at its output, approaching the sinusoidal shape. The cascaded H-bridge, capacitor-clamped, and diode-clamped are the most commonly used multilevel inverters topologies. For photovoltaic (PV) usage, cascaded H-bridge (CHB) MLI is more adaptive among the three topologies, where for each H-bridge unit; each PV model behaves as an isolated DC source. This paper specifically focused on the simulation of PV power as a source to the system and displayed the potential of a single-phase 11-level CHB inverter. For switching the IGBT devices, sinusoidal pulse width modulation (SPWM) is applied. Moreover, the fuzzy logic control (FLC) is introduced to improve the power quality. FLC reduce the THD via finding the appropriate set of IGBT switch signals. To show the improvement in the operation and reduction in the complex harmony signal effects of the CHB 11-level inverter, the proposed system is designed in Matlab/Simulink software. Finally, the results show that the dynamic behavior of the FLC is much better than the traditional proportional integral derivative (PID) controller.

Single-Phase Single Stage String Inverter for Grid Connected Photovoltaic System

2015 ◽  
Vol 785 ◽  
pp. 177-181
Author(s):  
Siti Zaliha Mohammad Noor ◽  
Ahmad Maliki Omar ◽  
M.A.M. Radzi
Keyword(s):  
Simulation Model ◽  
Single Phase ◽  
Pulse Width Modulation ◽  
Single Stage ◽  
Maximum Power ◽  
Photovoltaic System ◽  
Prototype System ◽  
Point Tracking ◽  
Power Switches ◽  
Power Point

This paper presents the development of single-phase single stage string inverters for grid connected photovoltaic system. The inverter is designed to generate an AC current in phase with the grid voltage and to extract the maximum power from the PV array. The maximum power point tracking (MPPT) is achieved by adjusting the modulation index and phase angle of the inverter’s voltage accordingly using fuzzy logic control algorithm. The prototype system is tested using 2 series of STP170s-24/Ac PV modules. Insulated Gate Bipolar Transistors (IGBTs) are used as power switches while the Sinusoidal Pulse Width Modulation (SPWM) scheme is used as the switching technique to synthesize the output waveform. Simulation model was developed in MATLAB/Simulink environment to study and evaluate behavior of the proposed converter. The results of the prototype system show good agreement with the simulation model.

Research on Single Phase Photovoltaic Generation under Grid-Connected Inverter

2011 ◽  
Vol 143-144 ◽  
pp. 169-173
Author(s):  
Yi Jun Wang ◽  
Lin Llin Sui
Keyword(s):  
Single Phase ◽  
System Development ◽  
Photovoltaic System ◽  
Solar Array ◽  
Maximum Power Point ◽  
Photovoltaic Generation ◽  
Current Output ◽  
Sinusoidal Current ◽  
Grid Connected Inverter ◽  
Power Point

The grid-connected photovoltaic system is a trend of photovoltaic system development. According to the character of solar array,we designed a novel grid-connected photovoltaic inverter with the function of Maximum Power Point Tracking.The inverter consist s of a DC-DC converter and a DC-AC inverter and the two parts are combined by a Dclink. The part of control achieve synchronization sinusoidal current output with the network voltage.

Reduction in controlled power switches for a single-phase novel multilevel inverter

2019 ◽  
Vol 106 (8) ◽  
pp. 1200-1215 ◽  
Author(s):  
Bidyut Mahato ◽  
Saikat Majumdar ◽  
Kartick Chandra Jana
Keyword(s):  
Single Phase ◽  
Multilevel Inverter ◽  
Power Switches
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