A Neutral Point Clamped Grid Feeding Voltage Source Inverter with an Improved Control Technique for Solar PV System

2021 ◽  
Author(s):  
Sumaya Jahan ◽  
Shuvra Prokash Biswas ◽  
Md. Kamal Hosain
Keyword(s):  
Neutral Point ◽  
Control Technique ◽  
Voltage Source ◽  
Solar Pv ◽  
Voltage Source Inverter ◽  
Pv System ◽  
Solar Pv System

Modeling and Simulation of Three Phase Grid Connected Solar PV System

2018 ◽  
Vol 8 (3) ◽  
Author(s):  
Pradeep Rai ◽  
Roshan Nayak
Keyword(s):  
Voltage Source ◽  
Solar Pv ◽  
Pv System ◽  
Maximum Power Point ◽  
Point Tracking ◽  
Power Point Tracking ◽  
Three Phase ◽  
Solar Pv System ◽  
Power Point ◽  
Control Methodology

This paper proposes a nonlinear control methodology for three phase grid connected of PV generator. It consists of a PV arrays; a voltage source inverter, a grid filter and an electric grid. The controller objectives are threefold: i) ensuring the Maximum power point tracking (MPPT) in the side of PV panels, ii) guaranteeing a power factor unit in the side of the grid, iii) ensuring the global asymptotic stability of the closed loop system. Based on the nonlinear model of the whole system, the controller is carried out using a Lyapunov approach. It is formally shown, using a theoretical stability analysis and simulation results that the proposed controller meets all the objectives.

scholarly journals Reduced Switches Count of Five Level H-bridge Inverter with Integrated Boost Converter in Solar PV System

2021 ◽  
Vol 9 (11) ◽  
pp. 1243-1252
Author(s):  
Dr. T. Murali Mohan
Keyword(s):  
Energy Demand ◽  
Harmonic Distortion ◽  
Boost Converter ◽  
Total Harmonic Distortion ◽  
Control Technique ◽  
Duty Ratio ◽  
Solar Pv ◽  
Pv System ◽  
Integrated Boost ◽  
Solar Pv System

Abstract: PV systems are becoming more popular now a days, due to increase in the energy demand and it also reduces the environment pollution around the world. This paper proposes a reduced switches count of five-level H-bridge inverter with integrated boost converter in solar PV system. The proposed 5-level reduced switches count H-bridge MLI configuration requires less no.of power semiconductor devices compared to that of conventional MLI topology. In this paper INC MPPT control technique is used, which provides a duty ratio for controlling dc-dc boost converter and allowing the PV cells to operate more efficiently and extract maximum solar energy. The phase shifted sinusoidal pulse width modulation (PSCPWM) control technique is used for controlling the gating pulse of 5-level reduced switches H-bridge inverter. To improve the quality of PV based 5-level reduced switches h-bridge inverter output parameters mainly contribute switching losses and total harmonic distortion. The proposed model is modeled and simulated in MATLAB/SIMULINK software. Keywords: PV array, H-bridge multilevel inverter, boost converter, phase shifted PWM, maximum power point tracking (MPPT), incremental conductance, total harmonic distortion (THD).

scholarly journals Performance analysis of modified dynamic voltage restorer (DVR) employed to a grid connected solar PV system

2018 ◽  
Vol 7 (3) ◽  
pp. 1351
Author(s):  
Rakeshwri Pal ◽  
Sushma Gupta
Keyword(s):  
Power Quality ◽  
Voltage Source ◽  
Voltage Sag ◽  
Solar Pv ◽  
Generation System ◽  
Pv System ◽  
Dynamic Voltage Restorer ◽  
Voltage Restorer ◽  
Dynamic Voltage ◽  
Solar Pv System

Among various power quality problems, voltage sag and swell are dominant where loads are very sensitive to the voltage disturbances. Various custom power devices are introduced recently to overcome these voltage issues, dynamic voltage restorer (DVR) is one of them. It offers very cost effective solution for problems such as voltage sag, swell and harmonics by establishing the proper voltage level during voltage disturbances to protect sensitive loads. In this paper, performance of DVR to improve power quality is done for solar photovoltaic (PV) based generation system feeding the grid and the three phase linear load. Solar PV generation system is implemented with an incre-mental conductance (IC) maximum power point tracking (MPPT) technique.  The DVR is connected in between solar PV system and load. The basic structure of DVR is modified by using the photovoltaic system as an alternative to DC source and in place of conventional 2-level voltage source converter (VSC) neutral point clamped (NPC) multi level inverter is used. The system performance is analyzed in the MATLAB/Simulink environment. The simulation results justified the efficiency of modified DVR in the mitigation of voltage sag in distri-bution system. Improvement of power quality by stabilizing voltage during fault and promoting renewable energy is the main framework of this work.  

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