Enhanced Stability and Power Quality Control of LCL-GCI Under Weak Grid Conditions Using THQVC
Also Available Domains DC - AC Converters
Objective
The main objective of this paper is to develop and implement LCL filtered grid-connected inverters (LCL-GCI), third harmonic quadrature voltage control (THQVC), non-linear behavior of the phase-locked loop (PLL), distorted voltage , at the point of common coupling (PCC), and affects the overall system performance. To mitigate these challenges, the THQVC controller was designed to regulate the q-axis voltage at the PCC, ensuring that the voltage remains sinusoidal.
Abstract
This paper proposes the stability and power quality issues of LCL-filtered grid-connected inverters (LCL-GCI) under weak grid conditions and introduces a novel control strategy, THQVC, to address these problems. The instability caused by PLLs in conventional controllers under weak grids leads to voltage distortion and poor system performance. The THQVC controller, by regulating the q-axis voltage at the PCC, aims to maintain sinusoidal voltage and enhance stability. The study utilizes small-signal modelling, Nyquist criterion analysis, and simulations, demonstrating that the THQVC controller maintains stability and reduces THD under weak grid conditions, unlike conventional controllers.
Keywords: Grid, Inverter, PI controller, Phase-Locked loop, Power Quality.NOTE: Without the concern of our team, please don't submit to the college. This Abstract varies based on student requirements.
Block Diagram
Specifications
Software Configuration:
Operating System : Windows 7/8/10
Application Software: Matlab / Simulink
Hardware Configuration:
RAM : 8 GB
Processor : I3 / I5 (Mostly prefer).Learning Outcomes
· Introduction to Matlab/Simulink
· How to start with MATLAB
· About Matlab language
· About tools & libraries
· Application of Matlab/Simulink
· Basics on Matlab/Simulink
· We can learn about power quality improving
· We can learn about stability analysis tools
· We can learn about PLL
· We can learn about LCL
· We can learn about PI Controller
· We can learn about weak grid challenges
· Project Development Skills:
o Problem analyzing skills
o Problem solving skills
o Creativity and imaginary skills
o Programming skills
o Deployment
o Testing skills
o Debugging skills
Project presentation skillsDemo Video
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