Improved Linear Sinusoidal Tracer Based Control for Three-Phase VSC in Photovoltaics

In thisPhase chapterPhotovoltaic, aImproved linear sinusoidal tracer three-phasePhase photovoltaicPhotovoltaic (PV) system is introduced which is designed for gridGrid connection that serves two purposes: feeding extracted solar energySolar energy into the gridGrid and improving power qualityPower quality within the distribution systemDistribution system. The system achieves tracking of the maximum power pointMaximum Power Point by using a variable DC link voltageVariable DC link voltage and an instantaneousInstantaneous compensation technique to ensure a fast dynamic responseDynamic response to changes in PV powerPower. Additionally, the system featuresFeatures a three-phasePhase voltage source converterVoltage source converter (VSC) that performs the functions of inputting energyEnergy from photovoltaicsPhotovoltaic that further goes to the main gridGrid, mitigating harmonicsHarmonics from loadsLoad connected at the point of common couplingPoint of common coupling (PCC), and balancingBalancing the grid currentsGrid currents. To control the VSC, this study proposes an improved linear sinusoidal tracerImproved linear sinusoidal tracer (ILST)-based algorithmAlgorithms. Simulation is used to test the result of both the system as well as the algorithmAlgorithms being used. Results confirm the efficacy of the system and its control algorithmAlgorithms in achieving efficient and effective maximum power point trackingMaximum Power Point Tracking (MPPT), feeding SPV energyEnergy into the gridGrid, mitigating harmonicsHarmonics, and balancingBalancing grid currentsGrid currents. Subsequently, the proposed solarSolar photovoltaicPhotovoltaic (SPV) system and control algorithmAlgorithms are implemented in a three-phasePhase distribution systemDistribution system. The outputs indicate a highly effective system in feeding the energyEnergy from the system into the main gridGrid while keeping the harmonicsHarmonics in control and balancingBalancing grid currentsGrid currents, thereby improving power qualityPower quality. The VSC continuously tracks the maximum power pointMaximum Power Point of the PV panels, operates efficiently, and maximizes the utilization of the VSC. In summary, this study presents a novel three-phasePhase SPV system that provides an efficient solution for integrating SPV systems into the gridGrid while maintaining high power qualityPower quality. The system achieves MPPT by utilizing a variable DC link voltageVariable DC link voltage and instantaneousInstantaneous compensation technique, while the three-phasePhase VSC performs multiple functions, including feeding SPV energyEnergy into the gridGrid, mitigating harmonicsHarmonics, and balancingBalancing grid currentsGrid currents. The ILST algorithmAlgorithms designed for the control of the system ensures that the VSC operates efficiently and effectively. The system's efficacy is validated using MATLABMATLAB and Simulink simulations and by implementing it in a three-phasePhase distribution systemDistribution system.