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There are several methods to control power flow in power systems:
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The maximum power flow for lossy transmission lines is derived using ABCD parameters in phasor form. These parameters create a matrix relationship between the sending-end and receiving-end voltages and currents, allowing the determination of the receiving-end current. This relationship facilitates calculating the complex power delivered to the receiving end, from which real and reactive power components are derived.
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Improving Power Quality in Grid-Connected Photovoltaic Systems: A Comparative Analysis of Model Predictive Control in

Saliha Gada1, Arezki Fekik2, Miroslav Mahdal3

  • 1Laboratoire de Conception et Conduite des Systèmes de Production, Faculté de Génie Électrique et d'Informatique, Université Mouloud Mammeri, Tizi-Ouzou 15000, Algeria.

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Summary
This summary is machine-generated.

This study compares two solar inverter types, finding the 3-level inverter superior for grid-connected solar power systems. It offers better power quality with lower Total Harmonic Distortion (THD) under varying solar conditions.

Keywords:
2L−3PVSI inverter3L−3PNPC invertercost functionfinite set model predictive controlincremental conductancemaximum power point trackingphotovoltaic systems

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Area of Science:

  • Electrical Engineering
  • Renewable Energy Systems
  • Power Electronics

Background:

  • Single-Stage Grid-Connected Solar Photovoltaic (SSGC-SPV) systems are crucial for efficient solar energy utilization.
  • Reducing losses and installation costs are key drivers for SSGC-SPV topology advancements.
  • Comparative analysis of different inverter configurations is essential for optimizing performance.

Purpose of the Study:

  • To provide a comprehensive overview of SSGC-SPV system components and control strategies.
  • To compare the performance of two inverter types, 2-level 3-phase voltage source inverter (2L-3PVSI) and 3-level 3-phase NPC inverter (3L-3PNPC).
  • To evaluate the effectiveness of Finite Set-Model Predictive Control (FS-MPC) for inverter control.

Main Methods:

  • System components detailed: photovoltaic generator, inverter, Incremental Conductance Maximum Power Point Tracking (IC-MPPT), and PI regulator.
  • Comparative analysis using identical grid configuration and irradiation profiles for 2L-3PVSI and 3L-3PNPC inverters.
  • Finite Set-Model Predictive Control (FS-MPC) implemented for dynamic responsiveness and current tracking, minimizing a cost function.

Main Results:

  • The 3L-3PNPC inverter demonstrated significantly lower Total Harmonic Distortion (THD), meeting IEEE standards (<5%) across various irradiance levels.
  • The 2L-3PVSI inverter exceeded the 5% THD threshold at 200 W/m² irradiance.
  • FS-MPC effectively controlled both inverter types, maintaining a DC bus voltage of 615 V via a PI controller.

Conclusions:

  • The 3L-3PNPC inverter configuration is superior for grid-connected solar applications due to its improved power quality.
  • FS-MPC is a suitable control strategy for SSGC-SPV systems, offering excellent dynamic performance.
  • The study highlights the importance of inverter selection for achieving high-quality power feed-in to the grid.