5 MW Grid Connected PV System With Incremental Conductance MPPT
Welcome to LMS Solution! In this simulation, we will explore a 5-megawatt connected PV system employing incremental conductance Maximum Power Point Tracking (MPPT) in a boost converter. The system includes a photovoltaic (PV) array, a boost converter, a grid inverter, and a control mechanism. The simulation model aims to showcase the performance of the PV system under varying conditions, emphasizing the incremental conductance MPPT technique.
PV Array and Boost Converter:
The PV array consists of 11 modules connected in series, each containing 2,132.5 parallel strings. The specifications include a panel rating of 213.15 Watts, a voltage at maximum power point of 29 Volts, and a current at maximum power point of 7.35 Amps. The boost converter is designed to maintain a DC link voltage of 800 Volts. Key parameters, including the ripple inductor and capacitor values, are calculated based on the desired system characteristics.
Incremental Conductance MPPT:
The boost converter is controlled using the incremental conductance MPPT technique. The algorithm continually adjusts the duty cycle of the converter to ensure that the PV system operates at its maximum power point. This involves comparing the change in voltage and current with the corresponding incremental conductance values. The boost converter is driven by parameters such as irradiation and temperature, which influence the IV characteristics of the PV array.
Grid Inverter and Filter Design:
The system includes a grid inverter responsible for injecting power into the grid. A filter is designed based on the ripple inductor current and the power rating of the PV array to ensure a clean power output to the grid. The grid inverter control mechanism employs a combination of voltage and current control, enhancing the system's stability and reliability.
The simulation results showcase the PV system's behavior under different conditions, considering variations in irradiation and temperature. Key parameters such as PV voltage, current, inverter voltage, and grid power are monitored throughout the simulation. The incremental conductance MPPT algorithm ensures optimal power extraction from the PV array, maximizing the system's efficiency.
This simulation provides insights into the dynamic behavior of a 5-megawatt PV system with incremental conductance MPPT. The boost converter, grid inverter, and control mechanisms work cohesively to maintain the system's stability and maximize power output. This model serves as a valuable tool for studying the performance of large-scale PV systems and optimizing their operation under changing environmental conditions.
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