Incremental Conductance with PI Controlled MPPT in MATLAB
In this blog, we delve into the configuration of a photovoltaic (PV) system and the design of a boost converter to optimize power output. The specifics include the values of open circuit voltage, maximum voltage, charge circuit current, and the maximum power point current.
Boost Converter Design Parameters
Designing the boost converter involves calculations based on the boost conversion equation, input voltage, switching frequency, and output voltage (fixed at 120V). It incorporates parameters like inductor and capacitor values to facilitate the conversion process.
PV MPPT (Maximum Power Point Tracking) Algorithm Implementation
Utilizing the Incremental Conductance MPPT algorithm, the model adjusts the voltage conditions based on calculated parameters, keeping a balance between maximum and minimum voltage values. The algorithm analyzes and adjusts the voltage reference point to ensure maximum power extraction, even under variable conditions.
MATLAB Simulation & Plant Identification
A MATLAB simulation with plant identification demonstrates how data is simulated and then identified to create a transfer function model. This model is then tuned using Auto Estimate or other plant identification methods to achieve optimal control and response.
Tuning the System
The system tuning involves identifying the plant via methods like Auto Estimate and adjusting the response parameters to fine-tune the system for optimal performance. The Transfer Function model aids in modeling the system's response to varying conditions, such as changing radiation or load, to ensure the extraction of maximum power from the PV system.
Testing the System with Variable Conditions
The system is tested under variable conditions, such as fluctuating irradiation and changing loads. The simulation showcases how the PV system and boost converter adapt to ensure maximum power output even with changing environmental parameters.
Conclusion: Optimization and Performance Evaluation
The design, implementation, simulation, and testing demonstrate the effectiveness of the PV system's maximum power extraction and the boost converter's role in maintaining efficient power output. With meticulous tuning and iterative testing, the system shows adaptability and performance even under fluctuating conditions.
The content provides insights into the PV system's design, MPPT algorithm implementation, boost converter configuration, and MATLAB simulation to fine-tune and optimize the system's performance. It highlights the adaptability and efficiency of the system under variable environmental conditions and load fluctuations.