MATLAB Simulation of 5 MW Grid Connected PV System with Incremental Conductance MPPT
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MATLAB Simulation of 5 MW Grid Connected PV System with Incremental Conductance MPPT
Looking for a high-power solar PV simulation model in MATLAB/Simulink? This model demonstrates a 5 MW grid-connected PV system integrated with a boost converter, Incremental Conductance MPPT, DC link control, and grid-side inverter control. It is useful for students, researchers, and engineers who want to understand large-scale solar power integration in a simple and practical way.
𝐈𝐧𝐭𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐨𝐧
5 MW Grid Connected PV System with Incremental Conductance MPPT
A grid-connected PV system converts solar energy into electrical energy and injects it into the utility grid. In this model:
A 5 MW solar PV array is used as the primary energy source.
A boost converter is used to regulate the PV-side voltage.
An Incremental Conductance MPPT algorithm tracks the maximum power point.
A grid inverter transfers the available solar power to the grid.
A DC link voltage controller keeps the DC bus stable.
This simulation is especially helpful for learning how large-scale PV systems behave under different irradiance conditions.
𝐒𝐲𝐬𝐭𝐞𝐦 𝐎𝐯𝐞𝐫𝐯𝐢𝐞𝐰
The overall system contains the following major sections:
PV Array
Boost Converter
Incremental Conductance MPPT Controller
DC Link Capacitor
Three-Phase Grid Inverter
Filter
PLL-based dq Control System
Measurement Blocks for PV, inverter, and grid parameters
Main System Flow
Solar PV array generates DC power.
MPPT controls the boost converter duty cycle.
Boost converter maintains proper PV operating point and raises voltage.
DC link stores and stabilizes energy at the required DC bus value.
Grid inverter converts DC to AC.
Filter smooths the inverter output.
Controlled AC power is injected into the three-phase grid.
𝐖𝐨𝐫𝐤𝐢𝐧𝐠 𝐏𝐫𝐨𝐜𝐞𝐬𝐬
Step-by-step operation
The PV array receives irradiance and temperature as inputs.
The PV voltage and current are measured continuously.
The MPPT algorithm checks the change in voltage and current.
Based on the tracking logic, it updates the duty cycle.
The duty cycle is passed to the PWM generator.
The PWM pulses control the IGBT in the boost converter.
The boost converter helps the PV array operate near the maximum power point.
The DC link voltage is maintained at a constant reference.
The inverter uses control signals to inject real power into the grid.
Grid voltage, current, inverter voltage, inverter current, power, duty cycle, and modulating signals are monitored.
𝐂𝐨𝐧𝐭𝐫𝐨𝐥 𝐒𝐭𝐫𝐚𝐭𝐞𝐠𝐲
1) MPPT Control
The system uses Incremental Conductance MPPT to extract maximum solar power.
Inputs to MPPT:
PV voltage
PV current
Output from MPPT:
Duty cycle
Purpose:
Track the maximum power point
Reduce power loss due to irradiance changes
Maintain efficient PV operation
2) Boost Converter Control
The boost converter is controlled using:
MPPT-generated duty cycle
PWM switching pulses
Purpose:
Adjust PV operating voltage
Raise the PV output voltage toward the DC link requirement
3) DC Link Voltage Control
A PI controller is used to maintain the DC link voltage.
Purpose:
Keep DC voltage stable at the desired reference
Support proper inverter operation
4) Inverter Control
The inverter uses a combination of:
Voltage control
Current control
dq0 transformation
PLL synchronization
Purpose:
Synchronize with the grid
Control real power injection
Generate proper three-phase modulating signals
𝐒𝐲𝐬𝐭𝐞𝐦 𝐏𝐚𝐫𝐚𝐦𝐞𝐭𝐞𝐫𝐬
Parameter | Value |
PV system rating | 5 MW |
PV modules in series | 11 |
Parallel strings | 2.1325 × 10³ |
Single panel power | 213.15 W |
Voltage at maximum power point | 29 V |
Current at maximum power point | 7.35 A |
Open-circuit voltage | 36.3 V |
Short-circuit current | 7.84 A |
PV terminal voltage at STC | 319 V |
DC link voltage | 800 V |
Grid voltage | 400 V |
Grid frequency | 50 Hz |
𝐌𝐏𝐏𝐓 𝐈𝐧𝐩𝐮𝐭𝐬 𝐚𝐧𝐝 𝐂𝐨𝐧𝐟𝐢𝐠𝐮𝐫𝐚𝐭𝐢𝐨𝐧
MPPT Item | Description |
Inputs | PV voltage, PV current |
Output | Duty cycle |
Adjustable parameters | Initial duty cycle, maximum duty cycle, minimum duty cycle |
Step settings | Increment and decrement change in duty cycle |
Initial stored values | Previous voltage, previous current, previous power, previous duty cycle |
𝐒𝐢𝐦𝐮𝐥𝐚𝐭𝐢𝐨𝐧 𝐑𝐞𝐬𝐮𝐥𝐭𝐬
The model is tested under two irradiance conditions to observe system behavior.
Observed Performance Table
Condition | PV Voltage | PV Current | PV Power | DC Link Voltage | Observation |
1000 W/m² | ~319 V | ~15 kA | ~5 MW | ~800 V | System reaches near maximum power point |
500 W/m² | ~300 V | ~7.5 kA | ~2.5 MW | ~800 V | Power reduces due to lower irradiance |
What the results show
At 1000 W/m², the PV system delivers nearly 5 MW.
The PV voltage stays close to the expected operating value.
The MPPT adjusts the duty cycle automatically.
The DC link voltage remains around 800 V, showing good voltage regulation.
When irradiance is reduced to 500 W/m², the PV current and power decrease.
Grid current and inverter current also reduce with lower solar input.
The system still remains stable and synchronized with the grid.
Measured Outputs in the Model
PV voltage
PV current
PV power
Duty cycle
Grid voltage
Grid current
Inverter voltage
Inverter current
Grid power
Inverter power
Modulating signal
DC link voltage
𝐊𝐞𝐲 𝐅𝐞𝐚𝐭𝐮𝐫𝐞𝐬
5 MW large-scale PV system modeled in MATLAB/Simulink
Incremental Conductance MPPT for effective maximum power tracking
Boost converter based PV-side power conditioning
800 V DC link regulation
Three-phase grid-connected inverter
PLL-based dq control
Voltage and current control loops
Performance verification under multiple irradiance conditions
Useful output waveforms for analysis and learning
Suitable for academic, technical, and research study
𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬
This simulation model can be used for:
Solar PV system analysis
Grid integration studies
MPPT performance evaluation
Power electronics learning
Renewable energy research
Control system design studies
MATLAB/Simulink training
Large-scale PV plant behavior analysis
𝐖𝐡𝐲 𝐭𝐡𝐢𝐬 𝐦𝐨𝐝𝐞𝐥 𝐢𝐬 𝐮𝐬𝐞𝐟𝐮𝐥
For students
Understand the structure of a grid-connected solar PV system
Learn how MPPT and inverter control work together
Visualize important waveforms and operating conditions
For researchers
Study control performance under irradiation change
Use the model as a base for advanced controller development
Explore system behavior under different operating scenarios
For engineers
Review the working of a high-power PV-grid interface
Analyze DC link, inverter, and grid-side control
Use it as a reference for simulation-based validation
𝐂𝐨𝐧𝐜𝐥𝐮𝐬𝐢𝐨𝐧
The MATLAB Simulation of 5 MW Grid Connected PV System with Incremental Conductance MPPT is a practical and informative model for understanding large-scale solar energy conversion and grid integration. It clearly demonstrates:
Maximum power extraction from the PV array
Boost converter control using MPPT
Stable DC link voltage regulation
Grid synchronization and power injection
System response under irradiance variation
If you want a clean and educational model for learning PV system operation, MPPT control, and grid-connected inverter behavior, this simulation is a very useful choice.
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