Step by step implementation of 3 MW Grid-connected Solar PV System
System Components
1. PV Array Configuration
To achieve optimal performance, we will connect the solar panels in a specific configuration. This setup involves:
11 panels in series, with 1300 parallel strings.
Ensuring the maximum power point is properly managed.
2. Boost Converter Setup
The boost converter plays a critical role in converting the low DC voltage from the PV array to a higher voltage suitable for grid connection. Key components include:
RLC Series Branch: For the conversion process.
IGBT Switches and Diodes: For controlling the power flow.
Output Capacitors: To stabilize the voltage output.
3. Maximum Power Point Tracking (MPPT)
To maximize the energy harvested from the PV panels, we will implement an MPPT algorithm. This will involve:
Monitoring voltage and current from the PV array.
Adjusting the duty cycle to optimize power extraction.
Inverter Section
4. Inverter Design
The inverter is essential for converting DC to AC for grid compatibility. This section includes:
Universal Bridge Design: Utilizing IGBT and diodes.
Voltage Measurement: To ensure accurate monitoring of the inverter output.
Inductive Filtering: To smooth the AC output before it reaches the grid.
5. Control Logic Implementation
Control logic is vital for maintaining system stability and efficiency. This includes:
DC Link Voltage Control: Keeping the voltage constant at around 600 V.
PID Controllers: To regulate current and voltage based on real-time measurements.
Performance Evaluation
6. System Simulation and Measurement
Once the system is set up, simulation tools will be used to analyze performance metrics such as:
Aggregate voltage and current.
Inverter output and grid input.
Real power measurements from both inverter and grid sides.
7. Adjustments Based on Environmental Factors
Finally, the system's performance will be tested under varying irradiation levels. For example:
At 500 W/m², we can expect the power output to stabilize at approximately 1.5 MW, demonstrating the system's adaptability to changing environmental conditions.