Three phase Three level Active NPC rectifier

Three phase Three level Active NPC rectifier

This MATLAB/Simulink model presents a three-phase, three-level Active Neutral-Point-Clamped (ANPC) inverter with closed-loop control and switching-signal generation.

The model demonstrates the operation of a three-level ANPC topology and provides a simulation platform for studying multilevel inverter switching, DC-link voltage utilization, phase-current control.

Key Features

• Three-phase three-level Active NPC (ANPC) inverter
• Split DC-link capacitor configuration
• 3-level phase voltage generation
• 12-switch power-stage implementation for the three phases
• Complementary gate-signal generation
• Three-phase voltage and current measurement
• Clarke transformation (abc → αβ)
• Park transformation (αβ → dq)
• dq-axis current control using PI controllers
• DC-link voltage control
• AC-side voltage/current control
• Three-phase modulation and switching logic
• Neutral-point/DC-link voltage monitoring
• Simulation of inverter output voltage and current waveforms
• MATLAB/Simulink implementation suitable for studying multilevel power-converter control

Control Structure

The control system includes:

1. DC-link voltage control
2. dq-axis current control
3. abc–dq coordinate transformations
4. Voltage reference generation
5. Three-level switching-state generation
6. Gate pulse generation for the ANPC switches

The model also provides access to important electrical quantities such as:

• DC-link voltage balancing.
• Upper and lower capacitor voltages
• Three-phase inverter voltages
• Three-phase currents
• d-axis and q-axis currents
• αβ-axis quantities
• Switching signals

Applications

This model can be used as a starting point for research and development of:

• Multilevel inverters
• Active NPC converters
• Motor drives
• Grid-connected converters
• Renewable-energy power converters
• EV traction inverters
• High-power industrial drives
• Three-level inverter control and modulation studies

Requirements

• MATLAB 2024a