Modern Power Converters Modeling Techniques _ Using Matlab Simulink

    This example shows the operation of several types of power electronics converters that can be simulated using one of four selectable modeling techniques.

Modeling Techniques Description

You can run this simulation using one of the following modeling techniques:

1. Switching Devices: Converters are modeled using standard SPS power switches and diodes controlled by firing pulses which are produced by the PWM generators.

2. Switching Function: Converters are modeled using a switching-function model controlled by firing pulses which are produced by the PWM generators.

3. Switching Function (PWM averaging): Converters are modeled using a switching-function model controlled by averaging the firing pulses produced by the PWM generators over a specified period.

4. Reference-Voltage (Uref or D-Controlled): Converters are modeled using a switching-function model directly controlled by the reference voltage (Uref) or the duty-cycle (D). PWM generators are not required.

Technique 1 is the most accurate modeling technique, while technique 4 yields to the fastest simulation. Techniques 2 and 3 are well-suited for real-time simulation.

Simulation

During the simulation, the DC variable load will vary from 125 kW to 350 kW at 5 Hz. At 0.5 s, the DC motor speed setpoint is changed from 1200 to 800 RPM. At 0.6 s, the STATCOM reference (Qref) is changed from -1 Mvar to +1.5 Mvar. 

Run the simulation and observe the resulting signals on the various scopes. Select a different modeling technique and rerun the simulation, comparing results with previous runs.

Click Here to download the Simulink mOdel: https://drive.google.com/file/d/1MoJl...