How to set non linear of 50kVA in matlab simulation?

Load 50kVA non linear

Vrms 380 V

to create voltage swell

Answer 1

[Shubham]

Hi Manish,

To simulate a 50 kVA non-linear load in MATLAB that can create a voltage swell, you would typically use Simulink, which is a part of MATLAB designed for modeling, simulating, and analyzing dynamic systems. Below are the steps to set up a non-linear load in a Simulink model:

1. Open Simulink: First, open Simulink from MATLAB by typing simulink in the MATLAB Command Window and pressing Enter.
2. Create a New Model: Create a new model by clicking on the "Blank Model" and then click "Create Model."
3. Add Power System Components: Use the Simulink Library Browser to add necessary components to your model. You will need components from the Simscape > Electrical > Specialized Power Systems library.
4. Set Up the Non-Linear Load: Drag and drop a "Three-Phase V-I Measurement" block and a "Three-Phase Programmable Voltage Source" to represent the power grid.
5. Implement Non-Linear Load: To create a non-linear load, you can use a combination of passive elements (inductors, capacitors) and power electronic components (diodes, thyristors, IGBTs, etc.) to simulate the non-linear behavior. You might use a "Three-Phase Series RLC Load" block and set its parameters to non-linear mode, or use a "Universal Bridge" block with a rectifying circuit.
6. Configure the Load: For a 50 kVA load at 380 Vrms, you need to calculate the equivalent impedance or current consumption of the load. Assuming a power factor (pf), the current I can be calculated as:
7. Simulate Voltage Swell: To simulate a voltage swell, you can modify the voltage of the "Three-Phase Programmable Voltage Source" to be higher than the nominal voltage for a short period. You can use a step function or a signal builder to create this transient behavior.
8. Connect the Components: Connect all the components appropriately, ensuring that the three-phase connections are correct.
9. Set Simulation Parameters: Set the simulation start and stop times, solver type, and step size according to the dynamics you want to observe.
10. Run the Simulation: After setting up the model, click the "Run" button to simulate the system.