Can anyone explain how to create (short-circuit) overcurrent in Matlab simulink?

Hello.

I am a student, trying to make the overcurrent analysis in PV integrated LLC resonant DC/DC converter and trying to design the fault-tolerant one for my graduation thesis paper. But the problem that I am facing with is that I don't know how to create overcurrent in it. Can anyone please teach me which block in Matlab can I use to create overcurrent or fault in LLC resonant converter?

Answer 1

[Kunal Kandhari]

Hi Myat,

There are multiple ways to simulate an overcurrent or fault condition in an LLC resonant converter, some of them:

1. Current Source Block with Step Input:

• Insert Current Source Block: Current Source block under Simscape > Foundation Library > Electrical > Electrical Sources.
• Configure Current Source:Double-click on the Current Source block, set the current value to a higher value than the normal operating range to simulate an overcurrent condition.
• Add Step Block: Find the Step block under Simulink > Sources, place the block in your model and connect it to the control input of the Current Source block to change its value at a specific time.
• Run the Simulation: Configure the simulation parameters and run the model.

2. Fault Breaker Block:

• Insert Fault Breaker Block: Fault Breaker block under Simscape > Power Systems > Specialized Technology > Fundamental Blocks > Elements.
• Configure Fault Breaker: Double-click on the Fault Breaker block, set the parameters to define the type of fault and specify when it should occur (e.g., at a particular simulation time or based on a control signal).
• Control the Fault: Use a Step block or another control signal to trigger the fault at a specific time.
• Run the Simulation: Configure the simulation parameters and run the model.

By using either of these methods, you can effectively simulate overcurrent or fault conditions in your LLC resonant converter model in Simulink.