simulation of LL fault in PV array

how to simulate short circuit between two points in PV array?

[Katuri]

brother did you get the answer

Answer 1

[Shivam Gothi]

Hello,

The short circuit can be simulated in Simulink by using “breaker” block of Simulink. We can control the opening and closing of Breaker by passing external logical signal. When logic “0” is passed, the breaker contacts are open and when logic “1” is passed, the breaker contacts are open.

In order to create a short circuit across DC bus of PV array, connect the “breaker” across DC bus of PV array, as shown in the below figure.

The opening and closing of the breaker is controlled by the block named “Breaker closing command”. This blocks generates logical “0” for time (0 < t < 0.5s) and logical “1” when the time is greater than 0.5 seconds.

The voltage and current measuring blocks are also added to see the voltage and current data at the scope.

Below given figure shows the voltage and short circuit current, following a fault.

After fault, the DC bus voltage of PV array drops nearly to zero and step rise in current can be seen.

I hope this answers your query.