I suggest you may follow similar query here : Conference Paper A Study on Anti-Islanding Detection Algorithms for Grid-Tied...

Conference Paper Modeling and simulation of reverse power relay for generator...

I do not know exact direction of your research in the field of detecting island operations of synchronous generator. For that issue you can use phasor measurement technology also. Phasor measurement units (PMU) can be implemented also on distribution level. It can be some small version of PMU, which has appropriate functionality and price for this voltage level. Simulations of phasor measurement data in Simulink can be done very nice. From that kind of simulations, you can learn a lot about a nature of islanding events in distribution network.

Please read the following journal:

https://ieeexplore.ieee.org/document/9057583

These publications are sure to help

1. https://www.researchgate.net/figure/Simulink-model-of-the-vector-shift-protection_fig8_262568520

2. https://www.researchgate.net/publication/262568520_A_Study_on_Anti-Islanding_Detection_Algorithms_for_Grid-Tied_Photovoltaic_Systems/download

3. https://ieeexplore.ieee.org/abstract/document/8089205/

Dear friends! First of all, thanks for all your attention!

Just I'm quite of uncomfortable with this issue.

Let me better explain!

In the paper of the following link and in many others, from what I have understood, are wrote that the Vector Jump relay should compare the period of the actual cicle with the period of last cicle and then, check the deviation the the period between the actual cicle and last cicle. From this would be calculated the angle deviation and so, the vector jump. It is not what is done in the paper described listed by Fortune Amanze and Muhammad Ali . On this paper the period of each cicle is compared with a predefined reference period time.

Conference Paper Advanced Vector Shift Algorithm for Islanding Detection

Another point is on the paper of the following link, it is wrote a procedure to check the angle to be adjusted in the vector shift relay and also the triggering time. I've tried to make a simulation computing the time variation between the actual and last period as described in some papers, but, the results are been far from what is wrote in this paper.

Article A Practical Method for Assessing the Effectiveness of Vector...

Igor Ivankovic , Sheikh Tanzim Meraj one of the biggest distribution companies over here (COPEL) request in the access documents to use vector shift relays, so, that is why I'm focused on this procedure.

So, something that seems to be easy are making me unconfortable. I'm intending to make some research using the Vector Jump really and, as the Matlab/Simulink is the software we have available, I would like to use it, but, I'm not finding some secure document explaining how to make it.

If anybody has any hint I'm always thankfull!

Ok, so you need to make some sort of relay model in Simulink. Look on what values Vector Shift Relay operate, amplitude, angle and some others. Model that kind of measurements in your relay model, which is a part of your power system model. Also, put recording part that you can easily trace all values.

I also agree with @Igor Ivankovic .You need to find the paramaters regarding your vector relay. If you want to find the trigerring time or delay time always remember that most of the researchers use Discrete Time analysis with fixed step when modelling in MATLAB. Another suggestion, go for mathematical modelling instead of using builtin model blocks from MATLAB. Predefined reference time is often compared to check the error in the actual system since, the predefined time is the one your system should follow.