Having problem with VSI controller

Hi, i am trying to apply a controller for VSI to control PQ so that the grid voltage can be maintained at the same as the pulse load is connected to the grid. At the same time the DC link voltage is maintained at 400V. However, the controller seems doesnt work at all. I feel like there is a problem witth my controller block but i cant tell where is the problem. So is there anything wrong with my controller? Attached the MATLAB file.

Answer 1

[Sabin]

There are a few fundamental issues with the model. First, a DC voltage source is used to keep the DC-link voltage constant. Therefore, there is no need to add a vdc controller in this instance as you want to control the PQ on the grid side. Check some of existing in-product examples.

https://mathworks.com/help/sps/ug/grid-tied-inverter.html

https://mathworks.com/help/sps/ug/grid-tied-inverter-current-control.html