Detailed Model of a 100-kW Grid-Connected PV Array ,,,command to run =power_PVarray_grid_det | can any one help me understand this three-phase three-level Voltage Source Converter (VSC). what is dq method why PLL use ? ADC to DQ

Answer 1

[Sabin]

A PLL is used to synchronize the converter with the grid. PLL is used to get the grid frequency and angle. The angle is needed to transform 'abc' quantities into a rotating reference frame 'dq'. The 'abc' quantities are AC sinusoidal quantities, the dq quantities are the transformed quantities in a rotating reference frame and they are DC. It is much easier to do the control in dq reference frame. Some additional informations can be found on:

https://mathworks.com/discovery/grid-tied-inverter.html

I hope this helps.