For rectifier and inverter connected back to back via dc link capacitor, if SVM scheme is implemented to rectifier, instead of applying to inverter. What changes need to be their? Can anybody please explain this to me?
In back-to-back converter, one converter operates as an inverter and the other one as an rectifier. Only difference I think would be the current direction. I think you are probably using Field Oriented Control (FOC) for controlling current. So you can switch your inverter operation to the rectifying operation just changing the reference current direction. For example if your reference current Iq=+10A, change it with -10A. Thats all. it will be rectify power.
If you are using Space Vector Modulation in an unidirectional rectifier, then you need to consider the current vector instead of the voltage vector to identify the sectors (or sextants) of the applicable vectors. This occurs because for certain current vector angles it is not possible to apply any given voltage vector. in practice, the voltage vector angular position is used. This is ok for unity power factor rectifiers that have small inductors, i.e., low voltage drop across the ac inductors.
If it is a bidirectional rectifier then there are actually no changes required.
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