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CCS/TMS320F28377S: ABC to DQ0 Current Transformation

Part Number: TMS320F28377S


Tool/software: Code Composer Studio

Hi everyone!

I'm trying to do the current control for my three-phase inverter for a PV grid connected system. I'm using the SPLL SRF from the Solar Library and my own SPLL with similar results, but when I try to use de ABC to DQ0 transformation with ABC normalized currents, the currents are not constant, Id and Iq are varying like sinusoidal waves. I don´t know why I can't get the correct dq values. However, the ABC to DQ0 transformation for ABC voltages are correct!

Hoping for your soonest responses! Thanks!

PS: Sorry for my English. If the idea isn't clear, please let me know.