I want to ask about PSS and SSSC optimization for grid with DFIG

Hello, I am simulating a power network that includes two synchronous generators and a wind plant modeled with the Wind Turbine Doubly-Fed Induction Generator (DFIG) block. I am using a FACTS SSSC and PSS to damp power oscillations. While tuning the PSS and SSSC parameters, the oscillations are reduced; however, the response does not track the pre-disturbance/reference value—it shows a bias/DC offset (i.e., it deviates from the original operating point). I’m not sure what I’m doing wrong. Could someone please help?

Answer 1

[Sam Chak]

Hi @Thuong

When the response is stable but exhibits a DC offset, compensating the bias with integral action on the error signal (the difference between the reference value and the measured output) is often the initial remedial measure.