User Manual
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V 1.0
2021-08-25
XDPP1100 technical reference manual
Digital power controller
Compensator
Figure 48
Pre- and post-filter BW as a function of kfp_index
6.1.2
PID term computation
The PID coefficients are computed based on the pre-filter output signals:
•
Proportional (P_term) and integral (I_term) terms are obtained from the filtered error signal verrn_filt
•
Derivative term (D_term) is computed based on verrn_slope, the derivative of the filtered error signal
The p_term and d_term are added to produce the pd_term, which is downstream-processed by the post-filter.
The high-frequency gain of the integral term is negligible compared to the proportional and derivative terms.
Therefore, no need exists for further low-pass filtering. The computation block diagram for proportional,
integral, and derivative terms is shown in
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B
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kfp_index
Compensator pre- and post-filter bandwidth (kHz)
