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Frequency Response pv inverter

asked 2026-02-15 16:15:15 -0600

psse_user_88 gravatar image

updated 2026-02-16 02:22:15 -0600

Hi all,

I am trying to do a frequency response test for an PV inverter generic model with the following parameters on SMIB:

The response I get is: https://www.swisstransfer.com/d/782bf...


REGCA1: 0.0200 Tg, Converter time constant, second 10.0000 Rrpwr, LVPL ramp rate limit (pu/s) 0.9000 Brkpt, LVPL voltage 2 (pu) 0.5000 Zerox, LVPL voltage 1 (pu) 1.1000 Lvpl1, LVPL gail (pu) 1.1000 Volim, Voltage limit for High Voltage Reactive Current Management, pu 0.9000 Lvpnt1, High Voltage point for Low Voltage Active Current Management, pu 0.0300 Lvpnt0, Low Voltage point for Low Voltage Active Current Management, pu -1.0000 Iolim, Current limit for HVRCM, pu (< 0) 0.0100 Tfltr, Voltage filter time constant for LVRCM (s) 0.0000 Khv, Overvoltage compensation gain used in HVRCM (>=0 and < 1) 99.0000 Iqrmax, Upper limit on Rate of change for reactive curent (pu/s) -99.0000 Iqrmin, Lower limit on Rate of change for reactive curent (pu/s) 1.0000 Accel, Acc. factor for smoothing out voltage & angle calculations (>0 and <=1)


REECA1: 0.9000 Vdip (pu), low voltage threshold for reactive current injection 1.1000 Vup (pu), high voltage threshold for reactive current injection 0.0100 Trv (s), Voltage filter time constant -0.1000 dbd1 (pu), Voltage error dead band lower threshold (<=0) 0.1000 dbd2 (pu), Voltage error dead band upper threshold (>=0) 1.0000 Kqv (pu), Reactive current injection gain 1.0000 Iqhl (pu), Upper limit on reactive current injection Iqinj -1.0000 Iqll (pu), Lower limit on reactive current injection Iqinj 1.0000 Vref0 (pu), User defined reference (if 0, initialized by model) 0.0000 Iqfrz (pu), Value at which Iqinj is held following voltage dip 0.0000 Thld (s), Time that Iqinj is held at Iqfrz following voltage dip 0.0000 Thld2 (s) (>=0), Time for which IPMAX is held at faulted value 0.0100 Tp (s), Filter time constant for electrical power 0.6000 QMax (pu), limit for reactive power regulator -0.6000 QMin (pu) limit for reactive power regulator 1.1000 VMAX (pu), Max. limit for voltage control 0.9000 VMIN (pu), Min. limit for voltage control 0.3000 Kqp (pu), Reactive power regulator proportional gain 5.0000 Kqi (pu), Reactive power regulator integral gain 0.5000 Kvp (pu), Voltage regulator proportional gain 0.0000 Kvi (pu), Voltage regulator integral gain 0.0000 Vbias (pu), User-defined bias (normally 0) 0.0100 Tiq (s), Time constant on delay s4 99.0000 dPmax (pu/s) (>0) Power reference max. ramprate -99.0000 dPmin (pu/s) (<0) Power reference min. ramprate 1.0000 PMAX (pu), Max. power limit 0.0000 PMIN (pu), Min. power limit 1.0000 Imax (pu), Maximum allowable total converter current limit 0.0100 Tpord (s), Power filter time constant 0.0000 Vq1 (pu), Reactive Power V-I pair, voltage 0.0100 Iq1 (pu), Reactive Power V-I pair, current 0.4900 Vq2 (pu) (Vq2>Vq1), Reactive Power V-I pair, voltage 0.0100 Iq2 (pu ...

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answered 2026-02-15 19:14:10 -0600

haveityourwa gravatar image

updated 2026-02-15 19:14:38 -0600

Hey I think I'd be able to help if you post a list of the parameters of the model settings and there values. Another thing I would suggest based on the frequency profile and power response is to slow down the ramp rate and make the change over a longer period of time as there seems to be some delay in activation and frequency limit and the controller internally is winding on some initial error and the frequency may already be beyond the maximum limit for the total power change due to a frequency event.

1hz increase over 100seconds to see if the response to the frequency event becomes linear, after what looks like ~3s delayed activation period.

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Asked: 2026-02-15 16:15:15 -0600

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Last updated: 13 hours ago