INITIAL CONDITIONS SUSPECT in CBEST model
hi everyone, I'm trying to add a CBEST model in my system,during the dynamics simulation here is the imformation from output bar,could someone help me understand how to resolve it,thanks.
INITIAL CONDITIONS SUSPECT:
I DSTATE(I) STATE(I) MODEL STATE BUS# X-- NAME --X BASKV ID
6460 1.1000 0.0000 CBEST K+3 2 ESSG 22.800 1
CBEST dynamics data
value descrption 1 PMAX (pu on MBASE) 1.1 OutEff (>= 1) Output Efficiency
0.9 InpEff (<= 1) Input Efficiency 1.2 IACMAX (pu)
100 KAVR, AVR gain
0 T1, AVR time constant (sec)
1 T2, AVR time constant (sec)
0.05 T3, AVR time constant (sec) ( >0 )
10 T4, AVR time constant (sec)
1 VMAX, AVR speed limit (pu)
-1 VMIN, AVR speed limit (pu) ( <0 )
0.025 DROOP (pu)
Comments
It is better to show the load flow data for the generator and the dynamic data for CBEST.
thanks your reply,here is the dynamics data I set.And the load flow data I only set Pgen into 100MW others parameter I use the default value.
check the limits on that model. that state variable is exceeding some limit in the model
This is a problem caused by the initial output of the ESS not being 0MW. K+3 of the CBEST model means Energy Ouput. I think ESSG has 110MW of output. Therefore, SOC fluctuations occur, and the CBEST model recognizes them as INITIAL CONDITIONS SUSPECT.
As this is a model problem, it seems safe to ignore it,. if it is concerned, it is recommended to use the ESS model reflecting SOC. See "how to model battery energy storage in load flow and cbest modelling?" for details.