how to solve the error regarding constraint relax in linear analysis tool
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I am using Linear Analysis Tool to find the linearized state space model for any power system model. I took the snapshot at t=2, It creates a op_snapshot1 variable in linear analysis workspace and I trim the model; I got the following error:
" Optimizing to solve for all desired dx/dt=0, x(k+1)-x(k)=0, and y=ydes.
(Maximum Error) Block --------------------------------------------------------- (3.74474e+02) power_wind_dfig/Plant 2 MVA/1.68 MW 0.93 PF 2300 V/Mechanical model/Phasor Tm input/Rotor angle thetam (3.74474e+02) power_wind_dfig/Plant 2 MVA/1.68 MW 0.93 PF 2300 V/Mechanical model/Phasor Tm input/Rotor angle thetam
*Could not find a solution that satisfies all constraints. Relax the constraints to find a feasible solution._***
An operating point op_trim1 has been added to Linear Analysis Workspace."
Kindly help to how to solve the error.
Thanx in advance. Regards Kiran Gajrani
1 Kommentar
Arkadiy Turevskiy
am 12 Mär. 2013
It is hard to say what is happening without knowing what exactly you are doing. How are you specifying trimming conditions -i.e., which states should be at steady state, which state values should be fixed to known values? Are the specs you are asking for realistic and feasible?
Why can't you use a snapshot as your operating point for linearization?
Antworten (2)
Arkadiy Turevskiy
am 27 Sep. 2013
It is hard to say what is happening without knowing what exactly you are doing. How are you specifying trimming conditions -i.e., which states should be at steady state, which state values should be fixed to known values? Are the specs you are asking for realistic and feasible?
Why can't you use a snapshot as your operating point for linearization?
0 Kommentare
Veeranna
am 19 Jun. 2023
I am using Linear Analysis Tool to find the linearized state space model for any power system model. I took the snapshot at t=2, It creates a op_snapshot1 variable in linear analysis workspace and I trim the model; I got the following error:
" Optimizing to solve for all desired dx/dt=0, x(k+1)-x(k)=0, and y=ydes.
Optimizing to solve for all desired dx/dt=0, x(k+1)-x(k)=0, and y=ydes.
(Maximum Error) Block
---------------------------------------------------------
(3.46837e+05) GSC_dq_KURUVA/Subsystem/Integrator1
(3.46837e+05) GSC_dq_KURUVA/Subsystem/Integrator1
Could not find a solution that satisfies all constraints. Relax the constraints to find a feasible solution.
*Could not find a solution that satisfies all constraints. Relax the constraints to find a feasible solution._***
Kindly help to how to solve the error.
@ Please find the screen shot for operating points.
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