Less than flag - TGOV and Exciter Models

[tyler477]

May I double check some of the details in the documentation for the exciter/governor models?

Is the coefficient of the 'less than' filter - which is Z1_LTLL - always equal to 1? What is its nominal value in (for instance) the TGOV1 model?

[cuihantao]

Its value should be evaluated on the fly. Z1 equals 1 means the “less than” evaluate to true. On Nov 18, 2024, at 10:00 PM, tyler477 ***@***.***> wrote: May I double check some of the details in the documentation for the exciter/governor models? Is the coefficient of the 'less than' filter - which is Z1_LTLL - always equal to 1? What is its nominal value in (for instance) the TGOV1 model? —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[tyler477]

Great. What is the purpose of {z1_LTLL}^2 then? is there a missing coefficient? or is the point of this to ensure a positive value?

For example, in the TGOV1 equation for y_LL:

y_LL=T_2 (-xprime_LL+y_LAG )+T_3 (xprime_LL-y_LL)+(z_1^(LT_LL ) )^2 (-xprime_LL+y_LL )

To write this logic back:
The flag is comparing xprime_LL and y_LL

If the last timestep passes the flag, xprime_LL<y_LL, then (z_1^(LT_LL ) )^2=1

Else (z_1^(LT_LL ) )^2=0 

Would this be right? The flag essentially determines whether (z_1^(LT_LL ) )^2 (-xprime_LL+y_LL ) is included in this step?