VERSION=1
%------------------------------------------------------------------------------------- 
definitions:
%------------------------------------------------------------------------------------- 
dynamic_states dV1={initial=1,unit="",description="dynamic state",display=false}
dynamic_states dV2={initial=1,unit="",description="dynamic state",display=false}
dynamic_states dEFD={initial=1,unit="",description="dynamic state",display=false}
%--------------------------------------------------------------------------
inputs VComp={initial=1,unit="",description="controlled voltage",display=true}
inputs VPSS={initial=0,unit="",description="input from PSS",display=true}
inputs VREF={initial=1,unit="",description="reference voltage",display=true}
%--------------------------------------------------------------------------
external_states EFD={initial=1,unit="exciter voltage",description="",display=true}
%--------------------------------------------------------------------------
internal_states V1={initial=1,unit="",description="internal state",display=false}
internal_states Verr={initial=1,unit="",description="internal state",display=false}
internal_states V2={initial=1,unit="",description="internal state",display=false}
%------------------------------------------------------------------------------------- 
parameters TR={initial=0.0001,unit="s",description="",display=true}
parameters TB={initial=10,unit="s",description="",display=true}
parameters TC={initial=1,unit="s",description="",display=true}
parameters KA={initial=200,unit="",description="",display=true}
parameters TA={initial=0.2,unit="s",description="",display=true}
parameters EFDMAX={initial=5,unit="pu",description="",display=true}
parameters EFDMIN={initial=-5,unit="pu",description="",display=true}
parameters VSTEP={initial=0,unit="",description="",display=false}
%--------------------------------------------------------------------------
initializations:
%--------------------------------------------------------------------------
%------------------------------------------------------------------------------------- 
f_equations:
%-------------------------------------------------------------------------------------
%-------------------------------------------------------------------------------------
g_equations:
%------------------------------------------------------------------------------------- 
g01 = V1 - lag(VComp,dV1,1.0,TR,none,none)
g02 = Verr - ((VREF+VSTEP)- V1+ VPSS)
g03 = V2 - leadlag(Verr,dV2,1.0,TC,TB,none,none)
g04 = EFD - lag(V2,dEFD,KA,TA,EFDMIN,EFDMAX)
%-------------------------------------------------------------------------- 
h_equations:
%--------------------------------------------------------------------------

%--------------------------------------------------------------------------
checklimits:
%--------------------------------------------------------------------------

%--------------------------------------------------------------------------
checkparameters:
%--------------------------------------------------------------------------
if ( KA == 0 )
    print('KA is ZERO, must STOP')
    STOP
end