Power System Stabilizers

Notes

The power system stabilizer systems data comes from ElmDsl section in the DGS-XML file. The following tables outline the required parameters for each power system stabilizer system that is accessible through Native Library.
Parameter "IPB" for all Stabilizer models and "Kd" for the ones with input code are not imported.
The version of the stabilizer components can be determined using the following pattern:

Version	Type Prefix

Version	Type Prefix
PowerFactory 2022 and prior versions	pss_
PowerFactory 2023 and more recent versions	pss_PSSE_

These PowerFactory components are mapped to the IEE2ST component of the Native Library.

Parameter	Description	Acceptable Values

Parameter	Description	Acceptable Values
`K1`	Signal 1 transducer gain [pu]	Any value
`T1`	Signal 1 transducer time constant [s]
`K2`	Signal 2 transducer gain [pu]
`T2`	Signal 2 transducer time constant [s]
`T3`	First washout Derivative time constant [s]
`T4`	First washout integrate time constant [s]
`T6`	First Lead/Lag delay time constant [s]
`T5`	First Lead/Lag Derivative time constant [s]
`T8`	Second Lead/Lag delay time constant [s]
`T7`	Second Lead/Lag Derivative time constant [s]
`T10`	Three Lead/Lag delay time constant [s]
`T9`	Three Lead/Lag Derivative time constant [s]
`Ic2`	2nd Input Selector [1-6]	Integer values [1-6]
`Ic1`	1st Input Selector [1-6]	Integer values [1-6]
`IPB`	PSS base selector (1=gen MVA, 0=gen MW) [-]	Boolean value [0 or 1]
`Kd`	Derivative Factor [pu]	Any value
`Lsmin`	Signal pss minimum [pu]
`Vcl`	Lower voltage output limiter [pu]
`Lsmax`	Signal pss maximum [pu]
`Vcu`	Upper Voltage output limiter [pu]

These PowerFactory components are mapped to the IEEEST component of the Native Library.

Parameter	Description	Acceptable Values

Parameter	Description	Acceptable Values
`T2`	Lead/Lag 2nd Delay Time Constant [s]	Any value
`T1`	Lead/Lag 1st Derivative Time Constant [s]
`T4`	Lead/Lag 4th Delay Time Constant [s]
`T3`	Lead/Lag 3rd Derivative Time Constant [s]
`Ks`	Stabilizer Gain [pu]
`T5`	Stabilizer Derivative Time Constant [s]
`T6`	Stabilizer Time Constant [s]
`A1`	Filter 1st Time Constant [s]
`A2`	Filter 2nd Time Constant [s]
`A3`	Filter 3rd Time Constant [s]
`A4`	Filter 4th Time Constant [s]
`A5`	Filter 5th Time Constant [s]
`A6`	Filter 6th Time Constant [s]
`Ic`	1st Input Selector [1-6]	Integer values [1-6]
`IPB`	IPB	Boolean value [0 or 1]
`Kd`	Derivative Factor [pu]	Any value
`Lsmin/Vr_min`	Signal pss minimum [pu]
`Vcl`	Lower voltage output limiter [pu]
`Lsmax/Vr_max`	Controller Maximum Output [pu]
`Vcl`	Controller Minimum Limit [pu]

These PowerFactory components are mapped to the STAB1 component of the Native Library.

Parameter	Description	Acceptable Values

Parameter	Description	Acceptable Values
`K` _{(Ver. 22 and before)}	Stabilizer Gain [pu]	Any value
`KT`_{(Ver. 23 and after)}	K*T
`T`	Washout integrate time constant [s]
`T2`	Second Lead/Lag Derivative Time Constant [s]
`T1`	First Lead/Lag Derivative Time Constant [s]
`T1T3` _{(Ver. 23 and after)}	T₁*T₃
`T4`	Second Lead/Lag Delay Time Constant [s]
`T2T4` _{(Ver. 22 and before)}	T₂*T₄
`T3`	First Lead/Lag Delay Time Constant [s]
`HLIM`	Signal PSS Maximum [pu]

These PowerFactory components are mapped to the PSS2A component of the Native Library.

Parameter	Description	Acceptable Values

Parameter	Description	Acceptable Values
`Tw1`	1st Washout 1st Time Constant [s]	Any value
`Tw2`	1st Washout 2nd Time Constant [s]
`T6`	1st Signal Transducer Time Constant [s]
`TW3`	2nd Washout 1st Time Constant [s]
`TW4`	2nd Washout 2nd Time Constant [s]
`Ks2`	2nd Signal Transducer Factor [pu]
`T7`	2nd Signal Transducer Time Constant [s]
`Ks3`	Washouts Coupling Factor [pu]
`Ks1`	Pss Gain [pu]
`Ts1/T1`	1st Lead-Lag Derivative Time Constant [s]
`Ts2/T2`	1st Lead-Lag Delay Time Constant [s]
`Ts3/T3`	2nd Lead-Lag Derivative Time Constant [s]
`Ts4/T4`	1st Lead-Lag Delay Time Constant [s]
`T8`	Ramp Tracking Filter Deriv. Time Constant [s]
`T9`	Ramp Tracking Filter Delay Time Constant [s]
`N`	Ramp Tracking Filter [-]
`M`	Ramp Tracking Filter [-]
`Ic1/Ics1`	1st Input Selector [1-6]	Integer values [1-6]
`Ic2/Ics2`	2nd Input Selector [1-6]	Integer values [1-6]
`Kd`	Derivative Factor [pu]	Any value
`Vstmin`	Controller Minimum Output [pu]
`Vstmax`	Controller Maximum Output [pu]

These PowerFactory components are mapped to the PSS2B component of the Native Library.

Parameter	Description	Acceptable Values

Parameter	Description	Acceptable Values
`Tw1`	1st Washout 1st Time Constant [s]	Any value
`Tw2`	1st Washout 2nd Time Constant [s]
`T6`	1st Signal Transducer Time Constant [s]
`TW3`	2nd Washout 1st Time Constant [s]
`TW4`	2nd Washout 2nd Time Constant [s]
`Ks2`	2nd Signal Transducer Factor [pu]
`T7`	2nd Signal Transducer Time Constant [s]
`Ks3`	Washouts Coupling Factor [pu]
`Ks1`	Pss Gain [pu]
`Ts1/T1`	1st Lead-Lag Derivative Time Constant [s]
`Ts2/T2`	1st Lead-Lag Delay Time Constant [s]
`Ts3/T3`	2nd Lead-Lag Derivative Time Constant [s]
`Ts4/T4`	1st Lead-Lag Delay Time Constant [s]
`T8`	Ramp Tracking Filter Deriv. Time Constant [s]
`T9`	Ramp Tracking Filter Delay Time Constant [s]
`N`	Ramp Tracking Filter [-]
`M`	Ramp Tracking Filter [-]
`Ic1/Ics1`	1st Input Selector [1-6]	Integer values [1-6]
`Ic2/Ics2`	2nd Input Selector [1-6]	Integer values [1-6]
`IPB`	PSS base selector (1=gen MVA, 0=gen MW) [-]	Boolean value [0 or 1]
`Kd`	Derivative Factor [pu]	Any value
`Ts10/T10`	3rd Lead-Lag Derivative Time Constant [s]
`Ts11/T11`	3rd Lead-Lag Delay Time Constant [s]
`Vstmin`	Controller Minimum Output [pu]
`VS1min`	Input Signal 1 Minimum Limit [pu]
`VS2min`	Input Signal 2 Minimum Limit [pu]
`Vstmax`	Controller Maximum Output [pu]
`VS1max`	Input Signal 1 Maximum Limit [pu]
`VS2max`	Input Signal 2 Maximum Limit [pu]

These PowerFactory components are mapped to the STAB3 component of the Native Library.

Parameter	Description	Acceptable Values

Parameter	Description	Acceptable Values
`Tt`	Power transducer time constant [s]	Any value
`Tx1`	Filter Time Constant [s]
`Kx`	Washout Factor [pu]
`Tx2`	Washout time constant [s]
`Vlim`	Control output limiter [pu]
`IPB`	PSS base selector (1=gen MVA, 0=gen MW) [-]	Boolean value [0 or 1]

These PowerFactory components are mapped to the STAB4 component of the Native Library.

Parameter	Description	Acceptable Values

Parameter	Description	Acceptable Values
`Kx`	Washout Factor [pu]	Any value
`Tx2`	Washout Time Constant [s]
`Tb`	Lead Time Constant 2 [s]
`Tc`	Lag Time Constant 2 [s]
`Ta`	Lead Time Constant 1 [s]
`Tx1`	Lag Time Constant 1 [s]
`Te`	Output Filter Time Constant 2 [s]
`Td`	Output Filter Time Constant 1 [s]
`Tt`	Signal Transducer Time Constant [s]
`L1`	Controller Minimum Output [pu]
`L2`	Controller Maximum Output [pu]
`IPB`	PSS base selector (1=gen MVA, 0=gen MW) [-]	Boolean value [0 or 1]