master:pss parametersPSCAD Power System Stabilizer
Every parameter of the PSCAD Power System Stabilizer (master:pss): 165 names, with the unit, the default and the meaning PSCAD gives each one. Copy a name into parameters().
What master:pss is
Power System Stabilizer, a component of PSCAD's Master Library, filed under meters and output.
- Definition
master:pss- PSCAD name
- Power System Stabilizer
- Category
- Meters and output
- Parameters
- 165, in 15 groups; 147 carry a unit
- Read from
- PSCAD 5.0.0, 2026-11-07
Read and write master:pss in Python
import mhi.pscad
pscad = mhi.pscad.connect() # the PSCAD that is open; launch() starts one
project = pscad.project("my_case") # a case loaded in the workspace
for comp in project.find_all("master:pss"): # the exact definition, namespace first
params = comp.parameters() # every parameter, as PSCAD holds it
print(str(params["A1_3"])) # Filter Coefficient [A1], in s
comp = project.find_all("master:pss")[0]
comp.parameters(A1_3="1 [s]") # a value that carries a unit is written with it- A parameter is named exactly as in the table, letter case included:
parameters()gives every one of them in a dictionary, and a name the component does not have is refused. - A value that carries a unit comes back as a number whose unit is only in its text, so read it as text first (
str(...)) or the unit is lost. PSCAD keeps a written unit as it is given:"2500 [mohm]"stays in mohm. - A Choice is read and written as its symbol (the capitals in "Written as"), not as the words PSCAD shows in the dialog.
find_all()takes the exact definition only. A wildcard or a bare name withoutmaster:comes back empty; the Builder'spx_findwalks the pages for those.
The Builder's runtime does the same with the unit handled for you: px_get(comp, "A1_3") and px_set(...), which also records the old value so the case is put back at the end. Getting started shows them.
- Pss1A: Power System Stabilizer Data12
- Pss3B: Power System Stabilizer Data: Common Path11
- Pss4B [2005]: Power System Stabilizer Data: Common Data6
- Configuration6
- Dec1A: Discontinuous Excitation Controller Data: Section 110
- Dec1A: Discontinuous Excitation Controller Data8
- Pss4B [2005]: Power System Stabilizer Data: High Frequency Band19
- Pss4B [2005]: Power System Stabilizer Data: Intermediate Frequency Band19
- Pss4B [2005]: Power System Stabilizer Data: Low Frequency Band19
- Pss2B: Pss Lead-Lag Data13
- Pss3B: Power System Stabilizer Data8
- Pss4B [1992]: Power System Stabilizer Data12
- Pss2B: Pss Signal Data14
- Dec2A: Discontinuous Excitation Controller Data6
- Dec3A: Discontinuous Excitation Controller Data2
Pss1A: Power System Stabilizer Data
| Parameter | Unit | Default | Description |
|---|---|---|---|
A1_1Real | · | 0.0 | Filter Constant [A1]At least 0 |
A2_1Real | · | 0.0 | Filter Constant [A2]At least 0 |
KS_1Real | pu | 5.0 | PSS Gain [Ks]At least 0 |
T1_1Real | s | 0.0 | 1st Lead Time Constant [T1]At least 0 |
T2_1Real | s | 6.0 | 1st Lag Time Constant [T2]At least 0 |
T3_1Real | s | 0.08 | 2nd Lead Time Constant [T3]At least 0 |
T4_1Real | s | 0.01 | 2nd Lag Time Constant [T4]At least 0 |
T5_1Real | s | 10.0 | Washout Time Constant [T5]At least 0 |
T6_1Real | s | 0.0 | Transducer Time Constant [T6]At least 0 |
VS1_1Choice | · | NONE | Input SignalWritten as NONE (None), FREQUENCY (Frequency), SPEED (Speed), POWER (Power) |
VSTN_1Real | pu | -0.1 | PSS Output Minimum Limit [VSTMIN]At most 0 |
VSTX_1Real | pu | 0.1 | PSS Output Maximum Limit [VSTMAX]At least 0 |
Pss3B: Power System Stabilizer Data: Common Path
| Parameter | Unit | Default | Description |
|---|---|---|---|
A1_3Real | s | 0.0 | Filter Coefficient [A1]At least 0Used when (IEEE_Std == 2005) |
A2_3Real | s | 0.0 | Filter Coefficient [A2]At least 0Used when (IEEE_Std == 2005) |
A3_3Real | s | 0.0 | Filter Coefficient [A3]At least 0Used when (IEEE_Std == 2005) |
A4_3Real | s | 0.0 | Filter Coefficient [A4]At least 0Used when (IEEE_Std == 2005) |
A5_3Real | s | 0.0 | Filter Coefficient [A5]At least 0Used when (IEEE_Std == 2005) |
A6_3Real | s | 0.0 | Filter Coefficient [A6]At least 0Used when (IEEE_Std == 2005) |
A7_3Real | s | 0.0 | Filter Coefficient [A7]At least 0Used when (IEEE_Std == 2005) |
A8_3Real | s | 0.0 | Filter Coefficient [A8]At least 0Used when (IEEE_Std == 2005) |
Tw3_3Real | s | 1.5 | Washout Time Constant [Tw3]At least 0Used when (IEEE_Std == 2005) |
VSTN_3Real | pu | -0.1 | PSS Output Minimum Limit [VSTMIN]At most 0 |
VSTX_3Real | pu | 0.1 | PSS Output Maximum Limit [VSTMAX]At least 0 |
Pss4B [2005]: Power System Stabilizer Data: Common Data
| Parameter | Unit | Default | Description |
|---|---|---|---|
BWI_44Real | Hz | 1.0 | 3dB Bandwidth of the Notch Filter [BWI]Range 0 to 0Used when (IncNF_44==1) |
H_44Real | s | 1.0 | Inertia Constant [H]At least 0 |
IncNF_44Choice | · | NO | Include Notch Filters?Written as NO (No), YES (Yes) |
VSTN_44Real | pu | -0.15 | PSS Output Minimum Limit [VSTMIN]At most 0 |
VSTX_44Real | pu | 0.15 | PSS Output Maximum Limit [VSTMAX]At least 0 |
WNI_44Real | Hz | 1.0 | Tuned Frequency of the Notch Filter [WNI]Range 0 to 0Used when (IncNF_44==1) |
Configuration
| Parameter | Unit | Default | Description |
|---|---|---|---|
DECChoice | · | NONE | Discontinuous Excitation Controller ?Written as NONE (None), DEC1A, DEC2A, DEC3A |
IEEE_StdChoice | · | 1992_ADDENDUM | Select the appropriate IEEE Std 421.5Written as 1992_ADDENDUM (1992 addendum), 2005Used when (PSS>2) |
INIT_DInteger | · | 1 | DEC Status: 0-Initialize;1-ReleaseRange -2147483648 to 2147483647 |
INIT_PInteger | · | 1 | PSS Status: 0-Initialize;1-ReleaseRange -2147483648 to 2147483647 |
NameText | · | · | Name for identificationEnter a name for identificationRange 0 to 0 |
PSSChoice | · | PSS1A | Stabilizer ?Written as NONE (None), PSS1A, PSS2B, PSS3B, PSS4B |
Dec1A: Discontinuous Excitation Controller Data: Section 1
| Parameter | Unit | Default | Description |
|---|---|---|---|
ESC_1Real | pu | 0.0015 | Speed Change Reference [Esc]At least 0 |
KETL_1Real | pu | 47.0 | Terminal Voltage Limiter gain [KETL]At least 0 |
TL1_1Real | s | 0.025 | Voltage Limiter Lead Time [TL1]At least 0 |
TL2_1Real | s | 1.25 | Voltage Limiter Lag Time [TL2]At least 0 |
TW5_1Real | s | 5.0 | DEC Washout Time Constant [Tw5]At least 0 |
VAL_1Real | pu | 5.5 | Regulator Voltage Reference [VAL]At least 0 |
VOMN_1Real | pu | 0.1 | Terminal Voltage Minimum Deviation Over ReferenceAt least 0 |
VOMX_1Real | pu | 0.3 | Terminal Voltage Maximum Deviation Over ReferenceAt least 0 |
VTC_1Real | pu | 0.95 | Terminal Voltage Level Reference [VTC]At least 0 |
VTLMTReal | pu | 1.1 | Terminal Voltage Reference [VTLMT]At least 0 |
Dec1A: Discontinuous Excitation Controller Data
| Parameter | Unit | Default | Description |
|---|---|---|---|
KAN_1Real | pu | 400.0 | Integrator Gain [KAN]At least 0 |
TAN_1Real | s | 0.08 | Integrator Time Constant [TAN]At least 0 |
TD_1Real | s | 0.03 | Reset Delay Time [TD]At least 0 |
VAMX_1Real | pu | 1.0 | Integrator Maximum Limit [VANMAX]Range 0 to 999 |
VSMN_1Real | pu | -0.066 | PSS plus DEC Minimum Limit [VSMIN]At most 0 |
VSMX_1Real | pu | 0.2 | PSS plus DEC Maximum Limit [VSMAX]At least 0 |
VTM_1Real | pu | 1.13 | Bang-Bang Controller Maximum Limit [VTM]At least 0 |
VTN_1Real | pu | 1.12 | Bang-Bang Controller Minimum Limit [VTN]At least 0 |
Pss4B [2005]: Power System Stabilizer Data: High Frequency Band
| Parameter | Unit | Default | Description |
|---|---|---|---|
KH11_44Real | pu | 1.0 | Proptional Gain in First Block [KH11] |
KH17_44Real | pu | 1.0 | Proptional Gain in First Block [KH17] |
KH1_44Real | pu | 66.0 | Gain in Positive Branch [KH1] |
KH2_44Real | pu | 66.0 | Gain in Negative Branch [KH2] |
KH_44Real | pu | 120.0 | Gain in Common Branch [KH] |
TH10_44Real | s | 0.0 | Lag Time Constant in Second Block [TH10]At least 0 |
TH11_44Real | s | 0.0 | Lead Time Constant in Third Block [TH11]At least 0 |
TH12_44Real | s | 0.0 | Lag Time Constant in Third Block [TH12]At least 0 |
TH1_44Real | s | 0.01513 | Derivative Time Constant in First Block [TH1]At least 0 |
TH2_44Real | s | 0.01816 | Lag Time Constant in First Block [TH2]At least 0 |
TH3_44Real | s | 0.0 | Lead Time Constant in Second Block [TH3]At least 0 |
TH4_44Real | s | 0.0 | Lag Time Constant in Second Block [TH4]At least 0 |
TH5_44Real | s | 0.0 | Lead Time Constant in Third Block [TH5]At least 0 |
TH6_44Real | s | 0.0 | Lag Time Constant in Third Block [TH6]At least 0 |
TH7_44Real | s | 0.01816 | Derivative Time Constant in First Block [TH7]At least 0 |
TH8_44Real | s | 0.02179 | Lag Time Constant in First Block [TH8]At least 0 |
TH9_44Real | s | 0.0 | Lead Time Constant in Second Block [TH9]At least 0 |
VHMN_44Real | pu | -0.6 | Minimum Limit [VHMIN]At most 0 |
VHMX_44Real | pu | 0.6 | Maximum Limit [VHMAX]At least 0 |
Pss4B [2005]: Power System Stabilizer Data: Intermediate Frequency Band
| Parameter | Unit | Default | Description |
|---|---|---|---|
KI11_44Real | pu | 1.0 | Proptional Gain in First Block [KI11] |
KI17_44Real | pu | 1.0 | Proptional Gain in First Block [KI17] |
KI1_44Real | pu | 66.0 | Gain in Positive Branch [KI1] |
KI2_44Real | pu | 66.0 | Gain in Negative Branch [KI2] |
KI_44Real | pu | 30.0 | Gain in Common Branch [KI] |
TI10_44Real | s | 0.0 | Lag Time Constant in Second Block [TI10]At least 0 |
TI11_44Real | s | 0.0 | Lead Time Constant in Third Block [TI11]At least 0 |
TI12_44Real | s | 0.0 | Lag Time Constant in Third Block [TI12]At least 0 |
TI1_44Real | s | 0.173 | Derivative Time Constant in First Block [TI1]At least 0 |
TI2_44Real | s | 0.2075 | Lag Time Constant in First Block [TI2]At least 0 |
TI3_44Real | s | 0.0 | Lead Time Constant in Second Block [TI3]At least 0 |
TI4_44Real | s | 0.0 | Lag Time Constant in Second Block [TI4]At least 0 |
TI5_44Real | s | 0.0 | Lead Time Constant in Third Block [TI5]At least 0 |
TI6_44Real | s | 0.0 | Lag Time Constant in Third Block [TI6]At least 0 |
TI7_44Real | s | 0.2075 | Derivative Time Constant in First Block [TI7]At least 0 |
TI8_44Real | s | 0.2491 | Lag Time Constant in First Block [TI8]At least 0 |
TI9_44Real | s | 0.0 | Lead Time Constant in Second Block [TI9]At least 0 |
VIMN_44Real | pu | -0.6 | Minimum Limit [VIMIN]At most 0 |
VIMX_44Real | pu | 0.6 | Maximum Limit [VIMAX]At least 0 |
Pss4B [2005]: Power System Stabilizer Data: Low Frequency Band
| Parameter | Unit | Default | Description |
|---|---|---|---|
KL11_44Real | pu | 1.0 | Proptional Gain in First Block [KL11] |
KL17_44Real | pu | 1.0 | Proptional Gain in First Block [KL17] |
KL1_44Real | pu | 66.0 | Gain in Positive Branch [KL1] |
KL2_44Real | pu | 66.0 | Gain in Negative Branch [KL2] |
KL_44Real | pu | 7.5 | Gain in Common Branch [KL] |
TL10_44Real | s | 0.0 | Lag Time Constant in Second Block [TL10]At least 0 |
TL11_44Real | s | 0.0 | Lead Time Constant in Third Block [TL11]At least 0 |
TL12_44Real | s | 0.0 | Lag Time Constant in Third Block [TL12]At least 0 |
TL1_44Real | s | 1.73 | Derivative Time Constant in First Block [TL1]At least 0 |
TL2_44Real | s | 2.075 | Lag Time Constant in First Block [TL2]At least 0 |
TL3_44Real | s | 0.0 | Lead Time Constant in Second Block [TL3]At least 0 |
TL4_44Real | s | 0.0 | Lag Time Constant in Second Block [TL4]At least 0 |
TL5_44Real | s | 0.0 | Lead Time Constant in Third Block [TL5]At least 0 |
TL6_44Real | s | 0.0 | Lag Time Constant in Third Block [TL6]At least 0 |
TL7_44Real | s | 2.075 | Derivative Time Constant in First Block [TL7]At least 0 |
TL8_44Real | s | 2.491 | Lag Time Constant in First Block [TL8]At least 0 |
TL9_44Real | s | 0.0 | Lead Time Constant in Second Block [TL9]At least 0 |
VLMN_44Real | pu | -0.075 | Minimum Limit [VLMIN]At most 0 |
VLMX_44Real | pu | 0.075 | Maximum Limit [VLMAX]At least 0 |
Pss2B: Pss Lead-Lag Data
| Parameter | Unit | Default | Description |
|---|---|---|---|
KS1_2Real | pu | 5.0 | PSS Gain [Ks1]At least 0 |
M_2Integer | · | 1 | Integer Filter Constant [M]Range 1 to 5 |
N_2Integer | · | 1 | Integer Filter Constant [N]Range 1 to 4 |
T10_2Real | s | 0.08 | 3rd Lead Time Constant [T10]At least 0 |
T1_2Real | s | 0.0 | 1st Lead Time Constant [T1]At least 0 |
T2_2Real | s | 6.0 | 1st Lag Time Constant [T2]At least 0 |
T3_2Real | s | 0.08 | 2nd Lead Time Constant [T3]At least 0 |
T4_2Real | s | 0.01 | 2nd Lag Time Constant [T4]At least 0 |
T5_2Real | s | 0.01 | 3rd Lag Time Constant [T11]At least 0 |
T8_2Real | s | 0.5 | Filter Lead Time constant [T8]At least 0 |
T9_2Real | s | 0.1 | Filter Lag Time constant [T9]At least 0 |
VSTN_2Real | pu | -0.1 | PSS Output Minimum Limit [VSTMIN]At most 0 |
VSTX_2Real | pu | 0.1 | PSS Output Maximum Limit [VSTMAX]At least 0 |
Pss3B: Power System Stabilizer Data
| Parameter | Unit | Default | Description |
|---|---|---|---|
KS1_3Real | pu | 1.0 | First Input Signal Gain [Ks1]At least 0 |
KS2_3Real | pu | 0.0 | Second Input Signal Gain [Ks2]At least 0 |
T1_3Real | s | 0.02 | First Transducer Time Constant [T1]At least 0 |
T2_3Real | s | 1.5 | First Signal Washout Time Constant [Tw1]At least 0 |
T3_3Real | s | 0.02 | Second Transducer Time Constant [T2]At least 0 |
T4_3Real | s | 1.5 | Second Signal Washout Time Constant [Tw2]At least 0 |
VS1_3Choice | · | NONE | First Input SignalWritten as NONE (None), FREQUENCY (Frequency), SPEED (Speed), POWER (Power) |
VS2_3Choice | · | NONE | Second Input SignalWritten as NONE (None), FREQUENCY (Frequency), SPEED (Speed), POWER (Power) |
Pss4B [1992]: Power System Stabilizer Data
| Parameter | Unit | Default | Description |
|---|---|---|---|
KS1_4Real | pu | 1.0 | First Signal gain [Ks1]At least 0 |
KS2_4Real | pu | 0.0 | Second Signal gain [Ks2]At least 0 |
M_4Real | s | 1.5 | Synchronous Machine Inertia Constant [2H]At least 0 |
T0_4Real | s | 0.2 | System Start-up Time Constant [T0]At least 0 |
T1_4Real | s | 0.02 | First Transducer Time Constant [T1]At least 0 |
T2_4Real | s | 1.5 | First Signal Washout Time Constant [T2]At least 0 |
T3_4Real | s | 0.03 | Second Transducer Time Constant [T3]At least 0 |
T4_4Real | s | 1.5 | Second Signal Washout Time Constant [T4]At least 0 |
VS1_4Choice | · | NONE | First Input SignalWritten as NONE (None), FREQUENCY (Frequency), SPEED (Speed), POWER (Power) |
VS2_4Choice | · | NONE | Second Input SignalWritten as NONE (None), FREQUENCY (Frequency), SPEED (Speed), POWER (Power) |
VSTN_4Real | pu | -0.1 | PSS Output Minimum Limit [VSTMIN]At most 0 |
VSTX_4Real | pu | 0.1 | PSS Output Maximum Limit [VSTMAX]At least 0 |
Pss2B: Pss Signal Data
| Parameter | Unit | Default | Description |
|---|---|---|---|
KS2_2Real | pu | 5.0 | 2nd Signal Gain [Ks2]At least 0 |
KS3_2Real | pu | 5.0 | 2nd Signal 2nd Gain [Ks3]At least 0 |
T6_2Real | s | 0.0 | 1st Signal Transducer Time Constant [T6]At least 0 |
T7_2Real | s | 0.0 | 2nd Signal Transducer Time Const. [T7]At least 0 |
TW1_2Real | s | 10.0 | 1st Signal 1st Washout Time [TW1]At least 0 |
TW2_2Real | s | 10.0 | 1st Signal 2nd Washout Time [TW2]At least 0 |
TW3_2Real | s | 10.0 | 2nd Signal 1st Washout Time [TW3]At least 0 |
TW4_2Real | s | 10.0 | 2nd Signal 2nd Washout Time [TW4]At least 0 |
VS1N_2Real | pu | -0.08 | First Signal Minimum Input [VSI1MIN]At most 0 |
VS1X_2Real | pu | 0.08 | First Signal Maximum Input [VSI1MAX]At least 0 |
VS1_2Choice | · | NONE | First Input SignalWritten as NONE (None), FREQUENCY (Frequency), SPEED (Speed), POWER (Power) |
VS2N_2Real | pu | -1.25 | Second Signal Minimum Input [VSI2MIN]At most 0 |
VS2X_2Real | pu | 1.25 | Second Signal Maximum Input [VSI2MAX]At least 0 |
VS2_2Choice | · | NONE | Second Input SignalWritten as NONE (None), FREQUENCY (Frequency), SPEED (Speed), POWER (Power) |
Dec2A: Discontinuous Excitation Controller Data
| Parameter | Unit | Default | Description |
|---|---|---|---|
TD1_2Real | s | 0.10 | Controller Time Constant [TD1]At least 0 |
TD2_2Real | s | 10.0 | DEC Washout Time Constant [TD2]At least 0 |
VDMN_2Real | pu | 1.1 | DEC Minimum limit |
VDMX_2Real | pu | 1.1 | DEC Maximum limitAt least 0 |
VK_2Real | pu | 0.08 | Trigger Signal Amplitude [Vk]At least 0 |
VTMX_2Real | pu | 1.1 | Terminal Voltage Maximum Limit [VTLIMIT]At least 0 |
Dec3A: Discontinuous Excitation Controller Data
| Parameter | Unit | Default | Description |
|---|---|---|---|
TDR_3Real | s | 1.0 | Reset Time Delay [TDR]At least 0 |
VTMN_3Real | pu | 0.95 | Controller Input Reference [VTMIN]At least 0 |
Related
- All 345 definitions in the component reference
- Control tuning: overshoot, rise time and damping
- PSCAD automation with Python: getting started
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