psb

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POWER SWING BLOCKING (PSB OR OOS) FEATURE:

Settings of Power Swing Blocking (OOS):

EOOS = Y

OOSB1 = N

OOSB2 = Y

OOSB3 = Y

OOSB4 = Y

OSBD = 1.50

EOOST = N

OSTD = 1.00

X1T5 = 42.00

X1B5 = -38.00

R1R5 = 23.00

R1L5 = -16.00

X1T6 = 63.00

X1B6 = -58.00

R1R6 = 35.00

R1L6 = -58.00

50ABC = 0.20

UBD = 0.50

OUT7 = OSB

For simulating OOS condition in SEL 321, following conditions should be fulfilled

i) Breaker should be close condition (3 pole open condition should not be there),

ii) Loss of potential condition should not be there, iii) Fault current selected should be greater than the 50ABC setting adopted in

the OOS settings,

iv) Impedance loci chosen for the simulation should lie in between the zone 5 & 6 or OOS zone more than the OSBD time chosen in the relay.

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OOS

Step 1 Click OMICRON Test Universe

1.51 Icon in desktop OMICRON start page window opens.

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Step 2 Click Distance in OMICRON start page.

OMICRON Distance {Test View: Distance1 window opens.

Step 3 OMICRON Distance window select Parameters > Test Object

Parameters For Protection Device menu window opens.

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Step 4 In Parameters For Protection Device menu window enter the parameters in Device Settings, System Settings.

This will configure the settings

essential for testing.

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Procedure For Creating MHO Characteristics Zones:

Step 5 In Parameters For Protection Device > Zone Setting menu

Click New button New Zone will be added

Click Edit button Characteristic Editor window opens.

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In Characteristic Editor > Predefined Shapes menu click Circle button

It will add mho characteristics

Enter impedance reach value, offset

and line angle values in the Element list window then press OK button

The same procedure can be

followed for including any

number of Mho characteristics

for testing.

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Procedure For Creating Power swing Characteristics:

Step 6 In Parameters For Protection Device > Zone Setting menu

Click New button New Zone will be added

Click Edit button Characteristic Editor window opens.

In Characteristic Editor > Predefined Shapes menu click rectangular button

It will add quadrilateral

characteristics

Enter impedance reach value, offset

and line angle values in the Element list window then press OK button

The same procedure can be

followed for including any

number of Mho characteristics

for testing.

In element list 1:

i) Choose Line cartesian ii) Enter R=0; X=-38; Angle =0

This will create the Power swing

blocking inner zone. For creating

PSB outer zone the same

procedure with following setting

Element 1

R=0; X=-58; Angle=0

Element 2

R=35; X=0; Angle=85

Element 3

R=0; X=63; Angle=0

Element 4

R=-58; X=0; Angle=85

In element list 2:

i) Choose Line cartesian ii) Enter R=28; X=0; Angle =85

In element list 3:

i) Choose Line cartesian ii) Enter R=0; X=42; Angle =0

In element list 4:

i) Choose Line cartesian ii) Enter R=-35; X=0;

Angle=85

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Step 7 In Parameters For Protection Device menu window enter the parameters in Test Settings,

This will configure the settings

essential for testing.

Step 8 In OMICRON Distance {Test View: Distance1 window select Parameters > Hardware Configuration

Hardware Configuration menu window opens.

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Step 9 In Hardware Configuration menu Click General > Test Set(s) > Details.

Output Configuration Details menu window opens.

Step 10 Select 3 Voltage and 3 current

sources & Click OK. Output Configuration Details menu window closes.

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Step 11 In Hardware Configuration menu Click Analog Outputs select the voltage and current sources.

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Step 12 In Hardware Configuration menu Click Binary / Analog Inputs and in Binary Outputs select none of the inputs / outputs.

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Step 13 In OMICRON Distance {Test View: Distance1 window select View > Test.

Test View Menu opens.

Step 14 In OMICRON Distance {Test View: Distance1 window Fault type menu select R-Y-B fault.

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Step 15 In OMICRON Distance {Test View: Distance1 window Shot menu enter the Test point impedances

at line angle to be tested and click

Add button for testing these test point.

Enter the test point in between

Zone 5 & 6 of PSB and the fault

time should be more than the

OSBD time delay, which is set

in the SEL 321 PSB settings.

This will ensure the PSB

operation.

Step 16 In OMICRON Distance {Test View: Distance1 window Settings menu enter the parameters for testing.

Maximum fault duration in

Setting should be greater than OSBD delay. And fault current

selected should be greater than

the 50ABC pickup level.

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Step 17 In OMICRON Distance {Test View: Distance1 window click and select Test >Single Test.

The impedance test point will be

applied to the relay.

psb

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