P44x/EN AP/E33
Application Notes
Page 100/220
MiCOM P441/P442 & P444
3.1.5
Zone 1 Phase Reach Settings
Required Zone 1 reach is to be 80% of the line impedance between Green Valley and Blue
River substations.
Required Zone 1 reach
= 0.8 x 100 x 0.484 / 79.4
°
x 0.12
Z1
= 4.64 / 79.4
°
Ω
secondary.
Z2
= 100 x 0.484 / 79.4° + 50% x 60 x 0.484 / 79.4°
The Line Angle = 80
°
.
Therefore actual Zone 1 reach, Z1 = 4.64 / 80
°
Ω
secondary.
3.1.6
Zone 2 Phase Reach Settings
Required Zone 2 impedance =
(Green Valley-Blue River) line imp 50% (Blue River-Rocky Bay) line impedance
Z2
= (100+30) x 0.484 / 79.4
°
x 0.12
= 7.56 / 79.4
°
Ω
secondary.
The Line Angle = 80
°
.
Actual Zone 2 reach setting = 7.56 / 80
°
Ω
secondary
3.1.7
Zone 3 Phase Reach Settings
Required Zone 3 forward reach =
(Green Valley-Blue River + Blue River-Rocky Bay) x 1.2
= (100+60) x 1.2 x 0.484 / 79.4
°
x 0.12
Z3
= 11.15 / 79.4
°
ohms secondary
Actual Zone 3 forward reach setting = 11.16 / 80
°
ohms secondary
3.1.8
Zone 4 Reverse Settings with no Weak Infeed Logic Selected
Required Zone 4 reverse reach impedance = Typically 10% Zone 1 reach
= 0.1 x 4.64 / 79.4
°
Z4
= 0.464 / 79.4
°
Actual Zone 4 reverse reach setting = 0.46 / 80
°
ohms secondary
3.1.9
Zone 4 Reverse Settings with Weak Infeed Logic Selected
Where zone 4 is used to provide reverse directional decisions for Blocking or Permissive
Overreach schemes, zone 4 must reach further behind the relay than zone 2 for the remote
relay. This can be achieved by setting: Z4
≥
((Remote zone 2 reach) x 120%) minus the
protected line impedance:
Remote Zone 2 reach =
(Blue River-Green Valley) line imp 50% (Green Valley-Tiger Bay) line impedance
=
(100+40) x 0.484 / 79.4
°
x 0.12
=
8.13
/
79.4
°
Ω
secondary.
Z4
≥
((8.13
/
79.4
°
) x 120%) - (5.81 / 79.4
°
)
=
3.95
/
79.4
°
Minimum zone 4 reverse reach setting = 3.96 / 80
°
ohms secondary
Содержание MiCOM P441
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Страница 5: ...Pxxxx EN SS C11 SAFETY SECTION...
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Страница 427: ...Installation P44x EN IN E33 MiCOM P441 P442 P444 INSTALLATION...
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Страница 439: ...Commissioning P44x EN CM E33 MiCOM P441 P442 P444 COMMISSIONING...
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Страница 495: ...Commissioning Test Record Sheets P44x EN RS E33 MiCOM P441 P442 P444 COMMISSIONING TEST RECORD SHEETS...
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Страница 521: ...Courrier Data Base P44x EN GC E44 MiCOM P441 P442 P444 CONFIGURATION MAPPING...
Страница 610: ...Courier Data Base P44x EN GC E44 MiCOM P441 P442 P444 DEFAULT PROGRAMMABLE SCHEME LOGIC PSL...
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