Protective Elements
The transformer ratio can be modified by a tap changer.
Tap Changer:
The tap changer changes the transformer voltage ratio
k
Tap
.
k
Tap
=
V
LL,W1
(
1
+
Tap Changer
)
V
LL,W2
Principally, the following calculations need to be executed before calculating differential values and restraining
values of the transformer differential protection:
•
Rotating the measured values of winding 2 to the reference winding 1 count-clockwise
with an angle of rotation number (0, 1, …..11) * 30 degrees;
•
Adjustment of measured values for winding 2 with respect to CT ratio mismatch;
•
Adjustment of measured values for winding 2 with respect to winding connection (y, d, z); and
•
Adjustment of measured values for winding 1 and winding 2 according to neutral connection and ground
treatment (zero sequence current elimination).
629
MCDLV4
DOK-HB-MCDLV4-2E
Содержание HighPROtec MCDLV4
Страница 1: ...Manual Line Differential Protection MCDLV4 Software Version 3 4 a DOK HB MCDLV4 2E Revision A English...
Страница 3: ...Order Code Order Code 3 MCDLV4 DOK HB MCDLV4 2E...
Страница 47: ...Installation and Connection 47 MCDLV4 DOK HB MCDLV4 2E...
Страница 164: ...Input Output and LED Settings 164 MCDLV4 DOK HB MCDLV4 2E...
Страница 433: ...Parameters 433 MCDLV4 DOK HB MCDLV4 2E...
Страница 457: ...Device Parameters 457 MCDLV4 DOK HB MCDLV4 2E...
Страница 473: ...Blockings 473 MCDLV4 DOK HB MCDLV4 2E...
Страница 822: ...Protective Elements Name Description Profibus Scada Cmd 16 Scada Command 822 MCDLV4 DOK HB MCDLV4 2E...
Страница 988: ...Protective Elements 988 MCDLV4 DOK HB MCDLV4 2E P P Q P Q P Q Q Q P S S...
Страница 989: ...Protective Elements 989 MCDLV4 DOK HB MCDLV4 2E Pr Q P Q P Qr...
Страница 1023: ...Protective Elements 1023 MCDLV4 DOK HB MCDLV4 2E...
Страница 1070: ...Supervision 1070 MCDLV4 DOK HB MCDLV4 2E...