Overview
The “Differential protection for phase angle regulating transformers” function supplements the existing “Transformer differential protection” function (ANSI 87T). Phase-angle regulating transformers are used to control the reactive-power flow and active-power flow in high-voltage power systems.
For more detailed information on “Differential protection for phase angle regulating transformer” function, refer to SIPROTEC 5 devices, V8.30 & higher manuals.
To see other supported functions, click here.
Function Blocks
Instances of the Phase-Angle Regulating Transformer
Setting Parameters
Setting parameters for the Single-Core PST
| Addr. | Parameter | C | Setting Options | Default Setting |
| Tap changer | ||||
| _:91:138 | General:Basic position | -128 to 127 | 8 | |
| _:91:139 | General:Volt. diff. adja- cent taps | 0.000 kV to 800.000 kV | 0.000 kV | |
| _:91:44 | General:Tap changer | Setting options depend on configuration | ||
| _:91:45 | General:Tap changer | Setting options depend on configuration | ||
| Sing.-core PST | ||||
| _:101 | Sing.-core PST:Use AR switch | no Block function |
no | |
| _:102 | Sing.-core PST:Blocking time ARS | 0.00 s to 60.00 s | 12.00 s | |
Setting parameters for the Special Transformer
| Addr. | Parameter | C | Setting Options | Default Setting |
| _:91:104 | General:Winding config- uration | Y (Wye) D (Delta) Z (Zig-Zag) |
Y (Wye) | |
| _:91:163 | General:Vector group numeral | 0 1 2 3 4 5 6 7 8 9 10 11 user-defined |
0 | |
| _:91:162 | General:Phase shift | -180.000 ° to 180.000 ° | 0.000 ° |
Setting parameters for the Two-Core PST
| Addr. | Parameter | C | Setting Options | Default Setting |
| Side data | ||||
| _:91:104 | General:Winding config- uration | Y (Wye) D (Delta) Z (Zig-Zag) |
Y (Wye) | |
| _:91:163 | General:Vector group numeral | 0 1 2 3 4 5 6 7 8 9 10 11 user-defined |
0 | |
| _:91:162 | General:Phase shift | -180.000 ° to 180.000 ° | 0.000 ° | |
| Two-core PST | ||||
| _:91:167 | General:Two-core side type | Source side Load side Exciter primary side Exciter regulating side |
Source side | |
| _:101 | Two-core PST:Use AR switch | no Block function Block fct. & switch VG |
no | |
| _:102 | Two-core PST:Blocking time ARS | 0.00 s to 60.00 s | 12.00 s | |
| _:2311:188 | General:Diff function mode | 87T primary prot 87T secondary prot |
87T primary prot | |
| _:2311:189 | General:Series unit ratio | 0.001 to 100.000 | 1.000 | |
Logic Diagrams & highlights
Asymmetrical Single-Core Transformer Scheme, Single-Core PST
Instance of the Single-Core PST Function Block
Logic of the Single-Core PST Function Block
Basic Scheme of a Special Transformer
Instance of the Special Transformer Function Block
Logic of the Special Transformer Function Block
Symmetrical Two-Core Transformer Scheme, Two-Core PST
Instance of the Two-Core PST Function Block
Logic of the Two-Core PST Function Block
