Overview
The “Overvoltage protection with positive sequence voltage and compounding” function detects stationary overvoltages at the opposite line end.
On long, unloaded or weakly loaded transmission lines stationary overvoltages are caused by the capacitance per unit length (Ferranti effect). The overvoltage is present at the opposite line end in this case, but it can only be eliminated by switching off the local line end.
For more detailed information on “Overvoltage protection with positive sequence voltage and compounding” function, refer to SIPROTEC 5 devices, V8.30 & higher manuals.
To see other supported functions, click here.
Structure/Embedding of the Function
Setting Parameters
Setting parameters of the function
| Addr. | Parameter | C | Setting Options | Default Setting |
| Stage 1 | ||||
| _:241:1 | Stage 1:Mode | off on test |
off | |
| _:241:2 | Stage 1:Operate & flt.rec. blocked | no yes |
no | |
| _:241:3 | Stage 1:Threshold | 0.300 V to 200.000 V | 65.000 V | |
| _:241:4 | Stage 1:Dropout ratio | 0.90 to 0.99 | 0.95 | |
| _:241:6 | Stage 1:Operate delay | 0.00 s to 60.00 s | 3.00 s | |
| Stage 2 | ||||
| _:242:1 | Stage 2:Mode | off on test |
off | |
| _:242:2 | Stage 2:Operate & flt.rec. blocked | no yes |
no | |
| _:242:3 | Stage 2:Threshold | 0.300 V to 200.000 V | 75.000 V | |
| _:242:4 | Stage 2:Dropout ratio | 0.90 to 0.99 | 0.95 | |
| _:242:6 | Stage 2:Operate delay | 0.00 s to 60.00 s | 0.50 s | |
Logic Diagrams & highlights
Logic Diagram of an “Overvoltage Protection with Positive-Sequence Voltage and Compounding” stage
Equivalent Circuit Diagram of the Line
