Overview
The “Undervoltage controlled reactive power protection” function detects critical power-system situations, mainly in case of regenerative generation. It prevents a voltage collapse in power system by disconnecting the power-generation facility from the main power systems and ensures reconnection under stable power-system conditions.
For more detailed information on “Undervoltage controlled reactive power protection” 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 for Protection Stage
| Addr. | Parameter | C | Setting Options | Default Setting |
| Prot. stage 1 | ||||
| _:13921:1 | Prot. stage 1:Mode | off on test |
off | |
| _:13921:2 | Prot. stage 1:Operate & flt.rec. blocked | no yes |
no | |
| _:13921:10 | Prot. stage 1:Blk. by meas.-volt. failure | no yes |
yes | |
| _:13921:27 | Prot. stage 1:Blk. w. inrush curr. detect. | no yes |
no | |
| _:13921:101 | Prot. stage 1:Trip inter- face contains | no operate operate (generator) operate (grid) |
operate (grid) | |
| _:13921:102 | Prot. stage 1:Q sign | not reversed reversed |
not reversed | |
| _:13921:3 | Prot. stage 1:Q> threshold value | 1.00 % to 200.00 % | 5.00 % | |
| _:13921:103 | Prot. stage 1:V< threshold value | 3.000 V to 175.000 V | 85.000 V | |
| _:13921:105 | Prot. stage 1:I> release threshold | 1 A @ 100 Irated | 0.030 A to 10.000 A | 0.100 A |
| 5 A @ 100 Irated | 0.15 A to 50.00 A | 0.50 A | ||
| 1 A @ 50 Irated | 0.030 A to 10.000 A | 0.100 A | ||
| 5 A @ 50 Irated | 0.15 A to 50.00 A | 0.50 A | ||
| 1 A @ 1.6 Irated | 0.001 A to 1.600 A | 0.100 A | ||
| 5 A @ 1.6 Irated | 0.005 A to 8.000 A | 0.500 A | ||
| _:13921:108 | Prot. stage 1:Oper. delay generator CB | 0.00 s to 60.00 s | 0.50 s | |
| _:13921:6 | Prot. stage 1:Operate delay grid CB | 0.00 s to 60.00 s | 1.50 s | |
Setting parameters for Reclosure Stage
| Addr. | Parameter | C | Setting Options | Default Setting |
| Reclos. stage | ||||
| _:13951:1 | Reclos. stage:Mode | off on test |
off | |
| _:13951:101 | Reclos. stage:V> threshold value | 3.000 V to 340.000 V | 95.000 V | |
| _:13951:104 | Reclos. stage:f difference positive | 0.01 Hz to 5.00 Hz | 0.05 Hz | |
| _:13951:105 | Reclos. stage:f difference negative | -5.00 Hz to -0.01 Hz | -2.50 Hz | |
| _:13951:106 | Reclos. stage:I> release threshold | 1 A @ 100 Irated | 0.030 A to 10.000 A | 0.100 A |
| 5 A @ 100 Irated | 0.15 A to 50.00 A | 0.50 A | ||
| 1 A @ 50 Irated | 0.030 A to 10.000 A | 0.100 A | ||
| 5 A @ 50 Irated | 0.15 A to 50.00 A | 0.50 A | ||
| 1 A @ 1.6 Irated | 0.001 A to 1.600 A | 0.100 A | ||
| 5 A @ 1.6 Irated | 0.005 A to 8.000 A | 0.500 A | ||
| _:13951:108 | Reclos. stage:Time delay | 0.00 s to 3600.00 s | 0.00 s | |
| _:13951:102 | Reclos. stage:Configura- tion | Setting options depend on configuration | ||
Logic Diagrams & highlights
Logic Diagram of the Protection Stage of the Undervoltage-Controlled Reactive-Power Protection
Logic Diagram of Reclosure Stage in Undervoltage-Controlled Reactive-Power Protection
