Table of Contents

Siemens / Undervoltage controlled reactive power protection (ANSI 27/Q) _ Setting & highlights _ SI5067

Table of Contents

Overview

The “Undervoltage controlled reactive power protection” function detects critical power-system situations, mainly in case of regenerative generation, 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

Structure/Embedding of the Undervoltage controlled reactive power protection 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 the Protection Stage of the Undervoltage Controlled Reactive Power Protection

Logic Diagram of Reclosure Stage in Undervoltage-Controlled Reactive-Power Protection

Logic Diagram of Reclosure Stage in Undervoltage-Controlled Reactive-Power Protection

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