Functionality Ov2Ptov - ABB RES670 Technical Manual

Section 9
Voltage protection
9.2.2
9.2.3
9.2.4
286

Functionality OV2PTOV

Overvoltages may occur in the power system during abnormal conditions such as
sudden power loss, tap changer regulating failures, and open line ends on long lines.
Two step overvoltage protection (OV2PTOV, 59) function can be used to detect open
line ends, normally then combined with a directional reactive over-power function to
supervise the system voltage. When triggered, the function will cause an alarm, switch
in reactors, or switch out capacitor banks.
OV2PTOV (59) has two voltage steps, each of them with inverse or definite time
delayed.
OV2PTOV (59) has a high reset ratio to allow settings close to system service voltage.
Function block
OV2PTOV (59)
V3P* TRIP
BLOCK TRST1
BLKTR1 TRST1_A
BLK1 TRST1_B
BLKTR2 TRST1_C
BLK2 TRST2
TRST2_A
TRST2_B
TRST2_C
PICKUP
PU_ST1
PU_ST1_A
PU_ST1_B
PU_ST1_C
PU_ST2
PU_ST2_A
PU_ST2_B
PU_ST2_C
ANSI06000277-2-en.vsd
ANSI06000277 V2 EN-US
Figure 96: OV2PTOV (59) function block
Signals
Table 155: OV2PTOV (59) Input signals
Name Type
V3P GROUP
SIGNAL
BLOCK BOOLEAN
BLKTR1 BOOLEAN
Table continues on next page
Default Description
- Group signal for three phase voltage input
0 Block of function
0 Block of trip signal, step 1
Phasor measurement unit RES670 2.2 ANSI
1MRK 511 408-UUS A
M13798-3 v15
M13803-3 v6
PID-3535-INPUTSIGNALS v7
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