GE D60 - Page 383

GE Multilin D60 Line Distance Protection System 5-249
5 SETTINGS 5.6 GROUPED ELEMENTS
5
h) COMPENSATED OVERVOLTAGE (ANSI 59P, IEC PTOV)
PATH: SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  VOLTAGE ELEMENTS  COMPENSATED OVERVOLTAGE
The compensated overvoltage function is intended to provide protection against an overvoltage due to the opening of the
remote terminal of a transmission line – the so called the Ferranti effect. This could be achieved using a transfer-tripping
scheme. However, with high voltage, more corona may exist on the line and inhibit the proper reception of a carrier-trans-
fer-trip signal. Also, the presence of a line with an open terminal in weak systems can raise the voltage level of the local
bus. Detecting and tripping a line with an open terminal can prevent tripping at the local bus in this case.
Figure 5–126: TRANSMISSION LINE WITH REMOTE TERMINAL OPEN
 COMPENSATED
 OVERVOLTAGE
COMPENSATED OV
FUNCTION: Disabled
Range: Disabled, Enabled
MESSAGE
COMPENSATED OV
SOURCE: SRC 1
Range: SRC 1, SRC 2, SRC 3, SRC 4
MESSAGE
COMPENSATED OV Zc
MAG: 2.00 Ω
Range: 0.00 to 500.00 ohms in steps of 0.01
MESSAGE
COMPENSATED OV Zc
ANG: 90°
Range: 30 to 90° in steps of 1
MESSAGE
COMPENSATED OV
I_1max: 0.20 pu
Range: 0.01 to 1.00 pu in steps of 0.01
MESSAGE
COMPENSATED OV STG1
PICKUP: 1.300 pu
Range: 0.250 to 3.000 pu in steps of 0.01
MESSAGE
COMPENSATED OV STG1
DELAY: 1.00 s
Range: 0.00 to 600.00 seconds in steps of 0.01
MESSAGE
COMPENSATED OV STG2
PICKUP: 1.300 pu
Range: 0.250 to 3.000 pu in steps of 0.01
MESSAGE
COMPENSATED OV STG2
DELAY: 1.00 s
Range: 0.00 to 600.00 seconds in steps of 0.01
MESSAGE
COMPENSATED OV STG3
PICKUP: 1.300 pu
Range: 0.250 to 3.000 pu in steps of 0.01
MESSAGE
COMPENSATED OV STG3
DELAY: 1.00 s
Range: 0.00 to 600.00 seconds in steps of 0.01
MESSAGE
COMPENSATED OV BLK:
Off
Range: FlexLogic™ operand
MESSAGE
COMPENSATED OV
TARGET: Self-reset
Range: Self-reset, Latched, Disabled
MESSAGE
COMPENSATED OV
EVENTS: Disabled
Range: Disabled, Enabled
Z
c
Local
terminal
V_1
Remote
terminal
V_1
C
I_1
843810A1.CDR