IG-150-EN version 04; 03/10/16
108
Protection functions. Description and settings General instructions
ekor.rps
4.29.2. Programming settings and collecting results
The necessary parameters for the distance calculation
algorithm to work are the following (all the values are
referred to the primary):
Abbrev. Description Units
alo
Line length km
Z1
Real part of the line’s positive sequence Impedance per length unit W/km
Z2
Imaginary part of the line’s positive sequence impedance per length unit W/km
Z01
Real part of the line’s zero-sequence impedance per length unit W/km
Z02
Imaginary part of the line’s zero-sequence Impedance per length unit W/km
YL2
Imaginary part of the line’s positive sequence admittance per length unit 1/(W/Km) 10-9
YL02
Imaginary part of the line’s zero-sequence admittance per length unit 1/(W/Km) 10-9
ZA1
Real part of the system’s positive sequence reduced impedance on the relay’s side
W
ZA2
Imaginary part of the system’s positive sequence reduced impedance on the relay’s side
W
ZB1
Real part of the system’s positive sequence reduced impedance on the relay’s opposite side
W
ZB2
Imaginary part of the system’s positive sequence reduced impedance on the relay’s opposite side
W
ZAB1
Real part of the positive sequence impedance in parallel with the relay’s line
W
ZAB2
Imaginary part of the positive sequence impedance in parallel with the relay’s line
W
tpV
Voltage variation minimum threshold for the “phase voltage [V]” fault detection primary V
tp1
Voltage variation minimum threshold for the “phase voltage [V]” fault detection primary A
tpIO
NEUTRAL current minimum threshold for the “neutral current [A]” fault detection primary A
Neutral minimum current after closing [A] primary A
Current detection YES/NO
RTV
Medium voltage transformer ration of the transformer
RTI
Phase current metering transformer ratio of the transformer
RTIN
Neutral current metering transformer ratio of the transformer
TSAL
Analog output and control measurement activation time 0 - 3600 s
Table 4.40. necessary parameters
If “Current detection” is set to YES and the fault point is
detected during the 10 cycles after the closing of a switch,
the neutral current is checked to see if it is higher than the
setting “neutral minimum current after closing”. If it is, it
means that there is an Inrush and current pre-fault values
of zero are used, in order to avoid the inrush distortion in
those measurements.
These parameters of the protection are programmed using
the communication with the SIPCON protection console.
The screen corresponding to the line parameters is shown
in the following gure:
Figure 4.39. Locator’s settings screen
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