Line distance protection REL670 Fault locator LMBRFLO

1. Line distance protection REL670 Fault locator LMBRFLO

ABB Substation Automation Products
Line distance protection REL670
Fault locator
LMBRFLO
1MRG019236

2. Contents

Chapter 9
Contents
© ABB Group
August 4, 2021 | Slide 2
General
Measurement
Configuration
Settings

3. General Fault Locator LMBRFLO

© ABB Group
August 4, 2021 | Slide 3
Reliable information on the fault location greatly decreases the
outage of the protected lines and increases the total availability
of a power system
The fault locator algorithm is compensated for
Load current
Mutual coupling with parallel line
Chapter 9

4. Resistive fault – Double end infeed

Chapter 9
Resistive fault – Double end infeed
A
Import
Export
B
ZL
Um
Um
Z<
Z<
X
Compensated X value
X
ZL
Not compensated X value
ZL
Compensated X value
Not compensated X value
R
R
Resistive fault export
© ABB Group
August 4, 2021 | Slide 4
Resistive fault import

5. Measurement Fault locator LMBRFLO

Chapter 9
Measurement
Fault locator LMBRFLO
U A I A p Z L I F RF
IF
DA
I FA
DA
1 p Z L Z B
Z A ZL ZB
General fault equation for a single line :
U A I A p ZL
I FA
RF
DA
Where:
IFA =The change of current in station A
DA = The fault current distribution factor
(Ratio between the fault current IA in line end A and
the total fault current IF)
© ABB Group
August 4, 2021 | Slide 5

6. Measurement Fault locator LMBRFLO

Chapter 9
Measurement
Fault locator LMBRFLO
Expressions for UA, IA and IFA for
different fault types
U A I A p ZL
© ABB Group
August 4, 2021 | Slide 6
I FA
RF
DA

7. Configuration Fault locator LMBRFLO

Chapter 9
Configuration
Fault locator LMBRFLO
REL670 HS
Fault locator is started from
Phase selection is selected from Phase selector, PHS
© ABB Group
August 4, 2021 | Slide 7
Selective trip, AR01-START or Switch on to fault trip, SOTF-TRIP
Phase selective non directional start, PHS-STNDL1, PHS-STNDL2 and PHSSTNDL3

8. Configuration/Settings Fault locator LMBRFLO

Fault locator use information from
the disturbance recorder channels
Selection of channels are done in PST
ZeroAngleRef has to be set to one voltage
channel in PST, preferably UL1 (channel 5)
Disturbance recorder must be set on in PST
Analog channels 1-9 must be set on in PST
© ABB Group
August 4, 2021 | Slide 8
Chapter 9

9. Settings Fault locator LMBRFLO

Chapter 9
Settings
Fault locator LMBRFLO
Settings to define line and source
impedance values
A Source impedance behind REL670 in primary ohm
B Remote end source impedance in primary ohm
Line parameters, 100 % ZL in primary ohm
Mutual impedance, 100% ZL in primary ohm
Line length
© ABB Group
August 4, 2021 | Slide 9

10. Fault locator

11.

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