Impedance Protection - ABB Relion REL650 Series Product Manual

Line distance protection REL650
Version 2.2
Table 5. Basic IED functions, continued
IEC 61850 or function Description
name
ALTIM Time management
CAMCONFIG Central account management configuration
CAMSTATUS Central account management status
TOOLINF Tools information
COMSTATUS Protocol diagnostic
Table 6. Local HMI functions
IEC 61850 or function Description
name
LHMICTRL Local HMI signals
LANGUAGE Local human machine language
SCREEN Local HMI Local human machine screen behavior
FNKEYTY1–FNKEYTY5 Parameter setting function for HMI in PCM600
FNKEYMD1–
FNKEYMD5
LEDGEN General LED indication part for LHMI
OPENCLOSE_LED LHMI LEDs for open and close keys
GRP1_LED1– Basic part for CP HW LED indication module
GRP1_LED15
GRP2_LED1–
GRP2_LED15
GRP3_LED1–
GRP3_LED15

4. Impedance protection

Distance protection, quadrilateral and mho ZMFPDIS
The distance protection (ZMFPDIS) provides an operate
time that is slightly over one cycle, down towards sub-cycle.
Its seven zone full scheme protection with three fault loops
for phase-to-phase faults and three fault loops for phase-to-
earth faults for each of the independent zones, which makes
the function suitable for applications with single-phase
autoreclosing.
.
Each measurement zone is designed with the flexibility to
operate in either quadrilateral or mho characteristic mode.
This can be decided separately for the phase-to-earth or
phase-to-phase loops. Out of the seven zones, one zone
has fixed directionality to reverse, one zone has fixed
directionality to forward, and five zone with directionality
independently settable to forward/reverse/non-directional.
The operation of the phase-selection is primarily based on a
current change criteria (i.e. delta quantities), however there
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is also a phase selection criterion operating in parallel
which bases its operation on voltage and current phasors
exclusively. Additionally, the directional element provides a
fast and correct directional decision under difficult operating
conditions, including close-in three-phase faults,
simultaneous faults and faults with only zero-sequence in-
feed.
During phase-to-earth faults on heavily loaded power lines
there is an adaptive load compensation algorithm that
prevents overreaching of the distance zones in the load
exporting end, improving the selectivity of the function. This
also reduces underreach in the importing end.
The ZMFPDIS function is also equipped with the parallel
line mutual coupling compensation feature based on the
parallel line residual current.
Power swing detection ZMRPSB
Power swings may occur after disconnection of heavy loads
or trip of big generation plants.
Power swing detection function (ZMRPSB ) is used to
detect power swings and initiate block of all distance
protection zones. Occurrence of earth-fault currents during
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