Section 6 Impedance Protection; Distance Protection Zmfpdis; Identification; Functionality - ABB REL650 Technical Manual

1MRK 506 382-UEN A
Section 6
6.1
6.1.1
6.1.2
Line distance protection REL650 2.2 IEC
Technical manual
Impedance protection

Distance protection ZMFPDIS

Identification

Function description
Distance protection zone

Functionality

The ZMFPDIS function is a six 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 in applications with
single-phase autoreclosing.
In each measurement zone, ZMFPDIS function is designed with the flexibility to
operate in either quadrilateral or mho characteristic mode for separate phase-to-
ground or phase-to-phase loops.
The zones can operate independently of each other. Zones 3 to 5 in directional
(forward or reverse) or non-directional mode. Zone1 and zone2 are designed to
measure in forward direction only, while one zone (ZRV) is designed to measure in
the reverse direction. This makes them suitable, together with a communication
scheme, for protection of power lines and cables in complex network
configurations, such as parallel lines, multi-terminal lines, and so on.
A built-in adaptive load compensation algorithm prevents overreaching of the
distance zones in the load exporting end during phase-to-earth faults on heavily
loaded power lines. It also reduces underreach in the importing end.
The ZMFPDIS function block itself incorporates a phase-selection element and a
directional element, contrary to previous designs in the 600-series, where these
elements were represented with separate function-blocks.
The operation of the phase-selection element is primarily based on current change
criteria (i.e. delta quantities), with significantly increased dependability. There is
also a phase selection criterion operating in parallel which bases its operation only
on voltage and current phasors.
Impedance protection
IEC 61850 IEC 60617
identification identification
ZMFPDIS
S00346 V1 EN-US
Section 6
GUID-CC4F7338-2281-411D-B55A-67BF03F31681 v4
GUID-8ACD3565-C607-4399-89D2-A05657840E6D v3
ANSI/IEEE C37.2
device number
21
GUID-2E34AB7F-886E-499F-8984-09041A89238D v8
87