ABB REL670 2.2 IEC, Applications Manual

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8.10 Phase selection, quadrilateral characteristic with
settable angle FRPSPDIS
GUID-29E9C424-5AF7-40EE-89D9-F6BB4F0A0836 v2
8.10.1 Identification
GUID-07DB9506-656C-4E5F-A043-3DAA624313C7 v2
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Phase selection, quadrilateral
characteristic with settable angle
FRPSPDIS
Z<phs
SYMBOL-DD V1 EN-US
21
8.10.2 Application
GUID-D07A7B62-FDB9-4728-859A-9CE7423BE128 v1
The operation of transmission networks today is in many cases close to the stability
limit. The ability to accurately and reliably classify the different types of fault, so
that single pole tripping and autoreclosing can be used plays an important role in
this matter. Phase selection, quadrilateral characteristic with settable angle
(FRPSPDIS) is designed to accurately select the proper fault loop in the distance
measuring function depending on the fault type.
The heavy load transfer that is common in many transmission networks may in
some cases be in opposite to the wanted fault resistance coverage. Therefore, the
function has a built in algorithm for load encroachment, which gives the possibility
to enlarge the resistive setting of both the Phase selection with load encroachment
and the measuring zones without interfering with the load.
A current-based phase selection is also included. The measuring elements
continuously measure three phase currents and the residual current and, compare
them with the set values.
The extensive output signals from FRPSPDIS give also important information
about faulty phase(s), which can be used for fault analysis.
Load encroachment
Each of the six measuring loops has its own load (encroachment) characteristic
based on the corresponding loop impedance. The load encroachment functionality
is always active, but can be switched off by selecting a high setting.
The outline of the characteristic is presented in figure 158 . As illustrated, the
resistive blinders are set individually in forward and reverse direction while the
angle of the sector is the same in all four quadrants.
1MRK 506 369-UEN B
Section 8
Impedance protection
Line distance protection REL670 2.2 IEC 313
Application manual