ABB Relion 670 series, Applications Manual

Page: 151 / 760

Section 7 Impedance protection
7.1 Distance measuring zone, quadrilateral characteristic
for series compensated lines ZMCPDIS, ZMCAPDIS,
ZDSRDIR
SEMOD168167-1 v3
7.1.1 Identification
SEMOD168165-2 v2
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Distance measuring zone,
quadrilateral characteristic for series
compensated lines (zone 1)
ZMCPDIS
S00346 V1 EN-US
21
Distance measuring zone,
quadrilateral characteristic for series
compensated lines (zone 2-5)
ZMCAPDIS
S00346 V1 EN-US
21
Directional impedance quadrilateral,
including series compensation
ZDSRDIR
Z<->
IEC09000167 V1 EN-US
21D
7.1.2 Application
SEMOD168236-1 v1
7.1.2.1 Introduction
SEMOD168232-4 v2
Sub transmission networks are being extended and often become more and more complex,
consisting of a high number of multi-circuit and/or multi terminal lines of very different
lengths. These changes in the network will normally impose more stringent demands on the
fault clearing equipment in order to maintain an unchanged or increased security level of the
power system.
The distance protection function is designed to meet basic requirements for application on
transmission and sub transmission lines (solid earthed systems) although it also can be used
on distribution levels.
7.1.2.2 System earthing
SEMOD168232-11 v2
The type of system earthing plays an important roll when designing the protection system. In
the following sections, some hints with respect to distance protection are highlighted.
Solid earthed networks
SEMOD168232-14 v2
In solid earthed systems the transformer neutrals are connected solidly to earth without any
impedance between the transformer neutral and earth.
1MRK 505 343-UEN B Section 7
Impedance protection
145
Application manual