Setting procedure on the IED
The parameters for the frequency time accumulation protection FTAQFVR are set
using the local HMI or through the dedicated software tool in Protection and
Control Manager (PCM600).
Common base IED values for primary current
IBase
and primary voltage
UBase
are set in the global base values for settings function GBASVAL. The
GlobalBaseSel
is used to select GBASVAL for the reference of base values.
FTAQFVR used to protect a turbine:
Frequency during start-up and shutdown is normally not calculated, consequently
the protection function is blocked by CB position, parameter
CBCheck
enabled. If
the generator supply any load when CB is in open position e.g. excitation
equipment and auxiliary services this may be considered as normal condition and
CBCheck
is ignored when the load current is higher then the set value of
CurrStartLevel
. Set the current level just above minimum load.
EnaVoltCheck
set to
Disable
.
tCont
: to be coordinated to the grid requirements.
tAccLimit
,
FreqHighLimit
and
FreqLowLimit
setting is derived from the turbine
manufacturer's operating requirements, note that
FreqLowLimit
setting must always
be lower than the set value of
FreqHighLimit
.
FTAQFVR used to protect a generator:
Frequency during start-up and shutdown is normally not calculated, consequently
the protection function is blocked by CB position, parameter
CBCheck
enabled.
CurrStartLevel
set to
Disable
.
EnaVoltCheck
set to
Enable
, voltage and frequency limits set according to the
generators manufacturer's operating requirements. Voltage and frequency settings
should also be coordinated with the starting values for over and underexcitation
protection.
tCont
: to be coordinated to the grid requirements.
tAccLimit
,
FreqHighLimit
and
FreqLowLimit
setting is derived from the generator
manufacturer's operating requirements.
Section 10
1MRK 511 407-UEN C
Frequency protection
188
Phasor measurement unit RES670 2.2 IEC
Application manual
Summary of Contents for Relion RES670
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