ABB Relion 670 Series Applications Manual page 117

1MRK 511 407-UUS Rev. J
then it is necessary to set the load angle in FDPSPDIS (21) or FRPSPDIS (21) function to not less
than equation 34.
LdAngle
EQUATION1738-ANSI V1 EN-US
It is recommended to set the corresponding resistive reach parameters in reverse direction
RLdOutRv and kLdRRv ) to the same values as in forward direction, unless the system operating
(
conditions, which dictate motoring and generating types of oscillations, require different values.
This decision must be made on basis of possible system contingency studies especially in cases
when the direction of transmitted power may change fast in short periods of time. It is
recommended to use different setting groups for operating conditions, which are changing only
between different periods of year (summer, winter).
System studies should determine the settings for the hold timer
secure continuous output signal from the Power swing detection function (ZMBURPSB, 68) during
the power swing, even after the transient impedance leaves ZMBURPSB (68) operating
characteristic and is expected to return within a certain time due to continuous swinging.
Consider the minimum possible speed of power swinging in a particular system.
tR1 inhibit timer delays the influence of the detected residual current on the inhibit criteria for
The
ZMBURPSB(68). It prevents operation of the function for short transients in the residual current
measured by the IED.
tR2 inhibit timer disables the output PICKUP signal from ZMBURPSB (68) function, if the
The
measured impedance remains within ZMBURPSB (68) operating area for a time longer than the set
tR2 value. This time delay was usually set to approximately two seconds in older power-swing
devices.
The setting of the
breaker and the dead-time of a single-phase autoreclosing together with the breaker closing time.
7.2 Out-of-step protection OOSPPAM (78)
7.2.1 Identification
Function description
Out-of-step protection
7.2.2 Application
Under balanced and stable conditions, a generator operates with a constant rotor (power) angle,
delivering an active electrical power to the power system, which is equal to the mechanical input
power on the generator axis, minus the small losses in the generator. In the case of a three-phase
fault electrically close to the generator, no active power can be delivered. Almost all mechanical
Phasor measurement unit RES670
Application manual
é
tan(LdAngle
³
arctan
ê
PHS ë
kLdRFw
tGF timer must cover, with sufficient margin, the opening time of a circuit
© Copyright 2017 Hitachi Power Grids. All rights reserved
ù é
) tan(25 )
=
PSD arctan
ú ê
û ë
0.61
IEC 61850 IEC 60617
identification identification
OOSPPAM
<
°
ù
= °
37.5
ú
û
tH . The purpose of this timer is to
GUID-8321AC72-187C-4E43-A0FC-AAC7829397C3 v1
GUID-BF2F1533-BA39-48F0-A55C-0B13A393F780 v2
ANSI/IEEE C37.2
device number
78
GUID-11643CF1-4EF5-47F0-B0D4-6715ACEEC8EC v6
Section 7
Impedance protection
(Equation 34)
111