Out-Of-Step Oosppam; Verifying The Settings - ABB REG650 Commissioning Manual

1MRK 502 049-UEN A
6.4.4
6.4.4.1
Commissioning manual

Out-of-step OOSPPAM

Prepare the IED for verification of settings as outlined in
verify settings".
Values of the logical signals for OOSPPAM are available on the local HMI under
Main menu/Tests/Function status/Impedance/OOSPPAM(78)/OOSPPAM:1.
The Signal Monitoring in PCM600 shows the same signals that are available on the
local HMI.

Verifying the settings

The commissioning procedure requires only one calculation and it must be done when
all the settings have already been determined. Suppose that the voltages, the currents
and the impedances ForwardR, ForwardX, ReverseR and ReverseX are equal to those
in the example as described in the "Setting guidelines" section for the Out-of-step
protection function in the REG650 Application manual.
1. Calculate the magnitude of a fundamental frequency current I that results in the
measured reactance ForwardX, as shown in point A in
[ ]
I A = U / 3 / ForwardX
gen
[ ]
I A = 13 8 . kV / 3 0 565 / .
[ ]
14107
I A =
IECEQUATION2321 V1 EN
2. Three symmetrical fundamental frequency phase voltages must be fed to IED,
with magnitudes proportional to U
actual PT ratio in the IED. If three symmetrical fundamental frequency currents,
proportional to I = 14107 A, that is, taking into the account the CT ratio, are fed
to the IED, and they all lag their phase voltages by 90 electrical degrees,
OOSPPAM function must measure a reactance equal to ForwardX, that is, 59.33
percent of Zbase, corresponding to 0.565 Ohm. This reactance is constant and
stationary, as shown in point A in
be calculated to perform the injection by a test set.
Voltages (instantaneous values) of the fundamental frequency, that is, 50 Hz or
60 Hz, must be as follows. Example for fundamental frequency 50 Hz:
u = 2 ⋅ U ⋅ sin
L 1 phase
IECEQUATION2328 V1 EN
u = 2 ⋅ U ⋅ sin
2
L phase
IECEQUATION2329 V1 EN
u = 2 ⋅ U ⋅ sin
L 3 phase
IECEQUATION2330 V1 EN
Where U = U
phase gen
must be applied to this primary value of the phase voltage, so that the actual value
of the secondary input voltage applied to IED can be calculated.
Ohm
/ √(3), that is, taking into the account the
gen
Figure 13. The voltages and the currents must
( )
2 ⋅ ⋅ 50 0 . ⋅ t
π
( )
2 ⋅ ⋅ 50 0 . ⋅ − ⋅ t 2 / 3
π π
( )
2 50 0 ⋅ . ⋅ − ⋅ t 4 / 3
π π
/ √(3) = 13800 V / √(3) = 7967.4 Volts. The actual PT ratio
Section 6
Testing functionality
5.1 "Preparing the IED to
Figure 13.
(Equation 1)
(Equation 2)
(Equation 3)
(Equation 4)
55