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Functions
2.7 Synchrocheck
Parameter TSUP VOLTAGE (address 6111) can be set to configure a monitoring time which requires above
stated release conditions to be present for at least de-energized switching before connection is allowed. The
preset value of 0.1 s accounts for transient responses and can be applied without modification.
Release via synchrocheck can be limited to a configurable synchronous monitoring time SYN. DURATION
(address 6112). The configured conditions must be fulfilled within this time period. Otherwise release is not
granted and the synchronizing function is terminated. If this time is set to ∞, the conditions will be checked
until they are fulfilled.
For special applications (e.g. connecting a ground switch) parameter 6113 25 Synchron allows enabling/
disabling the connection release when the conditions for synchronism are satisfied.
Power System Data
The system related data for the synchronization function are set at addresses 6121 to 6125.
The parameter Balancing V1/V2 (address 6121) can be set to account for different VT ratios of the two
parts of the power system (see example in
If a transformer is located between the system parts to be synchronized, its vector group can be accounted for
by angle adjustment so that no external adjusting measures are required. Parameter ANGLE ADJUSTM.
(address 6122) is used to this end.
The phase angle from V
Example:
Busbar
Feeder
Transformer
The transformer vector group is defined from the high side to the low side. In the example, the reference
voltage transformers (V
to vector group), that is 150°:
Address 6122 ANGLE ADJUSTM. = 150°.
The reference voltage transformers supply 100 V secondary for primary operation at nominal value while the
feeder transformer supplies 110 V secondary. Therefore, this difference must be balanced:
Address 6121 Balancing V1/V2 = 100 V/110 V = 0.91.
[ss-spg-ueber-trafo-gemess-061115, 1, en_US]
Figure 2-25
86
to V
is evaluated positively.
1
2
400 kV primary; 100 V secondary
220 kV primary; 110 V secondary
400 kV/220 kV; vector group Dy(n)5
) are the ones of the transformer high side, i.e. the setting angle is 5 x 30° (according
1
Busbar voltage measured across the transformer
Figure
2-25).
SIPROTEC 4, 7RW80, Manual
C53000-G1140-C233-4, Edition 07.2018
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