Parallel Control - Siemens 6MD85 Manual

Control Functions
6.9 Voltage Controller
Additional Pararmeters for Three-Winding Transformers and for Grid Coupling Transformers
Parameter: V< Threshold w1
•
Default setting (_:136) V< Threshold w1 = 90.000 V
Parameter: V< Threshold w2
•
Default setting (_:150) V< Threshold w2 = 90.000 V
You can find the parameter and information lists in chapter
6.9.4.7

Parallel control

Parameter: Parallel mode
•
Default setting (_:14011:161) Parallel mode = No mode
With the Parallel mode parameter, you can switch the voltage controller into one of the following modes:
No mode
Master
Follower
Circulat. react current
Parameter: Parallel-transfomer id
•
Default setting (_:14011:168) Parallel-transfomer id = 1
The Parallel-transfomer id parameter indicates the ID of the transformer.
With this parameter, you identify individual transformers in a parallel group. Transformers belonging to the
same parallel group must be uniquely identifiable based on the ID. The unique identification applies to all
transformers which communicate via GOOSE.
Parameter: Parallel mode changeable
•
Default setting (_:14011:164) Parallel mode changeable = by setting
With the Parallel mode changeable parameter, you can influence the parallel control by setting or
via the setting controllable.
Parameter: Force master changeable
•
Default setting (_:14011:165) Force master changeable = by setting
With the Force master changeable parameter, you can determine by setting or via the setting
controllable, which device is the Master in the parallel control. In a group of transformers working in
parallel, only one device can be the Master. The presence of a Master is monitored.
Parameter: Maximal tap difference
•
Default setting (_:14011:166) Maximal tap difference = 2
With the Maximal tap difference parameter, you set the maximum permissible difference of the tap-
changer positions between the transformers of a group.
Parameter: Reactive I control factor
•
Default setting (_:14011:169) Reactive I control factor = 1.00
The voltage deviation between the transformers is influenced with the parameter Reactive I control
factor. This means that a deviation from one stage exceeds the bandwidth of the voltage controller. This
allows the control deviation D
every parallel controller.
Parameter:VT supervision
•
Default setting (_:14011:146) VT supervision = on
With the VT supervision parameter, you switch the voltage supervision on or off.
Parameter: VT supervision threshold
•
Default setting (_:14011:147) VT supervision threshold = 10.0 %
With the VT supervision threshold parameter, you set the threshold value for the voltage supervision.
Parameter: VT supervision time delay
500
, initiated by the circulating reactive current, to be adjusted individually for
CRC
6.9.5 Settings.
SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017