Siemens 6MD85, Manual

Page: 399 / 1256

•
Default setting
(_:117) Max. frequency diff. f2>f1
=
0.10 Hz
•
Default setting
(_:118) Max. frequency diff. f2<f1
=
0.10 Hz
The default settings are typical values you can use to synchronize generators. For example, if you only want to
connect to the network supersynchronously, set the parameter
(_:118) Max. frequency diff. f2<f1
= 0 Hz.
With the parameter
(_:113) CB make time
, you set the make time of the closing circuit (circuit-breaker
operating time + times of auxiliary relay, where applicable). You must measure this time during commis-
sioning.
Parameter: f-threshold ASYN<->SYN
•
Recommended setting value
(_:120) f-threshold ASYN<->SYN
=
0.01 Hz
With the parameter
f-threshold ASYN<->SYN
, you set the frequency difference for switching over
between synchronous and asynchronous operation. You can find this parameter in the Synchr. op.mode
block.
Siemens recommends keeping the default setting value of
0.01 Hz
.
This parameter is also taken into account when the kick pulse has been activated (see Figure 6-82 ).
Parameters for Balancing Commands used to Control the Voltage
The following parameters are used as balancing commands to control the voltage:
•
(_:131) Balancing voltage V2
•
(_:132) T V pulse min
•
(_:133) T V pulse max
•
(_:134) dV per second
•
(_:135) T pause V
•
(_:136) Smoothing
•
(_:137) (V/Vrated)/(f/frated)
Parameter: Balancing voltage V2
•
Default setting
(_:131) Balancing voltage V2
=
off
With the parameter
Balancing voltage V2
, you specify whether you wish to issue balancing commands
for the voltage V2 on the generator side or not. If you wish to issue balancing commands for the voltage, 2
alternatives are available for voltage control.
Parameter Value Description
off
If you select this setting value, no balancing commands are issued for the
voltage V2 on the generator side.
transformer tap
If you select this setting value, the balancing commands are issued to the
voltage controller. The balancing commands control the voltage via the tap
changer on the transformer with the pulse duration
T V pulse max
.
balancing pulses
If you select this setting value, balancing commands are issued for the
voltage V2 to the voltage controller of the generator.
Parameter: T V pulse min
•
Default setting
(_:132) T V pulse min
=
0.10 s
With the parameter
T V pulse min
, you set the minimum time of the control pulse. It corresponds to the
minimum time to which the voltage controller responds. Set the parameter
T V pulse min
to this limiting
value. The default setting is a practicable value.
Control Functions
6.4 Synchronization Function
SIPROTEC 5, High-Voltage Bay Controller, Manual 399
C53000-G5040-C015-9, Edition 11.2017