ABB SYN 5201 Operating Instructions Manual page 43

Operating Instructions
11. Block SYNCHROTACT 5, set calculated value and set to Ready again
12. Bring voltage difference outside of the tolerance band
13. Start synchronizing process
14. Following the first voltage adjusting command, the voltage difference must lie
approximately in the middle of the tolerance band.
15. If the pulse was too long: increase the setting value, if the pulse was too short: lower
the setting value
16. Repeat points 11 to 15 until the adjusting pulse length is correct and the matcher is
functioning satisfactorily.
17. Activate the frequency matcher again: set df/dt to previous value and save
18. Set pulse interval ts U to previous value and save
Pulse interval ts U
This defines the time between two voltage adjusting pulses. The default setting can
normally be left as it is. If problems arise with the voltage matching, tests can be carried
with higher or lower values.
Minimum pulse time tp Umin
The minimum voltage adjusting pulse should be set as short as possible taking into
account the manufacturer's specifications for the final control element. Usual setting
value: tp Umin = 0.05 s.
Where the function INVERSE U is used, or for tap-changer matching, this parameter
corresponds to the pulse duration.
Switchover to variable intervals INVERSE U
If this parameter is set to ON, the following applies:

fixed pulse duration

variable interval dependent on ts U
Settings recommendation for tp Umin if INVERSE U = ON: as high as possible, but so
that the matcher does not overshoot (see section 2.2.2 Voltage matching with variable
intervals).
Switchover to TAP CHANGER
If the voltage matcher controls a tap changer, the parameter should be set to ON. The
matcher then issues fixed pulse durations (tp Umin) and fixed pulse intervals (ts U). The
settings are based on the tap changer manufacturer's specifications.
4.2.6 Parameter group Frequency Matcher
Test function for determining the frequency adjusting characteristic TEST f-Match
This test function determines the plant-dependent setting value of the parameter df/dt.
After the test function is started, SYNCHROTACT 5 issues different Higher and Lower
commands to the governor in order to test its sensitivity. The duration of the test function
is generally 1 to 2 minutes.
abb
ABB Switzerland Ltd
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SYN 5201/SYN 5202
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