9.6 Autosynchronizer for generator breaker ASGCSYN
(ANSI 25AUTOSYNCG)
9.6.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Autosynchronizer for generator
breaker
ASGCSYN AUTOSYNCG 25AUTOSYNCG
9.6.2 Function block
Figure 853: Function block
9.6.3 Functionality
The autosynchronizer for generator breaker function ASGCSYN checks the
conditions across the circuit breaker from generator and bus side and issues
the pulse commands to the automatic voltage regulator (AVR) and prime mover
governor to match the voltage and frequency conditions if required. Once the
synchronization check and close CB conditions are fulfilled, the function gives
permission to close the circuit breaker. ASGCSYN includes the functionality of
energizing check, synchronization check and voltage and frequency matching.
The energizing check function checks that bus side is dead to ensure that
breaker closing can be done safely. The synchronization check function checks that
the voltages and frequency on both sides of the circuit breaker are within the
predefined setting. It is used to perform a controlled reconnection of two systems.
Depending on the selected control mode, the synchronization process is fully
automatic or it requires operator action for breaker closing and voltage and
frequency matching. In all of the modes, the synchronization check prevents breaker
closing if the set limit values are not met.
The voltage and frequency matching function issues raise or lower pulse commands
to AVR and the governor to match the voltage and frequency, based on the
1MRS759142 F
Control functions
REX640
Technical Manual
1557
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