Rockwell Automation 1407-CGCM Combination Generator Control Module User Manual
Page 61
Rockwell Automation Publication 1407-UM001G-EN-P - April 2013
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CGCM Unit Operation Chapter 3
To enable single-phase synchronizing, select the Generator VT
Configuration as Single-phase.
Configurable Synchronization Parameters
The CGCM unit provides a number of configurable settings to facilitate
synchronizing between systems with different voltages and metering
configurations.
Please refer to
for more information.
Initiating Synchronization
Prior to performing synchronization, the host controller must initialize tags in
the Output table to their appropriate values as described below.
• Automatic Synchronization
The host controller sets the AutoSyncEn tag to enable the synchronizer to
compute error and correction tags in the software interface for control of
the synchronization bus voltage, frequency, and phase. When the
synchronizing conditions are met, the CGCM unit sets the proper close
breaker tag.
–
Dual bus: The CGCM unit performs synchronization by using the
generator bus inputs and the active bus inputs.
–
Dead bus: If dead bus closure is enabled, the CGCM unit sets the close
breaker tag when the generator frequency and voltage are within the
configured dead bus limits.
When the CGCM unit senses that all three (one for single phase setup)
bus voltages are less than 10% of the configured voltage and frequency
is less than 20 Hz, it sets the Dead Bus Synchronizing mode tag. The
CGCM unit does not calculate voltage or frequency error signals
during Dead Bus mode.
–
Phase rotation (3-phase connection only): If the bus and generator are
opposite in phase rotation, synchronization fails. The CGCM unit
continually checks phase rotation match when synchronization is
active.
• Permissive Synchronization
The host controller sets the PermissiveSyncEn tag to enable Permissive
Synchronization mode. This mode is the same as Automatic Synchronizing
mode except that the CGCM unit does not compute error and correction
tags. The CGCM unit sets the proper close breaker tag when the
synchronizing conditions are met.
IMPORTANT
Prior to Host FRN 4.9, regardless of the setting of the
DeadbusGenFreqLoLimit
parameter, the CGCM unit disables
synchronization when the generator frequency is below 45 Hz.