What To Do If Generators In Parallel Aren’t Synced Properly?

Identifying the Root Cause

When generators aren’t synced properly, it’s crucial to identify the underlying cause. If the voltage mismatch is significant (more than 1%), it’s likely due to a faulty voltage regulator or a malfunctioning alternator. In this case, inspect the voltage regulator and alternator for any signs of wear or damage. If the frequency drift is excessive (more than 1 Hz), it may indicate a problem with the governor or a loose connection. In this case, check the governor settings and ensure all connections are secure.

Adjusting Governor Settings and Phase Angle

To adjust governor settings, refer to the manufacturer’s guidelines for the correct procedure. Typically, this involves reducing the governor’s speed adjustment or increasing the governor’s droop setting. For example, if the governor is set to 100% droop, try increasing it to 120% or 150% to reduce the frequency drift. To adjust the phase angle, use a phase angle meter to measure the difference between the two generators. If the phase angle difference is significant (more than 30 degrees), it may indicate a problem with the synchronizing kit or a loose connection.

Best Practices for Generator Synchronization

When synchronizing generators, it’s essential to follow best practices to ensure a smooth and stable operation. First, ensure both generators are running at the same speed and frequency. Next, engage the synchronizing kit and slowly bring the generators into parallel. Monitor the voltage, frequency, and phase angle during the synchronization process to ensure they remain within acceptable limits (typically ±1% voltage, ±1 Hz frequency, and ±30 degrees phase angle). If the generators remain unstable, try adjusting the governor settings or reconfiguring the parallel kit.