Z
ZTY
CSA
A bit more findings after yesterdays troubleshooting.
I suspect the phase angle is the issue. This may result from 2 reasons which can not be confirmed yet since plant is running. I will check and confirm during blackout day.
1. I will check PT secondary connection for both Generator and grid. Since I found generator PT is star-open delta connection and grid PT is 2 windings PT.
2. I will check again generator and grid PT secondary side to synchroniser voltage sensing input wiring connection.
Nick
A bit more findings after yesterdays troubleshooting.
I suspect the phase angle is the issue. This may result from 2 reasons which can not be confirmed yet since plant is running. I will check and confirm during blackout day.
1. I will check PT secondary connection for both Generator and grid. Since I found generator PT is star-open delta connection and grid PT is 2 windings PT.
2. I will check again generator and grid PT secondary side to synchroniser voltage sensing input wiring connection.
Nick