As the title, I'm trying to get control of the generator voltage and drive it down to match my bus (Shore Power) voltage.

In the attached graphs the voltage measurement is the differential between Gen L1 & Bus (SP) L1.

I enabled the Static Synch (parameter list shows it OFF) and made adjustments to "f sync KP, TI & TD".
The adjustments I made were wide and far trying to prove I could get control of the voltage, but I never saw anything meaningful.
I never touched the regulator settings.
There is an EPN in the mix... but I never made adjustments to that either

I'm used to working with Woodward Controllers and I've attached a Woodward transfer for reference. On a Woodward it's a simple pot to make adjustments.


The setup:

2 x Northern Lights M1066A1-105 KW
Deif PPU-3
3Ph 230/400VAC 50Hz

1 x 125kVA Atlas Shore Power Converter
Deif PPU-3
3Ph 230/400VAC 50Hz



Stbd Gen PPU-3
Order: 101016970.10
EPN-110DN 100033530.20

Port Gen PPU-3
Order: 101016970.10
EPN-110DN 10003353.20

Shore Power PPU-3
Order: 101036773.10

 

@Ozzie,

I am not clear on the situation--other than for some reason it's not possible to lower the on-board generator terminal voltage to match shore voltage.

I am also unfamiliar with EPN; can you please explain the TLA (Three-Letter Acronym) and its function under normal operation (independent of shore power AND when attempting to match shore voltage).

I presume you are trying to shift from on-board AC power to shore power without a loss of power on the vessel.

Is this a correct understanding of the situation?

What is the shore voltage where you are attempting to get connected to shore power?

What is the on-board generator terminal/system voltage when you are attempting to get connected to shore power?

Is there some kind of highly inductive (or capacitive) load at the time you are attempting to get connected to shore power?

Is there some kind of automatic synchronizer device that should be matching voltage and frequency and then closing the generator breaker? Or is this process of synchronization (because that's what should be happening--trying to synchronize with the shore power system in order to shut down the on-board generators and use shore power when docked) a manual process?

OR, are you trying to start the on-board generators to synchronize to the shore power in order to separate the shore power and run on the on-board generators?

Has this process ever worked properly? If so, what is different now?

Again, there are some terms I'm not personally familiar with and I'm trying to make sense of them to try to understand what the problem may be and how to verify what the problem is and how to resolve it.

Sorry for all the questions but I'm just trying to get a better feel for the situation and the issue(s).