Voltage/Frequency Supply Conversion for Barge

I'd use Motor-generator - Wikipedia, the free encyclopedia

That's one hell of a MG set at 1600KVA

1600kVA is going to be one helluva whatever is used...

You got there first- I have been busy tonight but THAT is exactly where my mind went.

The only other "practical"- using the term loosely- would be a UPS system but I think the MG will be cheaper AND more reliable (unless you REALLY go for "broke" and use a parrallel-redundant version where it is STILL cheaper).

So what part of the systems are frequency sensitive and what would the costs be to refit those parts to dual frequency capability?

Or more importantly how can you run a barge that big hauling off shore cargo and not be able to afford the fuel to run the equipment? Something is not adding up here in my views.

Are you sure about the 1600kVA figure (1.6MVA, 500 houses worth)?

What is the capacity of the shore power transformer?

Getting your voltage down is a transformer application.....straight forward enough.

Frequency conversion at the capacity you have quoted is a bit of a tall ask. At 440V no less. That solution will not be off the shelf or in a brochure. I suppose you could have lots of smaller MGs or VFDs or Rectifier/invertors other (are there any?) cycloconvertors......

Echo what TonyS and JRaef said.

What is on this barge? What types of electrical loads? Are they frequency intolerant?

What's it worth?

You will only save if

the metered cost plus the capital depreciation/lease costs plus installation costs plus removal costs plus disposal costs

is less than

the cost of the diesel(delivered) plus generator maintenance plus generator depreciation costs

If your genset is up to the job I'd be using that. But then, I'm not there so I could be second guessing badly.

What power redundancy do you have?

Thanks for all your valued replies.

Wal I would like to give you the full picture. In fact there are 4 generators (1800 kVA each) feeding a 690V, 60 Hz switchboard which is further stepped down to 440V, 60 Hz and this barge will be stationed for around 2 years in one location

The generators are supposed to run intermittently only to supply the 690V loads i.e. the cranes. The external shore supply is only to the 440V distribution board which feeds all the barge utilities i.e. HVAC, lighting, UPS, RO plant etc.

Do you think using a step down trafo 6.6kV/440V, 50 Hz with a cycloconverter to 60 Hz @ 1600 kVA is practical. Is frequency conversion at such high rating feasible.

See #9.

If you run your cranes on genset only then that leaves only the barge utilities to run on shore power. Some of these loads couldn't care less what the line frequency is. Those that do could be powered through a VFD on an as needs basis.

How much time do you have to get this all working?

Just figured it out- It is the new WikiLeaks Data Center, complete with satellite uplinks, microwave transmitters.an one helluva security system.

1.6MVA?

Satellite up links on a barge?....what the heck, those tracking drive motors would be busy is all. Microwave links with tracking too....this is one hell of a pimped barge!

Must be something else.

Thycon in Oz make what you're after it seems. Static frequency convertor be the name of that beast.

The SFX1600 will do it. Specs on page 142.

That, and a 1.6 MVA transformer on the input side to go from 6.6kV to 415V, then another 1.6 MVA transformer on the output side to go from 415 up to 440V. Although I'm sure that for the right coin, they may be willing to make one for 440V output, so you would only need the one transformer on the input side to go 6.6kV to 440V. So by the time you are done with that static converter, the transformer and switchgear for it, plus air conditioning and safety, figure on an E-House about 40ft long, the size of a large shipping container. Doable, but not cheap and not small. I'd estimate just under $1million US.