Flicker Compensators

Dear all,
on factories where many single-phase intermittent welders are active 24 hours/24, to reduce flicker reflected to the main supply, do you have some recommended product to suggest ? Power supply of such factories is between 2 to 30 MVA.
Welding are short, 2 to 20 cycles , after that there are 40 to 100 cycles without welding.
I know some solutions, from Canada, from Israel and from Switzerland: Automatic Voltage Compensators, Dynamic Voltage Restorers, DSTATCOMs.

Static and rotating UPSs are too expensive for such sizes, we cannot consider them.

Do you have some specific experience in similar applications?
Thank you in advance.
Regards

Mario

Ac Synchron Machines As Alternators

Dear all,
I'm looking to find a manufacturer of 2-poles 3-phase alternators, in the range 1 MW to 7.5 MW, low voltage or medium voltage, frequency 50 and 60 Hz, therefore speed should be 3000 or 3600 rpm.

I know manufacturers that can realize such machines, but I would find - if possible - a manufacturer that has already manufactured such machines, with experience and references.

Such machines shall be purchased regularly, some pieces every year for each frame.
These generators will be used for renewable energy cogenerators, where 4-poles construction cannot be used.

Can someone help me?
Thank you in advance
Mario

Empty section

I would suggest to add - as first message, deleting this one - some basic rules how to write in this section.

For example, it is possible to nominate companies without an official agreement?
Is it possible to copy info from other sites? (Copyright!)
How long must be such info?

Regards
Mario

Refurbished products

Dear all,
this company in Italy sells refurbished MV and LV power transformers, switches, cabinets, coming mainly from companies that stops production activities here.

SIMIR

Sometimes there are very good occasions to save money.
Regards
Mario

VA TECH ELIN EBG Elektronik to be sold?

Schneider Electric announced that they will buy, subject to regulatory approvals, the inverter manufacturer VA TECH ELIN EBG Elektronik in Vienna, Austria.
Actually medium and big inverters manufactured by VA TECH E.E.E. are sold with pDRIVE brandname.

Regards
Mario