Cogeneration and Fault Mitigation

[buddy91082]

Looking to limit the amount of fault current back to the grid from our cogeneration plant.

Woudl like to use inverters as the fault mitigation. Anyone know if there are inverters out there in the 13.2kv range and a rating of 2.5MW - 3MW?

Thanks.

b

 

[dpc]

Yep, but you would be looking at a major investment. Maybe greater than the cost of your 3 MW cogen.

Why do you think you need to do this?

David Castor

http://www.cvoes.com

 

[buddy91082]

Thanks dpc. It's a local utility requirement. Another acceptable way is to use power fuses or fact fuses.

 

[dpc]

I think someone may be misinterpreting something. Big difference between some fuses and a huge inverter system. Including a few orders of magnitude in cost.





David Castor

http://www.cvoes.com

 

[buddy91082]

Nope. No misinterpretation. Just exploring the few options we have.

 

[waross]

If the requirements are really stringent you may be able to get a current limiter based on soft start technology. Still a major cost but probably quite a bit less than an inverter.
How about air core reactors?

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[cuky2000]

Fast interrupting devices such as Is-Limiter (ABB), commutating current limiter (G&W) or similar devices may be an option.

If there is not large motors or not concern with large voltage dip in the system, a series current limiting reactor may be a good option to consider to limit the SC.

Depend on the characteristics and operation mode of the system, a MV VFD could be a cost effective option if additional saving can be justified operating motors at variable speed and HP under the rated max. nameplate for reasonable time.