Photovoltaic invertor connection to MV grid 2

[slavag]

Dear All.
We work now on some technical evaluation of Photovoltaic invertor connection to MV grid.
Power is about 1MW. Im "responsible" for the protection requerements.
Actually, from my point of view, its same as co-generation issue.
Im use standard protection 50/51/49/67N
And would like use additional function for decoupling/ island mode:
27/59/81U/81O and ROCOF( df/dt), maybe voltge jamp.
Im think also add 25 functionality.

Could you please attached links to standards or rules in your countries.

Thanks in advance.
Best Regards.
Slava

 

[rbulsara]

Most utilities in New England (Northeast USA) uses IEEE 1547 as a reference.

Rafiq Bulsara

http://www.srengineersct.com

 

[Marmite]

Slava, this document gives guidance on what we do in the UK. See appendix D. As you say, its treated exactly the same as any other distributed generation.

http://www.energynetworks.org/engineering/pdfs/DG/FES_00318_v040211.pdf

Basic requirements:-

Overcurrent and earth fault

over-voltage

under-voltage

over-frequency

under-frequency

loss of mains

Regards
Marmite

 

[slavag]

Rafiq, Marmite thanks a lot.
I will order IEEE 1547.
Marmite, as usually UK guidance is good and useful documents.
Best Regards.
Have a nice weekend.
Slava