Islanding detection scheme for Induction generator of wind turbine

[jhonsom]

Would a simple Rate of Change of frequency Relay enough for detecting islanding condition for wind turbine application which uses Induction generators. Can we detect power mismatch in this application?

 

[cranky108]

I would think so. After all most wind turbines that I know of can't ramp up generation to keep the frequency within a bandwith.

So if you can't keep the frequency in bandwith, what will happen?
Also voltage would be another way to detect islanding, although much slower than frequency.

 

[PovaSa]

Measuring the frequency change is not enough.
You can / must look also to the vector shift and voltage change.
It depends on the country (Energy board and regulations of that country) how a islanding situation has to be measured. Good example is the G59 regulations in the UK.
Look for measuring devices which can detect islanding situations the MFR relays of Woodward.

 

[slavag]

Hi.
Please see attached topic on the issue.

http://www.eng-tips.com/viewthread.cfm?qid=269940&page=1

Its about PV, but is suitable for wind application too.
Good Luck