Florida Outage Preliminary report 3

[oldfieldguy]

First I've seen of this document. I know we had a 'discussion" back when it happened.

old field guy

 

[Zogzog]

Man I am so glad that wasnt me, I bet they had that guy in a windowless room with bright lights in his eyes asking, no screaming, questions for days.

 

[davidbeach]

Thanks for the link.

 

[oldfieldguy]

Zog-

The report says a "relay field engineer". I've worked with people who quite easily could have precipitated similar events if left to their own devices, except my employer did not call them "engineers".

You're right. I'll wager that was one interesting set of conversations...

old field guy

 

[QBplanner]

Thanks If there are any recorded information would be better.

 

[isquaredr]

Has anyone seen or got pictures of the faulty cb or is just more space junk orbiting our planet ?

 

[EEJaime]

I wonder if there are protective relays on the system controlling the heaters at his new post in Antarctica.

 

[RRaghunath]

Thanks for the link, oldfieldguy.

 

[resqcapt19]

I have a couple of questions, but please keep the answers somewhat simple as I am an electrician, not an engineer. When a frequency disturbance like this occurs, how fast does it move along the transmission system? It appears that the magnitude of the disturbance is dampened as it moves away from the source. Is that correct? And one last question, with a frequency deviation, how large does it have to be before protective relaying starts to react?
Thanks.
Don

 

[itsmoked]

Electrical transients move on wire about 1/3c.

Keith Cress
kcress -

http://www.flaminsystems.com

 

[sberbece]

Can we get a copy of FRCC Handbook ?

Regards
Stefan

 

[Sideswiper]

resqcapt19:

Good questions, I would also like to know the answers.

I'm not sure what the report is trying to say on page 8 (of 9). Did some of the generators trip because of the rate of the frequency change (df/dt), instead of the amount of frequency change? And the frequency actually went up and caused some sort of "blowout"?

Whatever the case, after some generators went offline I guess we began to see a larger drop in frequency. It says "Underfrequency load shedding was limited to the first step of the nine potential steps (or set-points) associated with the FRCC Underfrequency Load Shedding Program." I don't know exactly what frequency they have designated as Step 1 of their program, but I would humbly guess 59.5 Hz.

 

[HiSet]

Does anyone know as to what level of financial penalty was imposed by the regulator for this incidence?

 

[AoCaTra]

I believe it depends on the region. If I remember correctly, when freq. drops below 59.5 Hz , 10% of load will be shed for step 1 in SERC region.