Dampocalypse - Oroville Dam Educational and Breaking News Thread of 2017. No fresh pix from op :-( - Page 82

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[ARCHIVED THREAD] - Dampocalypse - Oroville Dam Educational and Breaking News Thread of 2017. No fresh pix from op :-( (Page 82 of 298)

Posted: 2/12/2017 3:45:01 PM EST

[#1]

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Quoted:
Is OP in a bad reception spot?

Also where is Simjedi's live stream for today (I must see the chunk fall in

)

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The YouTube one.

ProFryan Live Feed

Periscope -       https://www.periscope.tv/w/1mrGmeVBkqdGy
YouTube -         https://youtu.be/olWJrre59HQ
Media Player -    http://periscope-prod-us-west-1.global.ssl.fastly.net/vidmanlive/nRJ8NvUia4sak7ZrUuAwQ14ZT2tRdtIcnsqjfxLAAiHXw6CKMVR0ocUqJX47l0vPM7tyTBPNVpQ-rDsarxpctg/playlist.m3u8

Posted: 2/12/2017 3:47:04 PM EST

[#2]

Weather forecast Chart for Sacremento....Oroville

Posted: 2/12/2017 3:48:22 PM EST

[#3]

Quote History

Quoted:
This is not true. The turbines have governors that will close the wicket gates and apply the brakes to prevent an over speed of the turbine. Most hydro stations will fan the generators if they have been sitting un used for a long period of time. This fanning is done typically with no electrical field on the generator and then done for a bit longer with a very low electrical field.

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So its like having it on turning gear so you dont start warping shit.

Posted: 2/12/2017 3:48:24 PM EST

[#4]

Quote History

Quoted:
Typically with black start hydro plants they can use station batteries/inverter to flash the field of the generator to get the generator starting producing a given terminal voltage before the regular exciter is able to take over and control terminal voltage and reactive power. This particular plant apparently has no black start capability according to the press conference guy. Most hydro plants will also have a small house generator that can charge station batteries and keep min flow requirements met but these typically are not PMG type generators either and require field flashing/external exciter that is fed from the station batteries/inverter as well as the grid back feed into the plant. This info is based on my limited experience and is in no way shape or form to be construed as anything other than internet ramblings by the village idiot.

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The only one I'm familiar with is in Maine, and they have a penstock about 1/5 the diameter of the others which they can use to excite the main generators

Posted: 2/12/2017 3:50:33 PM EST

[#5]

I bet there are 50 people up there trying to push video to the same tower. The network is maxed out.

Posted: 2/12/2017 3:51:21 PM EST

[#6]

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I think some people do not realise that the generator is permanently mounted to the same driveshaft that the water turbine is permanently mounted to. It's a one piece system that cannot be decoupled. There is no way to adjust the speed of the shaft by braking. There is no way to have the shaft locked to zero rotation while allowing water to flow through it.

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Right. There are no "brakes" to absorb 800MW worth of water flow through the turbines other than the electrical load.

If the water level at the turbine exit of the power house is too high they won't flow through the turbines. It would only worsen the water level problems at the exit.

Posted: 2/12/2017 3:52:25 PM EST

[#7]

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Quoted:
I bet there are 50 people up there trying to push video to the same tower. The network is maxed out.

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Yep, call this one a wrap IMO.

Posted: 2/12/2017 3:53:46 PM EST

[#8]

Pretty sketchy periscope feed, but when it's up you can see where a lot of land has been eaten up overnight.

Posted: 2/12/2017 3:54:04 PM EST

[#9]

Thanks Simjedi

this site is the best!

Posted: 2/12/2017 3:54:35 PM EST

[#10]

Posted: 2/12/2017 3:55:11 PM EST

[#11]

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Quoted:
Thanks Simjedi

this site is the best!

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You're welcome.

Needs moar drone buzzing.

Posted: 2/12/2017 3:55:52 PM EST

[#12]

Quote History

Quoted:
This is not true. The turbines have governors that will close the wicket gates and apply the brakes to prevent an over speed of the turbine. Most hydro stations will fan the generators if they have been sitting un used for a long period of time due to moisture build up in the rotor and stator. This fanning is done typically with no electrical field on the generator and then done for a bit longer with a very low electrical field.

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Yeah, but they aren't controlling 10,000+ CFS worth of water flow with the wickets and brakes.

Posted: 2/12/2017 3:55:55 PM EST

[#13]

Quote History

Quoted:
https://pbs.twimg.com/media/C4fiNuXVMAAFj1F.jpg

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holy cow

Posted: 2/12/2017 3:56:19 PM EST

[#14]

Quote History

Quoted:
Yep, call this one a wrap IMO.

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49 people must be sacrificed to the tributary so that we may view.

Posted: 2/12/2017 3:56:31 PM EST

[#15]

Stream working?

Posted: 2/12/2017 3:57:27 PM EST

[#16]

OP feed is down.

Posted: 2/12/2017 3:58:45 PM EST

[#17]

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Quoted:
Stream working?

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down for me

Posted: 2/12/2017 3:58:52 PM EST

[#18]

Back to it!

Posted: 2/12/2017 4:00:25 PM EST

[#19]

still down

Posted: 2/12/2017 4:02:11 PM EST

[#20]

Quote History

Quoted:
still down

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https://www.periscope.tv/w/1ypKdXzRRPnKW

Posted: 2/12/2017 4:03:28 PM EST

[#21]

TY

Posted: 2/12/2017 4:03:36 PM EST

[#22]

Quote History

Quoted:

So its like having it on turning gear so you dont start warping shit.

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Well not exactly. Steam turbines are put on turning gear to keep the turbine from drooping and are taken off once down to a temp. that they become stable at and are not so prone to drooping. Turning gear really has nothing to do with the generator it is all for the turbine shaft. The fanning is where they run the unit at rated speed (typically 100 rpm on the units I have dealt with) and allow air to pass through the generator section of the turbine to dry out any moisture that may have built up in the rotor or stator to keep from shorting out the rotor or stator.

Posted: 2/12/2017 4:03:41 PM EST

[#23]

Quote History

Quoted:
OP feed is down.

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Yes it is saying feed ended 3 minutes ago. I took that time to rewind the feed to see the massive chunk of dirt being calved. It was pretty impressive it is at 18:20. He reminded me of Cooter on the Dukes of Hazard he kept saying oh my god.

Posted: 2/12/2017 4:04:09 PM EST

[#24]

Updated Links

ProFryan Live Feed

Periscope -       https://www.periscope.tv/pseudojd/1ypKdXzRRPnKW
YouTube -         https://youtu.be/olWJrre59HQ
Media Player -    http://periscope-prod-us-west-1.global.ssl.fastly.net/vidmanlive/5OacEL_ImP5fFKIPRAKySTFZMXm1wthqts9tAkRlR3s-fmJMnE8fz9gW88UTbxFEqmmAiT_LqZqmRgHnUBLM_A/playlist.m3u8

Posted: 2/12/2017 4:11:07 PM EST

[#25]

Feed is up for me.

Posted: 2/12/2017 4:13:44 PM EST

[#26]

Quote History

Quoted:

Yeah, but they aren't controlling 10,000+ CFS worth of water flow with the wickets and brakes.

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So what do you think happens when a generator hits the 86 generator lock out and opens the 52 generator breaker that ties it to the grid and the load is suddenly removed ? My personal experience tells me that the gates close and brakes are applied and the turbine does not self destruct. I have seen this happen many times and have yet to see a turbine blow apart after the 52 opens under full load.

Posted: 2/12/2017 4:14:54 PM EST

[#27]

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Quoted:
https://pbs.twimg.com/media/C4fiNuXVMAAFj1F.jpg

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I wonder if that excavator operator on the opposite bank needs to change his pants.

Posted: 2/12/2017 4:16:37 PM EST

[#28]

Encounters with tweakers?!

Posted: 2/12/2017 4:18:25 PM EST

[#29]

Quote History

Quoted:

So what do you think happens when a generator hits the 86 generator lock out and opens the 52 generator breaker that ties it to the grid and the load is suddenly removed ? My personal experience tells me that the gates close and brakes are applied and the turbine does not self destruct. I will repeat I have seen this happen many times and have yet to see a turbine blow apart after the 52 opens under full load.

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Your job is far more cool than mine!

Posted: 2/12/2017 4:18:45 PM EST

[#30]

level 902.26 (only down by .02)
Storage 3573428
Outflow 54936 (holding steady)
Inflow 50631 (holding steady)
Riv Rel 63782

Posted: 2/12/2017 4:18:47 PM EST

[#31]

Governor says there is a drought?

Dead Kennedys California Über Alles

https://www.youtube.com/watch?v=GoA_zY6tqQw

Posted: 2/12/2017 4:19:31 PM EST

[#32]

Quote History

Quoted:

Your job is far more cool than mine!

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My job is not that cool. I work on generator excitation systems and pretty much just a computer/electrical geek. The guys who work on the turbines and that do mechanical generator work have much cooler jobs than mine ! I am hoping some day in the future my company will allow me some cross training with the turbine/generator guys so I can deal with the really cool stuff that weighs a lot and has GIANT moving parts that have to be held to extremely precise dimensions !

Posted: 2/12/2017 4:20:26 PM EST

[#33]

What the hell is up with Periscope? Updated everything and it will not work on the laptop. HP Spectre x360 I-7 win10. Foxfire or Edge.
Works fine on the android.

Posted: 2/12/2017 4:22:01 PM EST

[#34]

#OrovilleDam #OrovilleSpillway #erosion Peak flows down the hill now. Paying close attention the the edge nearest the parking lot. pic.twitter.com/M5yrEIBjSU
Jim Tyler (@jimt52869) February 12, 2017

Posted: 2/12/2017 4:22:09 PM EST

[#35]

Quote History

Quoted:
What the hell is up with Periscope? Updated everything and it will not work on the laptop. HP Spectre x360 I-7 win10. Foxfire or Edge.
Works fine on the android.

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Working fine on my 5 year old desk top, windows 10, and firefox

Posted: 2/12/2017 4:23:48 PM EST

[#36]

Quote History

Quoted:
https://pbs.twimg.com/media/C4fiNuXVMAAFj1F.jpg

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It's eroding toward the dam face. No problem.

Posted: 2/12/2017 4:25:28 PM EST

[#37]

Quote History

Quoted:

Working fine on my 5 year old desk top, windows 10, and firefox

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Think I got it.
Restarted the phone and laptop started working

Posted: 2/12/2017 4:27:54 PM EST

[#38]

from the press conference.

The 2 powerline towers down by the river are planned to be removed as soon as flow stops on the E spillway and they can get in there. They've already cut those powerlines.

The powerline tower up next to the regular spillway is still connected. They're working on plans now to remove it and re-position and reconnect it.

Posted: 2/12/2017 4:29:54 PM EST

[#39]

Quote History

Quoted:

My job is not that cool. I work on generator excitation systems. The guys who work on the turbines and that do mechanical generator work have much cooler jobs than mine !

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Can you explain how "excitation" works?

Posted: 2/12/2017 4:30:23 PM EST

[#40]

Quote History

Quoted:

Yes it is saying feed ended 3 minutes ago. I took that time to rewind the feed to see the massive chunk of dirt being calved. It was pretty impressive it is at 18:20. He reminded me of Cooter on the Dukes of Hazard he kept saying oh my god.

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Can you screen shot before and after the slip?

Posted: 2/12/2017 4:30:48 PM EST

[#41]

Posted: 2/12/2017 4:33:53 PM EST

[#42]

Love the commentary OP

Posted: 2/12/2017 4:35:00 PM EST

[#43]

Quote History

Quoted:
http://oi55.tinypic.com/24cd2f4.jpg

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That's copyright infringement, where's my free membership??

Posted: 2/12/2017 4:36:31 PM EST

[#44]

Quote History

Quoted:

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Water FO

Posted: 2/12/2017 4:37:01 PM EST

[#45]

Quote History

Quoted:

So what do you think happens when a generator hits the 86 generator lock out and opens the 52 generator breaker that ties it to the grid and the load is suddenly removed ? My personal experience tells me that the gates close and brakes are applied and the turbine does not self destruct. I have seen this happen many times and have yet to see a turbine blow apart after the 52 opens under full load.

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This guy knows what he's talking about. Seen it happen many times too. The generator usually trips the overspeed alarm as it shuts down because of the lag between the load coming off and the wickets ability to shut off the water. The overspeed is slight and doesn't cause any damage. At full speed, generator speed is controlled with wickets and load, not the brakes. Most units won't allow the brakes to be applied until the units are below 20% of full speed or somewhere around there. Applying the brakes to a full speed generator would likely start a fire. Imagine applying the ebrake on your truck at freeway speeds then continuing to drive. The brakes are only designed to bring the generator to full stop after the water has been cut off and the unit is winding down and only spinning with it's own momentum.

Does anyone know if this dam's generators are vertical shaft or horizontal?

Posted: 2/12/2017 4:37:05 PM EST

[#46]

Quote History

Quoted:

The only one I'm familiar with is in Maine, and they have a penstock about 1/5 the diameter of the others which they can use to excite the main generators

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The "house" generators at the plants I work at are not PMG. It is entirely possible that the ones you guys use are PMG and are feeding an excitation transformer that is then fed through some SCR's or IGBT's via the main excitation system to provide pulsed DC to excite the field of the generator. Its just not what the company I work for uses in their power houses.