The Most [INSERT ADJECTIVE HERE] Power System You've Ever Worked On?
- Thread starter xptpcrewx
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mbrooke
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Yea? Makes me think you know of a system which eclipses the engineering feet of Con Ed
(Excluding the Eastern and EU Interconnections themselves)Start with this >>>
Generation, incoming and outgoing is alternated across a space saving ring bus- double ring bus in larger stations.
Typically the system and HPFF cables are in groups of 5. Meaning that in an N-2 portion of the system 3 cables are sized to take on full load, and in parts of the system with N-1 criteria, 4 cables can take on full load.
So if you have a 1000 MVA flow gate, each cable is rated 333.33 MVA. Loss of two cables results in 3 carry load below the STE rating.
Same with 345kv being stepped down to 138kv:
Each 345/138kv auto is rated 420MVA, supplying 1,260 MVA of load. This means that each asset is more utilized at any given time (loading over 50%) vs classical 50/50 schemes.
Zones of protection? The concept allows you to combine them and thats needed for the lack of space in the boroughs.
See this:
By replicating the combined 7 plus zones of protection, you can loose two HPFF cables, and the remaining 3 will seamlessly take over the load.
Breaker failure is covered, because the next bay over will remove either generation or an auto, but not two auto or two supplies or two gens.
Still yet, the distro stations (ignore the circuit switchers, those have not been added yet)
Same idea. Lose any sync bus and the other still keeps the trafos in parallel. Lose any 13.8kv bus section and at most each network is put in N-2, which that its designed for. Any 15kv breaker failure results in two bus sections and maybe a trafo being removed, but neither network goes past n-2.
5 and 8% voltage reduction can help should the 13.8kv network go to N-3 or N-4 during peak load.
Outside of peak load you can lose 3 feeder cables without outages or V reduction, 4 feeders only some spots but the system still runs "normal" below its STE.
Older none double snyc bus station:
xptpcrewx
Power System Engineer
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- Las Vegas, Nevada, USA
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- Licensed Electrical Engineer, Licensed Electrical Contractor, Certified Master Electrician
Honestly man, why do you desperately scrape the internet for whatever drawings and figures you can find and fit into your narrative? For example, a simple google search reveals where you got this diagram: https://www.researchgate.net/profile/Francisco-Leon-6
mbrooke
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As I said in the NYC outage thread on August 6, 2019: public docs which I know you read-
NYC power outage
West 42nd: West 49th and West 50th st substations. Yellow arrows show 420MVA 345kv to 138kv auto transformers also based on a second level factor. Red arrows show 65MVA 138kv to 13.8kv units.
forums.mikeholt.com
We both know anything else is CEII.
mbrooke
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Critical Energy/Electric Infrastructure Information (CEII)
Recent Highlights October 8, 2023 As of October 8, 2023, requesters should use the following email addresses: foia@ferc.gov for FOIA requests; and ceii@ferc.gov for CEII requests. The Commission’s FOIA and CEII web pages will be updated to reflect these changes.
I can not share anything which fits this, or a company's own definition of it. You and I both know that.
xptpcrewx
Power System Engineer
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- Las Vegas, Nevada, USA
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- Licensed Electrical Engineer, Licensed Electrical Contractor, Certified Master Electrician
Refer to post #23 second paragraph.
mbrooke
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Con Edison is on odd, unique one of a kind system which fits this thread.
For some reason you then bring up that I'm trying to prove something by bring Con Ed into the discussion; which is in reality de-railing.
I have no agenda or point to prove other than how unique their system is, at least from how I saw it.
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xptpcrewx
Power System Engineer
- Location
- Las Vegas, Nevada, USA
- Occupation
- Licensed Electrical Engineer, Licensed Electrical Contractor, Certified Master Electrician
Like an acid in need of neutralization.
How about you actually add something constructive to the discussion?
mbrooke
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Honestly, why so negative?
If you don't agree with what I said in another thread, just move on
zbang
Senior Member
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- Roughly 5346 miles from Earls Court
Maybe I'm gullible, but I'm prepared to give everyone a go about what they say they've worked on or with. Since it's difficult to actually verify these claims, why dismiss them? It's just possible that mbrook has worked in/around the NY distribution system; its also just possible that you've worked on the DW Tunnel (and even likely that Tom worked on that reactor plant and Besoeker3 on paper mills).
Me? The "strangest" system I've worked with is high-leg delta, and I don't consider that strange at all, just perhaps a little mid-guided. It's been a boring life
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xptpcrewx
Power System Engineer
- Location
- Las Vegas, Nevada, USA
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- Licensed Electrical Engineer, Licensed Electrical Contractor, Certified Master Electrician
lol seriously? I started the discussion and I wrote post #6.
mbrooke
Batteries Included
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- United States
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- Technician
Maybe I'm gullible, but I'm prepared to give everyone a go about what they say they've worked on or with. Since it's difficult to actually verify these claims, why dismiss them? It's just possible that mbrook has worked in/around the NY distribution system; its also just possible that you've worked on the DW Tunnel (and even likely that Tom worked on that reactor plant).
Me? The "strangest" system I've worked with is high-leg delta, and I don't consider that strange at all, just perhaps a little mid-guided. It's been a boring life
I feel like no one has ever heard of a private contractor or relay test tech. Or a substation tech. Or someone who sits in an office all day verifying wiring diagram for DC and CT/PT circuits.
I hate to close this thread as I am sure there are a number of folks who worked with some most interesting or most disastrous projects which would be of interest to others however, if we can't get past the accusations and "mine is bigger than yours" comments, the thread will be closed.
Totally agree Mr Augie.
Nothing close to spectacular, just average. 
But reading what some of the extremely experienced and retired (or close to it) professionals here have done in their past is entertaining and educational at the same time.
Never underestimate the older members of the forum, they may have designed or even patented some of what others here are working with today…
But reading what some of the extremely experienced and retired (or close to it) professionals here have done in their past is entertaining and educational at the same time.
Never underestimate the older members of the forum, they may have designed or even patented some of what others here are working with today…
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
A bunch of years back, I changed employers. We were on a project at a paper mill. My temporary supervisor was discussing How we should write up the NEC issues our team had discovered.
I had to politely point out they were not violations, based on the NEC at the time I had designed and commissioned the original installation.
xptpcrewx
Power System Engineer
- Location
- Las Vegas, Nevada, USA
- Occupation
- Licensed Electrical Engineer, Licensed Electrical Contractor, Certified Master Electrician
Who was the employer?
- Location
- Wisconsin
- Occupation
- PE (Retired) - Power Systems
I have probably mentioned it before so it is not a secret, but it isn't important to this thread.
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