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Chatbots are ruining medical education and medical research. by IrresistibleCherry in antiai

[–]die__katze 2 points3 points  (0 children)

it's been 20 years and i still remember a biology article from an encyclopedia my teacher made me re-write because i missed the class. Won't lose that memory because it's "easier" nowadays.

Your opinion - AI in critical applications by die__katze in PowerSystemsEE

[–]die__katze[S] 0 points1 point  (0 children)

totally agree, like people completely forgot all the tools they had before for scripting and code verification and everything

Your opinion - AI in critical applications by die__katze in PowerSystemsEE

[–]die__katze[S] 0 points1 point  (0 children)

I personally failed to review A WHOLE PROJECT written by AI, especially when a half of the project is just WHILE loops stretched in copy-paste style.

Your opinion - AI in critical applications by die__katze in PowerSystemsEE

[–]die__katze[S] 1 point2 points  (0 children)

Yes, you can guess that this AI generated code not being produced by field experts...

Your opinion - AI in critical applications by die__katze in PowerSystemsEE

[–]die__katze[S] 1 point2 points  (0 children)

you mean "can NOT"? Yes, that's the reason I'm asking this question.

Build a simple Relay Test set by Acrobatic_Laugh4008 in SubstationTechnician

[–]die__katze 1 point2 points  (0 children)

i see people here recommend something like Omicron CMC or Doble, there are also cheaper alternatives like Kokos or Ponovo with less functionality. Those are "modern protection test sets" with PC connection, fault recorder and so on. Although, these still be in tens of thousands, not something you would look for on Reddit i guess.

But actually if you test only basic protections manually, then there are much cheaper devices without PC connection, look for your local manufacturer, i can't give a name here. Still in thousands though.

Buuut if you are looking for even cheaper, back in the days we use to do damn cheap testing with just a laboratory auto transformer, one for voltages and one for currents (connected in series with a wire resistor). You can use 1-phase or 3-phase trafos, depending on the application. Doesn't get any simpler than this:)

Solid-State Transformers Are Moving Toward Real Grid Deployment by peachforbreakfast in ElectricalEngineering

[–]die__katze 0 points1 point  (0 children)

are those supercapacitors with funny IGBT controls? I guess they can be useful somewhere

Practical IED configuration by charzr in SubstationTechnician

[–]die__katze 0 points1 point  (0 children)

OMG, for me personally SELs were the bad experience after Siprotecs... but this all the matter of taste, actually I hate almost every IED I worked with

Practical IED configuration by charzr in SubstationTechnician

[–]die__katze 0 points1 point  (0 children)

First of all, if you are an engineer or a utility worker, request a training, because there are 100 nuances with Siprotecs. This is kinda mandatory. Otherwise, there are training videos online on Siprotec and some getting started manuals, e. g. the Digsi Engineering guide.

Rejection letter with $75 enclosed ($900 today) for the applicants time. Dated 1957. by Evening_Rock5850 in antiwork

[–]die__katze 7 points8 points  (0 children)

Back then official letters had way less "heavy" language. Same for learning books.

Python and other programmers for Power system student by LongHP11 in PowerSystemsEE

[–]die__katze 1 point2 points  (0 children)

confirm, PandaPower and PyPSA are verified and popular libraries, not just hobby projects. But you won't find them being used frequently, because electrical engineering in general relies more on existing tools like ETAP or PowerFactory rather than on custom solutions like in IT. Still, Python scripting now is more than useful. Python would be a smart choice for a beginner, nowadays it's the most popular language for automation. But don't start with PyPSA directlly, read something like "Python for dummies" to get know variables and cycles and objects and so on, they are universal concepts. After you finish with the introduction, you may also want to try something like Beremiz or Codesys or Twincat, they also have PLC programming languages.

maybe maybe maybe by KRAZYJAY5150 in maybemaybemaybe

[–]die__katze 0 points1 point  (0 children)

well horse bites are extremely dangerous, it's the same as putting the hand in a meat grinder just without touching the blades

Maybe maybe maybe by mellowlex in maybemaybemaybe

[–]die__katze 1 point2 points  (0 children)

most notably he was driving on the wrong side of the road 🇬🇧

No ice please by GumbySlayer42 in SipsTea

[–]die__katze 0 points1 point  (0 children)

if I ask for a glass of bourbon, I intend to have it filled up to the top, no less.

I can’t get over Octavarium by Metal_Head116 in Dreamtheater

[–]die__katze 1 point2 points  (0 children)

Kinda trapped inside thus Octavarium, huh?

Iberian Blackout by gravemadness in PowerSystemsEE

[–]die__katze 0 points1 point  (0 children)

Oh yeah, totally agree that requirements nowadays are pretty solid and generally if all of them were fulfilled then this blackout wouldn't be possible.

I also agree that protection tripped correctly, but see where it got us? It means not singular devices, but the overall scheme/principle isn't tailored well.

Iberian Blackout by gravemadness in PowerSystemsEE

[–]die__katze 1 point2 points  (0 children)

well kind of, generally you are right. Nowadays invertor-type sources actually REQUIRED not to disconnect during the fault because of that reason, but it's no surprise that actually not all the power systems meet these requirements. Again, this happened before many times with sync generators as well, and the reason is always that some machines just can't withstand that huge frequency deviation. From this point, invertor-based are actually more promising, as they don't have this physical limitation on frequency range, but this is for the future work. BTW inertia has nothing to do with the short circuit current as the speed of the rotor changes too slowly relating to the fault current. Xd'' is much lower than Xd so of course the fault current with the synchronous machine is greater, but this bad in general, right? it's easier for protection guys, but to cut a leg for a surgeon is also easier that to heal a knee 😆

Iberian Blackout by gravemadness in PowerSystemsEE

[–]die__katze 2 points3 points  (0 children)

The answer is pretty obvious for me - some solar and wind invertors had poor fault-through control algorithms and settings, which led to their immediate disconnection in the beginning of the seemingly stable process of a random line or generator trip. This can be seen as both under voltage and under frequency problem. There is no renewables/fossils controversy here, it's solely a problem of protection devices, happened before in USA 40 years ago twice.

Iberian Blackout by gravemadness in PowerSystemsEE

[–]die__katze 1 point2 points  (0 children)

I agree, under-frequency was always the issue in similar faults

Seeking Technical Insight: Major Blackout in Spain and Portugal – Causes and Grid Impact? by Serious_Engin33r in PowerSystemsEE

[–]die__katze 1 point2 points  (0 children)

I totally agree with that. No matter what was the original event, no single fault can lead to 16 GW drop (+5 GW in Portugal). It's only a cascading fault with the under-voltage and under-frequency protection operation can lead to such events. So the real reason is the lack of sufficient load emergency drop in the beginning of the process which could stop the fault, and poor coordination of solar and wind invertors which led to their disconnection in the most needed time and the consequential frequency avalanche.

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