Power systems question

File: 133 KB, 1080x1116, 1559206538066.jpg [View same] [iqdb] [saucenao] [google]

Power systems question Anonymous Sun Mar 1 17:46:44 2020 No.11432345 [Reply] [Original]

I posted this on /sqt/ but got no answers and can't find an answer anywhere else so in making a thread.

Where doing asymetric fault analysis and there's something that doesn't add up.

By definition, the impedance matrix of a system is the inverse of its admittance matrix, this is:
[eqn]Z_{bus} = Y_{bus}^{-1}[/eqn]

Because of this fact, whenever we've had to use the impedance matrix, for example to get the thevenin impedance a bar "sees", we simply construct [math]Y_{bus}[/math] and then invert it.

The problem is, now that we're doing asymmetric faults, You need to know the thevenin impedance each bar sees in every sequence in order to compute the fault voltages and currents for each bar. basically we need [math]Z_{bus}^{(0)},Z_{bus}^{(1)}[/math] and [math]Z_{bus}^{(2)}[/math]

Now, the book were using (Stevenson, Grainger) uses an algorithm to build the [math]Z_{bus}[/math] of a system directly from its diagram and this works just fine, but if you construct [math]Y_{bus}[/math] for lets say the zero sequence network and then invert it, you get a [math]completely[/math] different matrix from the [math]Z_{bus}[/math] that was built directly using the algortihm.

This is a major issue because we don't know how to use that algorithm (prof didn't teach it) and we have no time to learn it.

Tl;dr why does constructing [math]Y_{bus}[/math] and inverting it does not yield [math]Z_{bus}[/math] when dealing with sequence networks?

(Is coffee good for you?)

>>	Anonymous Sun Mar 1 17:50:26 2020 No.11432353 >>11432345 Maybe try posting without the whores next time. Perhaps the reason you're struggling with this basic problem is due to your porn-addled coombrain

>>	Anonymous Sun Mar 1 17:52:11 2020 No.11432357 >>11432353 1) Im not "struggling with a problem", im asking a theoretical question 2) I don't watch porn

>>	Anonymous Sun Mar 1 18:02:59 2020 No.11432390 dikc hard

>>	Elder NPC Sun Mar 1 18:10:10 2020 No.11432411 File: 17 KB, 619x495, images (4).png [View same] [iqdb] [saucenao] [google] >>11432357 Studying is the repetitive observation of a moment to simulate proficiency or acceptance by some future narrative. Much like porn.

>>	Anonymous Sun Mar 1 18:48:20 2020 No.11432544 >>11432411 Are you a new schizo or just tooker with a different name?

Elder NPC Sun Mar 1 19:08:22 2020 No.11432591
File: 12 KB, 640x640, AInitial.png [View same] [iqdb] [saucenao] [google]

>>11432544
You must be new here. I've never seen anyone post as Anonymous before.

>t.Solivagus

I feel like empowering the word schizo has been one of the more entertaining products of 4chan.

>>	Anonymous Sun Mar 1 19:09:12 2020 No.11432596 >>11432544 Neither. This is ECHS aka KumKum aka Solivagus aka Elder Sage aka Simon which has been the lovable artist in resident of /sci/ the past 2 years.

Elder NPC Sun Mar 1 19:14:58 2020 No.11432613
File: 34 KB, 640x480, images - 2020-03-01T175215.233.jpg [View same] [iqdb] [saucenao] [google]

>>11432596
What? No home address? I keep posting it. *shrug* oh well.

>The longer my honest expression is discarded or excluded the stronger my private life becomes. Basic power slip differential.

I guess all moments prior to this one has brought me to express that art IS a science, as mathematics is a language, and projective geometry the acceptance of both.

>>	Anonymous Sun Mar 1 19:18:15 2020 No.11432619 >>11432613 What a captivating poem describing narcissistic injure!

Elder NPC Sun Mar 1 19:23:18 2020 No.11432628
File: 74 KB, 605x507, images (2).png [View same] [iqdb] [saucenao] [google]

>>11432596
What? No home address? I keep posting it. *shrug* oh well.

>The longer my honest expression is discarded or excluded the stronger my private life becomes. Basic power slip differential.

I guess all moments prior to this one has brought me to express that art IS a science, as mathematics is a language, and projective geometry the acceptance of both.

>>11432619
Clip related: https://www.youtube.com/watch?v=orv8UG7WHPQ&t=33

>>	Anonymous Sun Mar 1 20:13:11 2020 No.11432733 >>11432591 >>11432596 >>11432613 >>11432619 >>11432628 Can you please fuck off with your schizo ramblings and can someone pls for the love of god answer my fucking question?

>>	Elder NPC Sun Mar 1 20:17:59 2020 No.11432742 >>11432733 No! This is MY dopamine! Rar!

>>	Anonymous Sun Mar 1 20:58:54 2020 No.11432808 Bumping for actual interest and curiosity.

>>	Anonymous Sun Mar 1 23:51:03 2020 No.11433148 >>11432596 >autist Weird way to spell 'schizo'.

>>	Elder NPC Mon Mar 2 00:14:46 2020 No.11433189 File: 30 KB, 553x554, images - 2020-03-02T101746.750.jpg [View same] [iqdb] [saucenao] [google] >>11433148 Weird way to misinterpret my opinion of myself. I wonder what other bullshit people will presume is more important than my opinion of myself.

>>	Anonymous Mon Mar 2 00:21:11 2020 No.11433198 >>11432345 Btw did some research and you can absolutely find zbus for each sequence network by inverting ybus, idk what I and my friends were doing wrong that it didnt work. Mods delete this thread now pls.

>>	Anonymous Mon Mar 2 00:24:16 2020 No.11433200 >>11432345 Just so you guys know, I come to /sci/ mainly for pictures of hot women and I'd probably open it a lot less if it weren't for it. Anyway I thought I'd tell.

>>	Elder NPC Mon Mar 2 00:34:28 2020 No.11433216 File: 50 KB, 494x620, images - 2020-03-02T163410.138.jpg [View same] [iqdb] [saucenao] [google] >>11433200 gasp you're a pixalist! How dare you discriminate against pixels! All pixels were created equal and are as beautiful as each other! For SHAME!

Anonymous Mon Mar 2 00:50:17 2020 No.11433247

-----------TRASH ATTIVE ANSWER-----------

Zbus= (Ybus)¨^-1

is thaat the equation. as you question with the impedance matric being the inverse of it's input matrix I W<1 0 0 1
5 0 0 2
6 0 0 3
12 0 0 14> {synonymous, > 2 0 0 2,
10 0 0 4
12 0 0 6,
24 0 0 28 (trash response)

>>	Anonymous Mon Mar 2 01:13:48 2020 No.11433296 >>11433189 that picture is hot

>>	Anonymous Mon Mar 2 01:18:38 2020 No.11433305 >>11433200 well to be fair they look pretty damn good

>>	Anonymous Mon Mar 2 02:44:17 2020 No.11433413 >>11432345 moar

>>	Anonymous Mon Mar 2 03:42:32 2020 No.11433496 Is coffee good for you

>>	Anonymous Mon Mar 2 05:16:45 2020 No.11433600 >>11433296 Wouldn't that be rather distracting?

>>	SAGE Mon Mar 2 11:17:12 2020 No.11434114 >>11432353 this unironically I never respond seriously to clickbait such as this. SAGE

>>	Anonymous Mon Mar 2 19:09:04 2020 No.11435239 >>11432345 please god tell me there is porn of these two.

Anonymous Mon Mar 2 19:24:45 2020 No.11435274
File: 70 KB, 800x704, __inaba_tewi_touhou_drawn_by_poronegi__7a23eb2e8b927da46c72ffce113de781.jpg [View same] [iqdb] [saucenao] [google]

>question is posted in /sqt/
>no replies
>reposted as a thread
>a bunch of schizo replies
Like pottery.

If I had to guess, it's either a typo or you're fucking up applying the algorithm. I'll download the book and be right back.

>>	Anonymous Mon Mar 2 19:25:31 2020 No.11435277 File: 3.61 MB, 480x454, z9dfj8.gif [View same] [iqdb] [saucenao] [google] >>11435274

>>	Anonymous Mon Mar 2 19:26:15 2020 No.11435279 File: 1.15 MB, 1536x2048, E76CB616-AA2A-4C2A-BD1B-766401F0CD1E.jpg [View same] [iqdb] [saucenao] [google] >>11432353 How do i stop being a cumbrain, i literally cant stop thinking of women

>>	Anonymous Mon Mar 2 19:27:10 2020 No.11435280 File: 158 KB, 1077x1616, 111.jpg [View same] [iqdb] [saucenao] [google] >>11435279 here, take this

>>	Anonymous Mon Mar 2 19:35:31 2020 No.11435297 >>11435279 she's utterly repulsive, get checked

>>	Anonymous Mon Mar 2 19:40:41 2020 No.11435307 >>11432591 based schizo tripsexual coffee inquirer status: rekt and seething

>>	Anonymous Mon Mar 2 19:41:44 2020 No.11435309 >>11435279 looks like my ex

Anonymous Mon Mar 2 19:44:50 2020 No.11435318

>>11435274
I already answered my own question and posted the answer here >>11433198

The issue was that our prof absolutely fucking sucks and gave us bad data for a problem, as in she wrote some impedances or some shit wrong and the the Solutions manual was using the correct ones

>>	Anonymous Mon Mar 2 19:46:14 2020 No.11435324 >>11435318 Ah, good.

>>	Anonymous Mon Mar 2 20:45:01 2020 No.11435418 File: 297 KB, 2048x1536, hN-_vWrQzIVp2Ixw-OVRs3w3nbQnNQTgH2fhIqDEhzM.jpg.jpg [View same] [iqdb] [saucenao] [google] >>11435279 I can't stop,

>>	Anonymous Mon Mar 2 20:54:24 2020 No.11435442 File: 338 KB, 458x353, ...43.png [View same] [iqdb] [saucenao] [google] >>11435418 jesus your taste in women is atrocious

>>	Anonymous Mon Mar 2 21:04:00 2020 No.11435462 >>11435442 >My opinion is fact

Elder NPC Mon Mar 2 21:46:56 2020 No.11435529

>>11435418
I don't actually think about women per se. I project narratives onto everyone but I discard ALL of them upon interaction because most humans dislike deep packet inspection.

What is it like to think about women constantly? Are they actually doing anything or is it a scenario where they are constantly trying to get your attention for some semi-unknown reason?

>Genuinely curious as I have sexually dominated all my partners and am usually the narrative generator for sexy times.

>>	Anonymous Mon Mar 2 21:50:49 2020 No.11435538 Caffeine is bad for you

>>	Elder NPC Mon Mar 2 22:33:25 2020 No.11435607 File: 1.30 MB, 4032x1860, 15832063607922178250521046150490.jpg [View same] [iqdb] [saucenao] [google] >>11435538 Oxygen is worse.

>>	Anonymous Mon Mar 2 22:39:50 2020 No.11435619 >>11435538 >JUMP IN

>>	Anonymous Mon Mar 2 22:45:21 2020 No.11435633 File: 147 KB, 1080x1116, Science & Math.jpg [View same] [iqdb] [saucenao] [google] >>11435619 >Is math bad for you

>>	Anonymous Mon Mar 2 23:43:19 2020 No.11435748 >>11435418 Saved. Thanks.

>>	Anonymous Mon Mar 2 23:50:00 2020 No.11435770 >>11435633 Jesus bro. Damn. Ive never regretted making a thread this much

>>	Elder NPC Mon Mar 2 23:54:27 2020 No.11435778 File: 41 KB, 678x452, images - 2020-03-03T155409.350.jpg [View same] [iqdb] [saucenao] [google] >>11435770 You're welcome.

>>	Anonymous Tue Mar 3 00:08:50 2020 No.11435808 >>11432357 Not him, but this is provably false. 1. You are posting on 4chan. Therefore, you are male. 2. All men watch pornography. Therefore, 3. You watch pornography. Q.E.D. 4 COROLLARY: you are a liar.

>>	Anonymous Tue Mar 3 00:18:57 2020 No.11435827 >>11435529 wtf u are a sperg

>>	Elder NPC Tue Mar 3 00:20:41 2020 No.11435830 >>11435827 What is a sperg and how would awareness of said label foster future integration?

>>	Anonymous Tue Mar 3 01:51:21 2020 No.11435929 File: 188 KB, 750x933, coffee.jpg [View same] [iqdb] [saucenao] [google] >>11435770 fuck bro I just cant go against my biology

>>	Anonymous Tue Mar 3 01:53:42 2020 No.11435932 >>11435808 >1. You are posting on 4chan. Therefore, you are male. Fuck you.

>>	Anonymous Tue Mar 3 01:59:34 2020 No.11435936 File: 90 KB, 750x933, coffee time.jpg [View same] [iqdb] [saucenao] [google] >>11435929

>>	Elder NPC Tue Mar 3 05:26:37 2020 No.11436163 >>11435932 Anonymous is a samefag hivemind of males who are scared of being identified. Thought this shit was common knowledge. Just because some Anons have vaginas doesn't change that reality. >drink da kool-aid sistah!

>>	Anonymous Tue Mar 3 05:52:54 2020 No.11436189 >>11435239 The thread has already derailed so, no there is only teasing. Still quite fappable.

>>	Anonymous Tue Mar 3 05:58:40 2020 No.11436195 this is what happens when you ask for homework help welcome to /sci/, bitch

>>	Elder NPC Tue Mar 3 06:01:55 2020 No.11436199 >>11436195 Correct. I do stick by THAT rule. This board is for fringe discussion and un-derailable communal benefit of society without direct need for reward or renown. Like that superpermutation proof by Anon.

>>	Anonymous Tue Mar 3 06:16:55 2020 No.11436223 File: 118 B, 16x16, 1577882064981.png [View same] [iqdb] [saucenao] [google] >>11436199 >Without direct need for reward or renown How ironic. You don't usually post these pleb memes either, did something happen at school?

>>	Elder NPC Tue Mar 3 06:30:14 2020 No.11436239 >>11436223 I don't have an adequate translation for your narrative there. I might need a plugin update.

>>	Anonymous Tue Mar 3 10:58:50 2020 No.11436752 >>11432345 hot af but decided to have fake tits. fuck women

Advanced search
Text to find
Subject [?]Search by post subject. Leave empty for any.
Username [?]Search for user name. Leave empty for any user name.
Tripcode [?]Search for tripcode. Leave empty for any.
Email [?]Search by email. Leave empty for any.
Filename [?]Search by image filename. Leave empty for any.
From Date [?]Enter what date to start searching from. Format is YYYY-MM-DD
To Date [?]Enter what date to start searching until. Format is YYYY-MM-DD
Image hash
Search in	All Posts OPs Only
Deleted posts	Show all posts Show only deleted posts Only show non-deleted posts
Internal posts	Show all posts Show only internal posts Show only archived posts
Order	New posts first Old posts first
Capcode	All Posts Only by Users Only by Mods Only by Admins Only by Developers
Results	Posts Threads
Action	[ Simple ]

/sci/ - Science & Math