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Why HIGH VOLTAGE DC power Transmission

🕑 Added 2018-10-09 19:49:28 +0000 UTC

Comments

Awesome video. Ive made some thinking.. You keep producing high vol...quality videos for us and your channel is growing fast. Please take some time off with your family, dont pressure yourself to hard for our sake.. Cheers mate

Kevin Cherry

Please send me the new MAFBR shirt when its ready :)

ElectroBOOM [Mehdi Sadaghdar]

1- wire is one plate and earth is the other plate of the capacitor. There is no DC current flowing of course, but AC current going back and forth through the capacitor. The capacitance increases when the distance between plates decrease. So wire under ground create much larger capacitance

I didn't understand a few concepts in this video - 1. why if you put a cable underground it causes capacitance losses and not just leaking current? I'm trying to visualize a capacitor there, where is the plate? on the surface of the wire? 2. I didn't completely understand the calculations of non useful power on AC. how much power does a "not connected" transformer draw? what happens if I twist a coil and connect it to my mains?

I think we need a "Behind the Scenes" video where someone explains that you secretly have a Ground-Fault, Arc-Fault, and Current limiting safety power panel that you plug all this stuff into during these videos. Cause you're either a great showman and doing this safely or you just have amazing eyebrows of steel. For some reason a mockumentary-type thing just flashed through my mind of ElectroCute doing a whole discovery channel type thing of "Here we have the wild ElectroBoom in his natural habitat" meanwhile you are over on a video electrocuting yourself or just staring in the mirror flexing your brows.

Felix

They probably use giant (inverted) rotary converters to get nice pure sine waves synced to the grid. Basically an hybrid between a DC motor and an alternator. Scratch that. Just did some research. They use huge thyristors and then a football field of inductors and capacitors to filter that shit out.

You should cover why Kerrington Events fuck up the power grid next!

Is there pwm on the inverter part converting back to HVAC? I can't imagine that square wave you showed would be all that great to use.

Sarah Kaylor

Very interesting. I always wondered how they did that.

Christopher Bassett

Great video as always! I would love to dive deeper into electronics with something better than my $20 chinese scope. Cheap and tells me enough but I would love to have a quality scope someday! One note on the video though, DC transmission is also used in North American interconnection-connections. AKA the connection of 2 AC systems that are not on the same frequency timing or voltage etc that you explained.

I think I missed out on the contest... or did I?

Nice video! Now I know why DC networks still exist. I never mind that power lines admittance and reactance have no effect in DC. Engineers frequently use the words lagging and leading to describe relative phase position between the current and the voltage. You should make a video about compensation, regulation and other methods used to solve some problems faced in AC networks. They are not only power lines and transformers in networks.

Bill Browning

HVDC lines also require a different kind of fault protection as well. We are very good at protecting HVAC line networks from all kinds of faults, but the schemes are different for HVDC. Because they are not AC, we have no fault direction or distance information from phase angles and sequence components. We have to use traveling waves. Since the DC fault impedances are so low we have operate very, very quickly because the currents are much larger. Also we typically use communication on AC lines with carrier radio or fiber to facilitate high speed tripping. The DC lines are so long that communication is a challenge. (Long time utility protection engineer here).

Right, I'm an aircraft electrician by trade and didn't think of this kind of stuff. Thanks man. I can Always count on you for learning me something.

Nice explanation of Power Factor and why actual power is different than apparent power. It was also a great demonstration of vampirical power loss even on powered off devices (assuming switched after the PSU). Admittedly, I winced every time your finger hovered around that transformer output lead.

James Holmes

Amazing how detailed a fifteen minute video is compared to an entire electrical career for getting the little known facts. Thanks again

Mike oliver

Great explanation but my eyes kept drifting to that gorgeous Keysight scope, made it harder to learn. I'll bet if I had my own Keysight scope it would be much easier.

Dibya Jyoti Roy

My whole electrical life was a lie. Thank goodness, I chose my field as software engineering instead of electrical engineering. :P

Steve LoGiudice

We have one here in Washington/Oregon down to California, Pacific DC Inter-tie. On google maps look for The Dalles, Oregon and you can see the multiple substations just east of the city. <a href="https://en.wikipedia.org/wiki/Pacific_DC_Intertie" rel="nofollow noopener" target="_blank">https://en.wikipedia.org/wiki/Pacific_DC_Intertie</a> I've been told by my electronics instructor I should visit it at some point. It supposed to be used to provide air conditioning to California during the summer and heat for us in the winter.

The oscilloscope would work great for building my ham radio lol

ElectroBOOM [Mehdi Sadaghdar]

me too. I gave up, just giving away things now

Helge Kaiser

MOTHER of ALL FULLEST BRIDGE RECTIFIER :) Sounds like a new generation of T-Shirts........

Mark Roberts

So excited!

please give me scope! Awesome video!

Yousef rawas

I wish i could win any luck based thing in my life that'd be great

ElectroBOOM [Mehdi Sadaghdar]

Awesome!

Robs Repairs

Your doing a great thing helping us all learn. My daughter loves your video's and wants to be an engineer like you and she has made me a proud farther.

I'm so glad I am a patreon. These video's are worth 15 lessons from my teachers… I'll tell my classmates to support you. Defenitely worth it! Thanks!

So now my brain is sore, but you make it easy to watch this over and over until it sinks into my bonehead!

10:54 it looks like you wrote "some gay" instead of some guy. Great vid by the way

Hilarious, ingenious and easy to learn from. As always, one of the best people on Youtube!

I've been studying electrical engineering over the last couple of years. Its sad to say that I had lost all interest in my studies due to shitty professors. You are the reason I came back man. I love how you make things more understandable through humor. Keep up the good work. :)