Pushing power into the grid (with a grid-tied inverter) (AKIO TV)

In this video, we make the inverter from last time grid-synchronised, and use it to deliver electricity to the power grid!
(AKIO TV) MMXXII / actual_akiotv

[@codebeat4192]

Fair explanation. There is something funky going on because you put in a square wave to the transformer, the result in the transformer isn't a perfect sinus. That is probably the loss of 30W because of conflicts but also we don't have seen your whole setup and your arduino code how you did this. If you use the Arduino library and don't use registers or assembler yourself, it will get quickly out of sync. Anyway, this works only when the output voltage is slightly or much higher than the mains voltage. You said it outputs 240vac, in Europe we have 230vac, so it 'works' because of the higher voltage. Anything else connected in the same group starts to consume your power. You don't feed any power to the grid, some other devices in the group starts to use it or it is due power losses. That is what you are measuring. The highest voltage is leading and provides the current. About feeding back to the grid. For example you can have a 1000W inverter and connected to the grid but when there is no consuming device, nothing happens with the available energy. To be able to pump the available 1000W into the grid, it must be used by something. Don't assume you can feed power into the grid when it is not used.

[@solidfuel0]

He says he increases duty cycle to increase pushed (export) power. But that doesn't make sense . I agree with you that higher voltage will push the power to the grid because of other consumers on the grid. Am I correct?

[@emmavanderniet2847]

Mooi whiteboard 😉

[@dorito_mauller]

You're underrated how is this possible with good content.

[@outerrealm]

Because he looks like an amateur with that microphone crudely duct taped to a piece of wood instead of a proper shock mount and mike stand.

[@DavidJJJ]

This was excellent, I actually learnt how my grid tie inverter works! I have one of those chinese 'auto islanding' grid tie inverters and I thought naively that it just 'pushed more power back in' but didn't think about the phase, that all makes sense now, thanks for the detailed explanation.

[@peerzadaiftikhar1]

Good explaination...Actually these inverters are triggered by feed from the mains supply to be in same phase and zero time lag .

[@damnedattendant2536]

You have me in the fam now .. I'm actually an embedded software engineer .. not much exposure to this tech .. mostly involved in BMS and Other simple IOT applications but I want to know about this stuff ... keep going man .. I'm onboard ..

[@ZeroNiteLite]

That was cool!

[@EdmundWChan]

thx for the vid!

[@josephkron4484]

Great video, I'd love to see the thd and power factor of this inverter, as well as you're utility's response if you ever apply for an export capacity

[@AKIOTV]

According to the meter the power factor is about 0.5 haha. I've had several people ask me for schematics etc (which I don't have btw) to build one themselves, but I've been telling them over and over it's not a design anyone should actually use, it's only for educational purposes haha.

[@muhammadramadan1966]

Could you upload this project to your warehouse it’s so helpful

[@boxcutter0]

Quality content, cheers

[@beholder4465]

New fan here !! Got me on this video🙌🏻 i would be trying this out after researching more this video on exactly what you did✌🏼

[@AKIOTV]

Great! thanks for watching :)

[@TheMaxis9]

What was that vibrating sound. is that transformer plates?

[@PRCVasconcelos]

Nice video! 👏🏻 It’s possible to inject ac power on other ac grid. Example an 110v ac grid to another 220v ac grid… ? Thanks

[@AKIOTV]

If the frequency and phase is the same, all you need to do that is a transformer. If the frequency or phase is different (eg 50hz to 60hz) you first need to rectify the ac on the input to DC, then use an inverter to produce the frequency/phase you need on the output.

[@alibenkhalid4192]

Why did tesla have to win?! (ﾉ °益°)ﾉ As always, great video, man! We're watching your growth closely!

[@mohamedatti8659]

plz do a video about mppt in a grid tied pv system

[@peerzadaiftikhar1]

MPPT is actually a buck boost transformer..!!

[@yordannedelchev4784]

So the two voltage waves are the same? Is saying that the voltage is the same, but loads draw from the inverter simply because it is closer correct?

[@AKIOTV]

That's a simplified way of saying it but essentially yes.

[@yordannedelchev4784]

@@AKIOTV As I wrote that comment I also realized that unlike water current flows everywhere proportional to the resistance of the paths. Does this mean some current always goes to the grid? I feel like I'm missing something obvious. Sry for taking your time.

[@AKIOTV]

@@yordannedelchev4784 This is very difficult to explain in general, and especially in a comment. Therefore I've made a little simulation model. You can open it in a web browser and play around with it. That way you can see very easily what's going on, as the tool animates how current flows. I think that will clear things up quite well. I'm not sure how well it works on mobile, so I recommend you open it on a PC. here's a link to it: falstad.com/circuit/circuitjs.html?ctz=CQAgjCAMB0l3BWcA2aAOMB2ALGXyEw1sESQBmckJBSagUwFowwAoAJXAE4AmEHtGm58ekIXQi0KPJHTnQEHEJlEViIDMjXYo4anXIzd8xQCdh2ipB3l1E1ufLXL+S-fMJellQbvhWRBBONurB1AK6PFws0DgIKoSkmMhUYHD8TlDQOjDYrADmVjoIEWHxWnIFIK4lQjXJxgEY1WBatjo1EXSYaJTomK3YXNat-OlgqrlZeQDOFgJCYF7txiAAZgCGADYz9KwAHhlIPGBU5GDHozo8OgCWAHYAbvSmAC4vBxoIbWhcGlxtLzXHT5Uy3AAmrAA7tRlupXCtIKwAEbgCYoOikHTIHhUJGHbDqAhUUh-AhaYEgAAWAHsAK67T6ULSEGxcElYar8HRbGkbcEzT7xOqjTC2Fp-SlQ26megAHRmspmtxmrw29wAxntDshsHQeDwtAChAbJeA6KCIQqAA40qEvBUACnu9HyG1et2eCrlAEcFZbwQqZnTrdatrd6DMbXaXgAaaPKj1eqN+mYBhWyrWeyPR+2mACUQoI1GQmOQLJSXLSIDlSL1VF1+r1ymQQjCEgA+rqO5gO3quFwu3qO+RoDwO8wO2ApwJ8bDMbgQFwhtRsB1wHwGfKZjNw+CHTMafcFa8qduwfkqa8nQAiAC2G32CseNK2avy9Bv+ZPNIVDw1sobLsf5PC87ymLmB6MIwAB8rDinQABiEAGEY5BSMwIAALKPgqABqr7vnsQA I know you may not trust a link like that from a random guy on the internet. If you don't trust it perhaps check out the tool for yourself first: falstad.com/circuit/

[@yordannedelchev4784]

​@@AKIOTV I do trust it. Thanks. Alredy played with it. MB I will try and research some actual values.

[@yordannedelchev4784]

@@AKIOTV Thanks. I appreciate you investing time into that for me! It helps.

[@brainnet8138]

Hello dear friend I like building my own grid tie inverter can you i the schismatic and code?

[@AKIOTV]

I don't have any more detailed schematics than shown in this video and the one before. I also do not recommend you directly copy this design, it needs a lot of modifications to be efficient and safe.

[@brainnet8138]

Hello,thanks for quick reply i am still looking for code if any one can share. Otherwise I will try if I can make one

[@nielsdaemen]

Please put a scope on it to show the horrible waveform polluting the grid!

[@AKIOTV]

Didn't have a scope at the time of making this. Now I do, but the device has been dismantled haha. I plan to make a new better inverter sometime soon.

[@nielsdaemen]

@@AKIOTV That's great, cant wait to see it

[@emmavanderniet2847]

🧸

[@yordannedelchev4784]

Hello again. I have questions but don't wanna be a bother. You should make a Patreon or something.

[@AKIOTV]

bit too soon for a patreon I think

[@yordannedelchev4784]

@@AKIOTV MB, but when it's time I hope there is a "Answering questions" section. :D I was learning how those old electrical meters spin backward. I understood that the current is 180 degrees in reference to the voltage when the power goes the other way. But still have a lot of trouble understanding it.

[@AKIOTV]

@@yordannedelchev4784 what is the trouble?

[@yordannedelchev4784]

@@AKIOTV When I turn the meter around I get that I turned the current coil 180, but doesn't that also happen at the voltage coil. Still can't quite comprehend two-way power measuring.

[@AKIOTV]

@@yordannedelchev4784 When you flip the meter, the meter sees the current in the live wire running in the opposite direction, which is the same as a 180 degree phase shift. The voltage however, doesn't change, because the polarity of the meter remained the same. It still measures the voltage on the same live wire, relative to the same neutral wire. and of course the power is then a multiplication of the current and the voltage.

[@lavanlukes1277]

Repeate much

[@outerrealm]

You want us to respect your engineering skills while you use that duct taped abomination of a home made microphone stand?

[@zerellix]