Synchronizing AC generators -- Part 4 (phase deviation)

[@RC-nq7mg]

Put an overload relay on the contactor and demonstrate pole slip! I am sure we all want to see it!

[@PatrickKQ4HBD]

Yeah!

[@psy0rz]

Thats why im here! I would love to see a demonstration of different failure modes

[@Ry____]

I want to see an out of sync close as well

[@johnnok7775]

If this were tried in 2 5000w generators, I wonder if the 20a breaker would be enough to protect from pole slip. And if there would be any other items that may not like connecting this way, like an automatic voltage regulator module

[@NaVi2GAtOr]

You did a great job! I watched Parts 1 to 4, was very helpful for Unterstanding! Thanks a lot!

[@berkayklc8636]

Excellent explanation and demonstration!

[@MrTuber7117]

I always wondered how, if at all, the utility companies connect themselves to the grid and run in "parallel". This is an awesome scale-model demonstration that makes it clear! Thanks for posting this!

[@fiver-hoo]

Am i the only one who got a little nervous with him waving his fingers around and operating dials with all those spinamathingies going around haha. And a wedding ring too! Fantastic video series. Way to crush out a pretty complex topic in 16 minutes in such a clear understandable manner. I am now smarter.

[@arjovenzia]

Exactly what i was trying to find! I learn much better seeing n doing. Reading the theory lets you understand the situation, but the physical implementation is where you learn. Thanks a bunch, very much appreciated.

[@nelsonpalomo2688]

Hola , tienes algun video en español. Quiero aprender esto . Se ve todo muy bien

[@HarblesTheSkeptial]

Very effective demonstration. I have a minor technical niggle though. It may improve the visual indication of the phase difference (relative tape position) if the camera was placed farther from the table but the lens zoomed in to compensate which would cause an optical compression such that the two rotating pullies appear closer to the same size. Just a thought.

[@jasonpeace91]

thank you for these videos learned allot thank you I assume due to the electrical coupling that if one belt to break that they would both keep spinning aslong as there wasnt an overcurrent event and the remaining generator could handle the addtonal load

[@yashuamessiah3922]

Was a great job in explaining this I'm currently trying to build what you have made for my Rv wish I had your help with the build

[@alan.macrae]

What happens to the frequency of the grid power the generators are supplying when you do this?

[@sardarmuhammad405]

Great 👍 Plz make a video on different rpm generator syncing detailed video 🙏

[@tleshovzhandos]

I totally agree with other commentators that you've done a great job, sir.

[@christophergwaltney6294]

is this a 24v system.... the rectifiers removed and the three phases isolated? what do the transformers do boost the 12v to 120v?

[@ashleyzinyk4297]

When the generator is driven by a steam turbine of, say, 1 million horsepower, and the load is a medium-sized city, energy must be flowing out of the plant, surely. In that case, can the lagging generator still be acting as a motor? Is it a superposition, like one machine is acting as 100% generator and 1% load (total output 99%), and the second machine is acting as 100% generator for the grid and 1% generator to the first machine (total output 101%)? Or is there a better way to think about it?

[@adaptine]

Are those car alternators? In that case. How did you hook up to the windings?

[@BTCInstrumentation]

We opened up the alternators and simply wired three 12-gauge conductors to the input terminals of the bridge rectifier assembly, then ran those wires out some of the holes that were already in the Delco-Remy alternator case. Some heavy-duty alternators such as Leece-Neville units already have three studs on the back pre-connected to the stator windings, but since I'm building six of these generator stations going with expensive Leece-Neville units would have broken my budget.

[@Godzilla2k69]

Nice demos (1-4). From the two generator's perspective is there an increase in reactive power (VARs) going from the leading to the lagging ?

[@dronai]

The ights blinking speed is determined by the frequency yes ?

[@johncochran8497]

The blinking speed is determined by the difference in the frequency between the 2 generators.

[@badatpseudoscience]

So I have a question about synchronization across the grid. You have a number of powerplants that are synchronized buy pushing current onto the grid. If there is not a common reference other then grid voltage, it looks like the grid frequency would be drifting. That's not to mention oscillations between power plants, sudden changes in the load, etc. Is there a central controller for each grid that has the ability to fine tune the load between plants?

[@diogoafonso6993]

Search: "Automatic Genetation Control".

[@Impedancenetwork]

You done a good job here.

[@rfengr00]

Wow, fascinating and excellent series of videos. When maintaining synch in a hydro generator, is the generator shaft phase compared to the grid phase, then that difference used to servo the water flow gates?

[@richardphillips2405]

I enjoyed watching all four videos. I was wondering what would happen if you combined the two generators together and the motors powering the generators did not have the same power output. In other words, the generators would be synced, but one motor was more powerful than the other. This would simulate two power generating stations where one generating station produced more power than the other, both supplying power to the same load. An example would be base power generators and peak power generators connected to the same power grid. Say, in a real life situation, you have one generating running and the load demands more power (current?) than the generator can produce. Then you add the second generator to the grid. But, the second generator is not as powerful as the first generator. However, the second generator can supply the extra power (current?) needed for the load. What would happen? How would current flow in the system? Thank you for making these videos.

[@PatrickKQ4HBD]

This is EXACTLY what I want to know! When I was in the Army, we had a pair of generators mounted on one trailer. One had twice the capacity of the other, so they were in a 1/3 - 2/3 ratio. We would service one while the other carried the bare minimum base load, then start it up, sync them with a mysterious sync box that had a neon sync lamp in the panel, and then shut down the other one for servicing. At least one of them was running 24/7 for an entire year! That was a lot of fuel, but we had reliable power. I never understood until now how that magic box worked. I can see having something like a 1,000W lithium + solar system providing baseload to a camper, then syncing a 2,000 - 3,000W gas generator for when you had heavier short-term loads.

[@markanthony69]

After viewing your series I have hopes to solve my problem. Could you help? I need to sync 2 120V solar inverters for a 240V split phase air conditioner. Could you help or guide me. Thank you.

[@arjovenzia]

As far as I understand: Solar inverters cause some problems in a grid, as they dont have a rotating mass, there is no inertia, which is what enables the 2 motor/generators to come to an agreement of whose motoring and whose generating. I cant think of an easy way to add (like batteries) ac voltages un synchronized. Totally possible if their on the same shaft, they're physically in sync, can series or parallel windings all day. Roll any voltage you have windings for. Id think you'd want to parallell your 110v, as your 'grid', n then use a stepup transformer to get your 220v. I only have experience with 240v systems, but where 110 is common, perhaps autotransformers of adequate size are a thing? It'll be big tho. I was actually having this conversation at work today, very large isolation transformers. A ghetto solution would be a few stick welder transformers. We were talking 2 back to back. But a 110v transformer stick welder bolted to a 220v stick welder might just work. Or 3x 110v units. But that gives you an idea of the size of this beast. Could work... To continue the thought experiment tho, I have seen a lashup job with a 1kw standalone battery backed system that ran as the generator, with a 5kw grid connect inverter attached. With sun, there was 6kw of power, but at night dropped to 1kw off the batteries. Could run washing machine, oven, AC, etc during the day via the grid connect inverter, but at night that circut was disconnected leaving the fridge, lights n tv running off the 1 kw battery system. Very custom and hackish, but appeared to work. They just made lunch the big meal of the day, n had a cold roast sandwich for dinner. Off grid, thats easy enough. Do your washing during the day, n open the Windows at night. Tl;dr, no, i dont think you can series your inverters, unless they are specifically designed to do so. I run 2 solar strings, 2 chargers, 1 battery n 1 big inverter here, but i dont run AC either. The human body can adapt to most temperatures, its better to just acclimatise. You dont need to be 24 degrees every day of the year. The AC is nice to have in a heatwave, run it of a generator if you must. Last year, i think i ran the AC 4 or 5 nights? Priceless when you need it, but is no way a daily need.

[@SubhaEE]

Sir can u name a good book of electrical machine

[@DEKA10101981]

I would like to buy 2 generators about 10 kva.Is there a device that i can byu that can synchronize 2 generator automaticaly?

[@primalitopanaguiton2785]

excellent

[@pmaxgen]

Great video...

[@RadiantFreeEnergyResearch]

Liked and subscribed, Great video's!

[@dronai]

This is very interesting ,thanks

[@jmonster1677]

I understand that you are using these car alternators just for an example but, I wonder if synchronizing alternators in a dual (or 3+) alternator setup in cars would solve the issue of load/power distribution? BTW load distribution is a huge problem in aftermarket multiple alternator setups in cars, often seen in the car audio scene.

[@RobertHancock1]

In normal use in a vehicle, the AC from the alternator is rectified by diodes so the electrical system only sees DC. So this sort of AC synchronization doesn't apply.

[@derina.maleek9408]

thanks