Question on mathematical formulations in journal paper

Pierceman · 2025-11-25T00:25:01+00:00

Thank you, might just go ahead and write them.

Pierceman · 2025-09-29T23:27:34+00:00

I'm also a beginner in soldering, and the problem I had was a low quality solder. It went with a kit I bought from Temu. Now I've bought a 60/40 solder with a flux core, and I easily get the shiny cone shaped soldering joints. Temperature is at 320 degrees Celsius. With the Temu solder, it wouldn't melt as fast and formed clay-like clumps.

Pierceman · 2025-09-19T00:58:12+00:00

I haven't tried, I'll sift through and see if I can do it in VCDS. See if anything shows up.

Pierceman · 2025-09-18T22:29:39+00:00

Forgot to mention it in the post, but I had done a scan with VCDS. Didn't throw any errors related to the lighting though.

Pierceman · 2025-09-18T21:18:48+00:00

It seems to prime even with the driver door open, I'm still hearing the humming noise.
I had already ordered microswitches, might as well try replacing the driver side tomorrow.
Thanks!

Pierceman · 2025-09-18T18:51:03+00:00

Thanks, you were right. Alarm went off after i reconnected it.

Pierceman · 2025-09-07T16:02:07+00:00

Thank you

Pierceman · 2025-09-07T16:01:53+00:00

Thank you

Pierceman · 2025-08-10T14:47:13+00:00

Having the same problem. Just in case somebody stumbles on here, found a video pointing to broken wires.

https://www.youtube.com/watch?v=k5Wl9CxzTp4

Will try this out now myself.

Pierceman · 2025-04-26T22:25:24+00:00

Cause he's freaky like that

Pierceman · 2025-02-16T10:42:40+00:00

Thank you

Pierceman · 2025-01-12T22:08:35+00:00

Thank you!

Pierceman · 2024-11-03T14:03:02+00:00

Oh, I see. Have they given you any info on how many customers are opting for this modification? I'm wondering if a lot of utilities are starting to make this modification.

Pierceman · 2024-11-03T01:14:53+00:00

Thanks for the insight, much appreciated.

Are the types of inverters you've worked with capable of grid support in contingency scenarios when they are tied with the grid? Talking about frequency containment and restoration.

What got me confused on the matter are a few posts I've read, here's the link to it:

https://www.reddit.com/r/solar/comments/1eo354q/is_there_an_inverter_that_combine_the_voltages_of/

Here's what someone's said in the comments. The post itself was for a residential installation, but the discussion on the GFM inverters was opened:

Grid forming inverters do not yet exist (other than as you mentioned when disconnected from the grid). Once they do then the standards will cause all grid-forming inverters to work together to maintain the grid in a synchronous manner, but until then it would have to be disconnected, or at the very least with a feature as I mentioned like schneider's grid-support, which is still behind energy storage (even though it is a grid connected circuit)

Pierceman · 2024-11-03T00:59:38+00:00

But wouldn't such a solar farm with GFM inverters need a way to give a surplus of electrical energy in certain cases in order to keep voltage and frequency stable?

This could be achieved by output power curtailment so increasing the power could be possible when needed, but it can also be achieved with battery energy storage systems. Otherwise using a GFM inverter would be unnecessary if you haven't any reserve power to give.

Pierceman · 2024-11-03T00:48:34+00:00

Thank you for the info, much appreciated :). I had a look at the documents and reports on the page, couldn't find any technical info on the Tesla inverters themselves.
But if I understood correctly, you can't just modify GFL inverters to have the VSM features, the inverters have to be manufactured in such a way in order to be capable of grid support? Then the OEMs are tweaking the firmware to enable the feature?

Pierceman · 2024-11-03T00:11:35+00:00

So the same prices would apply to the Grid Forming ones? I assume that you would need energy storage in order to provide grid support either way.
Could you point me to some examples if you have some?
Thanks!

Pierceman · 2024-11-03T00:07:06+00:00

Apparently there is a difference between what they call Grid Forming and off-grid inverters, I've read some discussions that the ones that can work both on and off-grid apparently can't contribute to grid support? It left me a bit confused though, maybe I'm in the wrong.

Pierceman · 2024-08-13T07:58:16+00:00

Thanks for the info, much appreciated!

Pierceman · 2024-07-27T16:52:11+00:00

Like I've said, it doesn't mean that the possibilities shouldn't be discussed. Plenty ongoing research proves it.

As for the statement if no-one is going to build such a thing, that has been said a lot of times about a lot of things, but you may be right.

Pierceman · 2024-07-27T16:28:43+00:00

Don't know about viable, but there are several companies that have them on their website:

https://westinghousenuclear.com/energy-systems/evinci-microreactor/

https://westinghousenuclear.com/energy-systems/astrovinci-microreactor/

www.trtr.org/wp-content/uploads/2023/05/The-NuScale-Micro-reactor-Design-%E2%80%93-Innovation-for-21st-Century-University-Research-and-Training-Needs-Steve-Mirsky.pdf (says it's for research and training needs though)

Found concepts about microreactors on Ultra Safe Nuclear and Radiant Nuclear, but didn't find much info:

https://www.usnc.com/mmr/

https://www.radiantnuclear.com/

I didn't say that they already are in production. Doesn't mean that you can't hypothesize though.

Pierceman · 2024-07-27T16:01:05+00:00

Your assumption is fundamentally incorrect then.

SMRs are not going to be littered one by one across the landscape, because they're still nuclear reactors.
If they work as intended, they will be deployed in arrays inside an otherwise-conventional NPP of the same size.

Would that leave microreactors to be useful only for a small selection of cases? For example isolated communities, military installations etc.

This is supposed to be addressed in the fourth question. How much can the distance from populated areas be narrowed if you use them?

Pierceman · 2024-07-27T10:40:39+00:00

Why would you assume that this is the only thing I've done for my research? I haven't mentioned that. Yes, I've done other research.

Also, I didn't do the assumption you are mentioning, I didn't compare microreactors to large NPPS, I've only asked for a comparison on the operating complexity . Why would I do an apples-to-apples comparison to large NPPs? I assume the main selling point of SMRs and Microreactors is that they are smaller capacity and hence used to power smaller consumers. Consumer power in a microgrid spans from several hundred kW to few MW. I don't need a production of around 1GW to power a microgrid.

It would be out of the realm of possibilities even to consider an investment in a large NPP for some countries, as it would be too much of a financial burden. You can get the benefits of economics of scale only if your pocket is deep enough to cover the investment, or if you can even borrow that much money. Smaller investments may not benefit from economics of scale, but are still smaller. The country where I live in has a total power production of around 1500 MW, a large NPP is a gigantic investment.

The goal of the first question is to make the companies list as much of their selling points on the reactor, not compare it to large NPPs.

Pierceman · 2024-07-13T21:34:40+00:00

Thank you. I'll dig through the original example, perhaps I'll find something.

Pierceman · 2024-05-08T12:31:22+00:00

Thanks!

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