How exactly does grid-tied hybrid inverter detect loss of grid?

[hwy17]

That seems beg the question, how much wiggling can the grid take as more and more residential solar wigglers are added? Do solar farms wiggle?
Us non-wigglers want to know.

A high DERS grid will probably need synchronous condensers and those will provide stability.

Synchronous condenser - Wikipedia

en.wikipedia.org

Kauai, one of the only true high DERS islanded grids, has converted their oil turbine to be able to freewheel in condenser mode. The UK is deploying standalone condensers as well.

 

[Hedges]

A million wiggling at random adds up to no wiggle at all.
"Break Step, Everyone!"

https://www.warhistoryonline.com/war-articles/broughton-suspension-bridge-collapse.html

 

[SeaGal]

So the next question is 'how'? what component is actually doing this - presumably a MOSFET or IGBT?

Just relays.

Ah! I meant how does it try and change the frequency and monitor the resistance to doing that I may have studied electronics a long time ago, but I know that can't be done with a relay

 

[Hedges]

Same way sine wave current is driven, PWM of SMPS to vary current so proportional to voltage. Anti-islanding can include sending "wrong" amount of current and noting grid impedance, how much voltage response. Maybe analyzing it in frequency not just time domain (lead/lag of capacitive/inductive load.)

https://files.sma.de/downloads/WhitePaper_FFi_Antiislanding_EU-Geraete_E.pdf

Well, relays can create frequencies. By chattering and arcing.

 

[HighDesertOffgrid]

A million wiggling at random adds up to no wiggle at all.
"Break Step, Everyone!"

https://www.warhistoryonline.com/war-articles/broughton-suspension-bridge-collapse.html

I am consoled. I had more of a Galloping Gerdie scenario in mind.

 

[Hedges]

But do electrons experience Aerodynamic Flutter?

Aeroelasticity - Wikipedia

en.wikipedia.org

Or are they perhaps more like Starlings?

e-beam and ion equipment suffers from "Space Charge Effects", making it difficult for a cyclotron etc. to maintain stability a high charge density.

 

[MajicDiver]

I am consoled. I had more of a Galloping Gerdie scenario in mind.

In the grid world, when a particular Gerdie gallops too much the dispatcher orders it disconnected from the grid and someone has to console it until it is calm enough to get back on the track.

 

[peufeu]

Ah! I meant how does it try and change the frequency and monitor the resistance to doing that I may have studied electronics a long time ago, but I know that can't be done with a relay

Ah, well, no idea
The inverter uses IGBTs, but besides that, there's a big DSP loaded with mysterious firmware...

 

[SeaGal]

Ah, well, no idea
The inverter uses IGBTs, but besides that, there's a big DSP loaded with mysterious firmware...

or maybe the secret fans in the Solis fanless-design push the electrons around in the inverter?