3 ms·
The cost and inefficiency of DC conversion for the power-generation part is why new turbines use DFIGs[1]. Essentially it allows keeping chosen frequency despit
by p_l 2y ago
The cost and inefficiency of DC conversion for the power-generation part is why new turbines use DFIGs[1]. Essentially it allows keeping chosen frequency despite changes in turbine power, and is core to tricks like I described.
[1] https://en.wikipedia.org/wiki/Doubly_fed_electric_machine#Doubly_fed_induction_generator https://en.wikipedia.org/wiki/Doubly_fed_electric_machine#Do...
- vel0city 2y agoThat seems pretty cool. Good to hear they're rolling out newer tech to solve that DC conversion and have turbines help support frequency. Thanks for sharing! I wonder what percentage of turbines installed already have this technology versus the DC conversion. Or are pretty much all MW scale turbines using this?
- p_l 2y agoApparently they are quite common, but permanent magnet synchronous motors with double inverters are apparently increasingly common, though even there I've heard of similar tricks with polyphase winding as well as electronically "feeding in" power onto each phase to achieve whichever goals plant control wants.
- vel0city 2y agoNeat, time for me to do a good bit more reading it seems. I appreciate the insights you brought. As an aside, I find it funny so much of our power grid can have so many complicated parts but often boils down to boils down to "big thing spin fast!"
- p_l 2y agoPersonally the funniest to me is UK's Supergrid dispatch centers watching BBC to synchronize extra power capacity with ending credits of various popular shows. Because otherwise the millions of 2kW electric kettles result in turbines visibly slowing and grid failure :D