3 ms·

I’m confused. Is it 90% savings vs regular power (awesome) or 90% vs “emergency” power (ok)?

• ggm 8y ago
  It's 90% cheaper bids into a frequency stability service. It corrects for drift from 50hz. It doesn't supply power in that sense, it supplies a slightly out of phase AC to refocus the frequency back to where it should be. It does it inside milliseconds of a drift and prevents overreaction by other generators with synchronous power, and can do it more often for less "cost" (synchronous flywheel systems lose most of their power reserve reacting, and have to be recharged over a longer and more costly period. A battery is really ideal for this frequency adjustment service)
  • agumonkey 8y ago
    So tesla power station acts like a nationwide super cap ?
  • tripletao 8y ago
    In what sense doesn't it supply power? If demand for power exceeds supply, then the frequency starts to go down. "Maintaining frequency" and "supplying the demanded power" are two different expressions of the same problem.
    • goodcanadian 8y ago
      If the frequency goes down, the battery supplies power to the grid as you say. If the frequency goes up, the battery absorbs excess power from the grid. On net, it doesn't supply anything.