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Storage can defer investment in a distribution network by

  • A.improving the power factor of the connected load
  • B.reducing the fault level at the point of connection
  • C.meeting the peak that would otherwise need a larger circuit
  • D.reducing the total energy the circuit carries in a year

Answer: C

Correct answer: meeting the peak that would otherwise need a larger circuit

Distribution equipment is sized for the maximum demand it must carry, and that maximum may occur for only a few hours a year. A store placed downstream can supply the excess during those hours, so the circuit never sees the peak and the reinforcement is postponed - sometimes for many years. The annual energy through the circuit is barely changed; it is the peak that is the constraint.

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