Control of The National Grid - Voltage Control

Voltage Control

There are a number of ways that voltage control is undertaken on the National Grid 400, 275, 132 kV system. This can be done by:

  • Over/under excitation of generators
  • Switching in/out of shunt reactors
  • Switching out of overhead line and underground cable circuits
  • Tap staggering of both supergrid and grid transformers
  • Under/over excitation of synchronous compensators
  • Declutching open cycle gas-turbines into the synchronous compensation mode
  • Static variable compensators
  • Manually switched capacitor banks
  • Synchronous compensation of generators
  • OLTC of generator step up transformer

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