Grid Control

Grid control is required in order to manage the injection of power into an overloaded, fluctuating or unbalanced grid. There can be any number of causes for this but with renewables often being weather dependent and limitations within the grid infrastructure itself to transport power, Grid Control is becoming a high priority amongst grid and network operators.

Grid Control, injection of power, overloaded, fluctuating, unbalanced, grid,
Grid Control, injection of power, overloaded, fluctuating, unbalanced, grid,

Grid Control - Why?

Distributed bulk power systems feed into an electricity grid which originally was designed for centralized, top-down electricity distribution and supply.


This causes

  • Fluctuating load profiles (day, night)
  • Fluctuating energy injection by “Renewables” due to variable weather conditions
  • Irregular energy injection and energy extraction in sub-grids
  • Limited energy transport  capacities of  “historic” transmission and distribution grids
  • Limited capabilities of conventional power plants to balance out those fluctuations
  • Grid faults -  sudden load shedding and short circuits

 

Solutions

Grid security management measures

  • On-demand reduction of energy injection in the event of grid overload

Decentralized grid stability measures

  • Voltage support
  • Injection of reactive power (cos ø)
  • Frequency stability monitoring
  • Fault ride through
  • Provision of short circuit current (LVFRT)