Heavy Industries

Isolated Power Grids in Marine and Oil & Gas Industries

Customer challenges

Isolated power grids are typically weak and commonly found in marine, oil & gas and mining applications.  Large and dynamic loads on isolated power grids with low fault level cause numerous power quality issues, including higher harmonic distortion, flicker, rapid voltage variation and poor power factor. Such power quality problems lead to frequent breakdowns of sensitive electronic equipment, energy losses and even costly blackouts. To increase the short-circuit level, conventional solutions, such as running additional gensets, require additional investments and higher recurring costs in terms of fuel and engine maintenance. Also, conventional solutions do not reduce high harmonic distortion produced by non-linear loads on isolated grids.



  • Marine vessels
  • Offshore and onshore oil drilling rigs
  • Oil & gas pumping stations
  • Refineries
  • Other large and dynamic loads on isolated power grids

Customer benefits

The key benefits of improving power quality in isolated power grids include:

  • Fewer diesel gensets and more effective short-circuit capacity
  • Fuel savings and reduced operational costs
  • High process reliability and low operating costs
  • Extended lifetime of electrical equipment in the plant
  • Compliance with IEEE-519, G5/4, IEC61000 3-2, 3-4 and other power quality standards and recommendations

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