Improve Power Factor : Reduce Operating cost

1000kVA Electrical distribution system : Study case

Electrical Distribution system:

  • Transformer: 22kV/400Vac
  • Power Rated 1000kVA
  • No-load loss 2000W
  • Full-load loss 14,000W
  • Assume load factor 70%
  • Power factor 0.7
  • Distribution panel:
    • 1 x MDB 2000A
    • 4 x LDB 400A

 

Cables:

  • Transformer-MDB : XLPE 185mm2 x 3 cores , length 50 meters
  • MDB-LDB#1 : XLPE 185mm2 x 1 core, length 100 meters
  • MDB-LDB#2 : XLPE 185mm2 x 1 core, length 150 meters
  • MDB-LDB#3 : XLPE 185mm2 x 1 core, length 200 meters
  • MDB-LDB#4 : XLPE 185mm2 x 1 core, length 250 meters

Load profiles:

  • Total Load consumed at MDB : Apparent Power 700kVA, Real Power 490kW
  • Load consumed at each LDBs : Apparent Power 175kVA, Real Power 122.5kW

 

Reduce Waste Energy Reduce Operating cost

ROI table will show Return On Investment is only 8.79 month. Operating life time of Power Factor Correction system is 3-5 years. It is depend on harmonics level.

 

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