Manage reverse power flow and fault current level in lv network with high penetration of small scale solar and wind power generation

K N Bangash, M E A Farrag, A H Osman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Abstract

High penetration level of rooftop small-scale
renewable energy generation (REG) such as solar and wind
power into the existing low voltage (LV) network would cause the
flow of power in reverse direction. This would also vary the level
of short-circuit current required for relays to operate. Relay
settings would be required to properly detect the unpredictable
fault current and isolate the faulty section. This paper
investigates the impact of residential distributed generation (DG)
penetration level on the typical UK low voltage network
protection system. Studies were commenced to properly charge
and discharge the home connected energy storage battery (ESB).
ESB is used as a remedial measure to confine the flow of reverse
power due to rooftop DGs. Penetration level DGs are modeled
based on proper ESB charging and discharging states in daily
load cycle. Short circuit analysis is simulated on
Matlab/Simulink. The power flow from the transformer
secondary is managed to avoid malfunctioning of relays
according to daily load cycle. Short circuit analysis results are
compared with the UK passive network to investigate the impact
of the DG on the short circuit currents at distribution
transformer.
Original languageEnglish
Title of host publication2018 53rd International Universities Power Engineering Conference (UPEC)
PublisherIEEE
Number of pages6
ISBN (Print)9781538629109
DOIs
Publication statusPublished - 13 Dec 2018

Keywords

  • batteries
  • fault currents
  • circuit faults
  • relays
  • load flow
  • fuses
  • production

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