POWER QUALITY ASSESSMENT AND MITIGATION AT WALYA-STEEL INDUSTRIES AND ETHIO-PLASTIC SHARE COMPANY

Abstract

In this paper, electric power quality (PQ) in Walya-
Steel Industries PLC (WSIPLC) and Ethio-Plastic
Share Company (EPSC), which are customers of
Ethiopian Electric Power Corporation (EEPCo), are
studied. PQ indicators of the two industries are
recorded and analyzed. The study demonstrated that
harmonic distortion is high relative to the
corresponding IEEE recommended maximum
permissible values while power factor of the two
factories’ power systems are low. Other PQ
indicators are within the range of allowable values.
The simulation done on the modeled power system of
the two factories demonstrates that major source of
harmonic distortion is power electronic converters,
which are in use in both factories. Based on the
simulation results, capacitive filter for the harmonic
distortion and low power factor mitigation have been
designed