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Analysis of flicker mitigation in a utility distribution network

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2 Author(s)
Blazic, B. ; Fac. of Electr. Eng., Ljubljana Univ., Slovenia ; Papic, I.

A regional utility company in Slovenia reported excessive flicker levels that are caused mainly by a 4 MVA arc furnace installed in the area. This paper evaluates two possible solutions for flicker mitigation: increasing the short-circuit power at the point of common coupling; and installation of a D-StatCom system. Based on the field measurements, a detailed network model was constructed in the PSCAD/EMTDC program to verify the proposed solutions. The arc furnace and an IEC flicker-meter for flicker level evaluations were also modeled. A comprising solution to flicker mitigation was analyzed. The utility could reduce the flicker level from 4 to around 1.9 by replacing its HV/MV transformer. Further reduction of flicker (the permissible level is set to 1) should be done by the customer with the application of a D-StatCom compensation system. The structure and control of the device are proposed in this paper.

Published in:

EUROCON 2003. Computer as a Tool. The IEEE Region 8  (Volume:2 )

Date of Conference:

22-24 Sept. 2003