Flickers — Cause, impact on the environmental and mitigation

This paper describes the routine activities to the customer power quality reclamations in flickering appearance of incandescent light bulbs with during the long period of time, where the appearance coincided with new customer connecting to the consumption areas - Electrodistribution Sremska Mitrovica, which covers the territory of two municipalities, Sremska Mitrovica and Šid, at about 1449 km2 and with about 125,000 inhabitants. The customer, EAF plant, installed capacity of 50 MW, is the direct cause of interference - flickers. The paper describes the cause and place of origin effects, extent and impact of flicker phenomena, are described of measurements, the results of measurements and the standards in this area, given the proposal to overcome the problem. The measurements were performed at voltage levels 110 kV, 20 kV and 0.4 kV in wide area. Measured the impact and extent of flicker by voltage levels from 110 to 0.4 kV and the geographical territory, in different locations and consumption of substations 110 / x kV in the near vicinity, with about of 44,500 customers. By analysing the measured results, during two years almost, and comparison with national and international standards we find the impact level of flickering expressed on a wide area, the region where the customer, STATCOM installation is suggested.