Flicker summation factor in the slovenian transmission network

Voltage fluctuations in transmission networks caused by operation of large consumers, such as electric arc furnaces, are often primary sources of high flicker levels at end-users in low-voltage networks. This is the case in the Slovenian transmission network, where three arc furnaces cause high flicker levels throughout the network and several network nodes are influenced by two or even all three furnaces. This article presents the results of calculation of flicker propagation and optimal flicker summation coefficients for different nodes in the network. The calculations are based on comparison of measured and simulated flicker levels for several chosen intervals.