On the use of unbalance definition to control compensators for arc furnaces

The use of the new unbalance definition introduced by some of the authors in a previous paper is considered for the compensation of Light Flicker in networks where there is the presence of large arc furnaces. Some recalls on compensation strategies for arc furnaces are firstly given. Then, the new unbalance definition is briefly recalled in its original formulation in frequency domain and extended the time domain in order to use it in a control system for active compensation of harmonics and interharmonics. A preliminary correlation analysis finalized to find the best quantity to calculate the reference values for the active filter is performed. A numerical case-study and experimental data obtained during a measurement campaign performed by some of the authors are used to show preliminary results of Light Flicker compensation.