Suppression and Measurement of Arc Furnace Flicker with a Large Static Var Compensator

This paper describes the system outline, the features of component equipments and the operating results of 120 MVA Static VAR Compensator (SVC). The SVC was installed for suppressing flicker caused by two 100 ton arc furnaces and has been in operation since April of 1978. In addition, an exclusive monitor panel was installed to monitor the flicker, harmonic currents and other components at critical bus. Special emphasis is placed on the analysis of flicker compensating effect with new measuring method, 33 kV thyristor switch hardware and outline of the monitor panel.