AC arc electrical load model for new power supply analysis

This paper describes a model of an AC arc electrical load for analysis of furnace operating in conjunction with high-speed semiconductor converter. The semiconductor converter is part of electric furnace circuit and generates the current that compensates for the inactive power components caused by electric arc load. A dynamic model of the electric arc is developed taking into account random factors. This is necessary to ensure that the converter control system is adjusted to the rapidly changing electrical parameters. This solution allows to reduce the negative load impact on the supply network, as well as increase the useful power and the furnace productivity.