EUROPEAN STEEL TECHNOLOGY AND APPLICATION DAYS 2017 - ESTAD 2017

Abstract A steel making factory with a DC EAF and LF requires a reliable and stable supply system to allow the correct and efficient operation of the overall plant. Not always these conditions can be fully guaranteed giving rise to the need of more flexible operating modes for the steel making factory, foreseeing the operation in different configurations: synchronous mode with the main public network, synchronous mode with the main public network plus local generation, islanding mode only with local generation. The paper describes the analysis performed to verify feasibility of the operation, which provisions are required to be adopted and the main consequences on the rating characteristics of the equipment. Keywords Steel making factory, islanding operation, STATCOM, DC Electric Arc Furnace, Ladle Furnace, gas turbines, technical specification, power system studies, dirty and clean bus-bar.