Control of DC Microgrid based flexible cold-rolling steel mill Plant – an application of grid supporting rectifier

The paper presents DC microgrid based plant topology for the flexible cold-rolling mill plant, which is connected to the grid via a grid supporting rectifier. The proposed plant topology improves overall energy efficiency and provides support to the grid to maintain grid frequency and voltage within acceptable tolerance around their nominal values. Simulation model of the proposed plant and its control is developed. The grid supporting functionalities are demonstrated using simulations. Simulations are caried out using realistic load profiles, which are designed based on the data from a real manufacturing plant.