Voltage Sag Ride-Through in a Joint Installation of a Hot Rolling Mill Plant and a Wind Farm

Present energy and environmental scenarios promote the incorporation of generation systems based on renewable sources into the distribution grids of electro-intensive industries, the benefits of which transcend the local generation of energy with minimal greenhouse gas emissions. In this regard, coordinated management of reactive power in a joint installation of a hot rolling mill plant and a wind farm can improve the immunity of both facilities against voltage sags. In this paper, the various factors influencing the response of the joint installation against voltage sags are analyzed. In this regard, special attention is paid to the wind farm location and, consequently, to the topology of the joint installation distribution network. The closer the wind farm and the rolling mill, the more relevant the shared impedances and the more significant the effect of the reactive power supplied by the wind farm. The main variables of interest are analyzed under actual rolling conditions both in normal operation and in the face of voltage sags to determine the most indicated distribution network topology.