Problems Involving Industrial Plant-Utility Power System Interties

One of the most important considerations in the development of the overall protection scheme in an industrial plant is the special relaying requirements of the industrial plant-utility power system intertie. The proposed revision to IEEE Red Book Chapter III includes a description of typical intertie relaying practices for industrial plants both with and without in-plant generation. The application of this relaying will be reviewed and several problem areas that must be recognized and dealt with for satisfactory system performance will be discussed.