This paper presents a methodology to manage cogeneration power injection and protection system adjustments in a steel manufacturing industry. The study begins with an analysis of the feeder, resulting in the scenarios in which the protection system could fail with the inclusion of cogenerators. After this, a series of restrictions are defined, under which the optimization of the power injected in cogeneration and the adjustments of the protections are carried out. Finally, a list of tests on the generated algorithm are presented. These tests are performed on a model of the case study network developed in Matlab/Simulink.