Modernization of substations electrical in the industry petrochemical in Mexico

This paper present the issues to consider, for the modernization of power systems in the National Refining Industry (NRI) in Mexico, and migration to gas-insulated substations (GIS). The NRI, increases its production capacity and demand of electric charge, requiring electrical supplies and equipment to provide higher availability, reliability and security of supply of electricity. The selection of new technologies, should present an improvement in efficiency, preserve operational security and integral of the plants and solve the problems in the power systems of the NRI. Between the new requirements posed, is the migration of the distribution level of 13.8 kV to 34.5 kV or 115 kV, and the use of GIS´s and hybrid substations. The GIS´s technology represents a major technological advance for repowering and modernization of power substations used in the NRI, due to innovative features, high quality of teams and reliability which represents SF6 as insulating medium. Also this paper shows the conceptual schemes proposed to restructure the electrical power system for the refineries by 2015. The results of the analysis allowed to identify the current conditions in the NRI, and thereby to offer technical solutions that could be useful to engineers facing similar projects.