Stateline Substation: 138 kV Electrical Substation Operated by NIPSCO

Stateline Substation is an operational electrical substation located in the United States, owned and operated by NIPSCO (Northern Indiana Public Service Company). The facility operates at a voltage level of 138 kV, classifying it as a medium-to-high voltage substation critical for regional power transmission and distribution. Its location near the Indiana-Illinois border supports grid connectivity between states. As a 138 kV substation, Stateline operates under the regulatory framework of the North American Electric Reliability Corporation (NERC) and the Federal Energy Regulatory Commission (FERC), which enforce reliability standards for bulk power systems. The substation likely employs modern switchgear and automation systems compliant with ISO/IEC 61850 standards to ensure efficient and safe operation. NIPSCO, a major utility in the Midwest, integrates this facility into its broader transmission network serving industrial, commercial, and residential customers. The substation's operational significance lies in its role as a node in the regional grid, facilitating voltage regulation and power flow management. It supports the reliability of electricity supply to surrounding communities and industries, contributing to the stability of the Midwest power system. Its proximity to urban and industrial areas underscores its importance in meeting local energy demands.

The substation is situated in an area with a mix of urban and industrial development near the Indiana-Illinois border. Its operation involves electromagnetic fields and potential impacts on local wildlife, though modern substations are designed to minimize ecological disruption. The facility's location in a temperate climate zone requires robust insulation and cooling systems to handle seasonal temperature variations, ensuring continuous grid stability.