Graphine Mine Substation - 138 kV Electrical Substation in Texas, United States

Graphine Mine Substation is an operational electrical substation located in Texas, United States. Owned by Pedernales Electric Cooperative, the facility operates at a voltage of 138 kV, placing it in the medium-to-high voltage range typical for distribution and sub-transmission substations. The substation plays a key role in the local electrical infrastructure, serving the Pedernales Electric Cooperative service area. As a substation under the jurisdiction of the United States, the facility adheres to NERC reliability standards and FERC regulations for transmission-level assets. The 138 kV voltage level is commonly used for regional power distribution, connecting bulk transmission systems to local distribution networks. The substation likely includes switchgear and transformers to step down voltage for end users. The environmental context of Graphine Mine Substation is shaped by its location in central Texas, a region with a mix of rural and suburban development. The area experiences hot summers and mild winters, with occasional severe weather events such as thunderstorms and winter storms that can impact grid reliability. The substation's role in maintaining stable power supply is critical for local communities and industries.

Located in central Texas, the substation operates in a region with a semi-arid climate, characterized by hot summers and variable precipitation. The area is prone to drought and occasional wildfires, which can affect overhead transmission lines. The substation's design likely incorporates measures to withstand extreme weather, such as high winds and ice storms, ensuring grid resilience.