Round Rock Southeast Substation: Oncor 138 kV Substation in Texas

Round Rock Southeast Substation is an operational electrical substation located in Texas, United States. Owned and operated by Oncor, a major transmission and distribution utility in the state, this facility plays a key role in the regional power grid. The substation operates at a voltage of 138 kV, which is a common transmission-level voltage in the US, indicating its function in stepping down power for local distribution. As part of the US electrical infrastructure, this substation operates under the regulatory framework of the North American Electric Reliability Corporation (NERC) and the Federal Energy Regulatory Commission (FERC). Oncor, as a transmission service provider, must comply with NERC reliability standards to ensure grid stability. The 138 kV voltage level places this substation in the medium-to-high voltage range, typical for sub-transmission or distribution substations serving urban and suburban areas. The substation's location in Round Rock, a growing city in the Austin metropolitan area, underscores its importance in supporting local residential and commercial electricity demand. Its operational status and integration into Oncor's network contribute to the reliability of the regional grid, facilitating power delivery to end-users and supporting economic activity in the area.

Located in a rapidly urbanizing region of Texas, the substation's environmental context involves balancing infrastructure needs with land use and habitat considerations. The facility's 138 kV voltage level and urban setting mean it is subject to standard electromagnetic field (EMF) guidelines and noise regulations. Its operation supports the integration of renewable energy sources, such as wind and solar, which are prevalent in Texas, by providing grid stability and voltage control.