Walzem Road Substation - 138 kV Electrical Substation in San Antonio, Texas

Walzem Road Substation is an operational electrical substation located in San Antonio, Texas, United States. Owned and operated by CPS Energy, the facility plays a key role in the regional power distribution network. The substation operates at a voltage of 138 kV, which is typical for sub-transmission and distribution-level infrastructure in the United States. As part of CPS Energy's grid, the substation is subject to North American Electric Reliability Corporation (NERC) reliability standards and Federal Energy Regulatory Commission (FERC) regulations for transmission-level assets. The 138 kV voltage class is commonly used for distributing power from larger transmission lines to local distribution networks, supporting urban and suburban load centers. The substation's location in San Antonio places it within a growing metropolitan area with increasing electricity demand. Its operational status ensures continued reliability for residential, commercial, and industrial customers. The facility contributes to grid stability and energy delivery in the region.

The substation is situated in an urban area of San Antonio, Texas, where land use is predominantly residential and commercial. The local environment is characterized by a semi-arid climate with hot summers and mild winters. Substations of this type typically have minimal direct environmental impact, though they are critical for integrating renewable energy sources and managing grid reliability in response to weather-related demand fluctuations.