Annandale Substation - High-Voltage Electrical Substation in the United States

Annandale Substation is an operational electrical substation located in the United States, with coordinates 38.823386, -77.169237. The facility operates at a voltage of 230 kV, classifying it as a high-voltage substation critical for transmission-level power distribution and grid stability. As a substation operating within the United States, Annandale Substation is subject to regulatory oversight by the Federal Energy Regulatory Commission (FERC) and must comply with North American Electric Reliability Corporation (NERC) reliability standards. The 230 kV voltage level indicates this facility is part of the bulk electric system, requiring adherence to strict operational and cybersecurity protocols. The substation's location in a suburban area near Washington, D.C., underscores its importance in serving a densely populated region with high electricity demand. Its operational status ensures continued support for local grid resilience and power delivery to residential, commercial, and industrial customers.

The substation is situated in a suburban environment, where electrical infrastructure must balance reliability with land use constraints. High-voltage substations like this one are typically designed with oil containment and fire suppression systems to mitigate environmental risks. The surrounding area's mixed residential and commercial development necessitates careful management of electromagnetic fields and noise, though modern substations are engineered to minimize such impacts.