Overview
Letterkenny Substation is an operational electrical substation in Pennsylvania, United States, owned and operated by Alleghany Energy. It operates at a voltage of 138 kV, serving as a key node in the regional transmission grid.
Letterkenny Substation is an operational electrical substation located in Pennsylvania, United States. Owned and operated by Alleghany Energy, the facility operates at a voltage of 138 kV, placing it within the sub-transmission or distribution voltage range typical for regional power distribution. The substation operates under the regulatory framework of the United States, which includes reliability standards set by the North American Electric Reliability Corporation (NERC) and oversight by the Federal Energy Regulatory Commission (FERC) for transmission-level assets. As a 138 kV facility, it likely serves as a distribution substation stepping down power from higher voltage transmission lines to serve local industrial, commercial, or residential loads. Located in rural Pennsylvania, the substation supports grid stability and electricity delivery to the surrounding area. Its operational status and voltage level indicate it plays a role in maintaining reliable power supply within the PJM Interconnection, the regional transmission organization that coordinates the movement of wholesale electricity in all or parts of 13 states and the District of Columbia.
Environmental context
The substation is situated in a rural area of Pennsylvania, where the surrounding landscape includes agricultural land and forested regions. Electrical infrastructure in such settings typically has a lower environmental footprint compared to urban installations, though it may still require vegetation management and wildlife protection measures. The 138 kV voltage level suggests moderate electromagnetic field emissions, which are managed through standard siting and shielding practices.
Frequently asked questions
Letterkenny Substation is located in Pennsylvania, United States, near coordinates 39.985701, -77.632085.
Letterkenny Substation operates at a voltage of 138 kV, which is typical for sub-transmission or distribution substations in the United States.
Letterkenny Substation is owned and operated by Alleghany Energy, a utility company serving parts of the eastern United States.
Substations in the United States must comply with NERC reliability standards for grid stability and FERC regulations for transmission assets. Additionally, facilities may follow IEEE and ISO/IEC 61850 standards for automation and protection.
A 138 kV substation typically steps down voltage from higher transmission lines (e.g., 230 kV or 500 kV) to distribution levels, serving industrial, commercial, and residential customers. It also provides switching and protection functions to maintain grid reliability.