Overview
Freestone Substation is an operational electrical substation in Arizona, United States, owned and operated by Salt River Project. It operates at a voltage of 69 kV, serving the local grid.
Freestone Substation is an operational electrical substation located in Arizona, United States. Owned and operated by Salt River Project, it is a key component of the regional electrical infrastructure, stepping down transmission-level power for distribution to residential and commercial customers. The substation operates at a voltage of 69 kV, which is a common sub-transmission level in the United States. As part of the Salt River Project system, it falls under the regulatory oversight of the Federal Energy Regulatory Commission (FERC) and adheres to North American Electric Reliability Corporation (NERC) reliability standards. The facility is equipped with modern switchgear and automation systems compliant with ISO/IEC 61850 standards for substation communication. Located in a growing region of Arizona, Freestone Substation plays a critical role in maintaining grid stability and supporting local economic development. Its strategic position within the Salt River Project network ensures reliable power supply to surrounding communities, contributing to the area's energy resilience and infrastructure capacity.
Environmental context
The substation is situated in an arid desert environment typical of central Arizona, where high summer temperatures and low precipitation place significant demands on the electrical grid for air conditioning. The facility's design includes measures to mitigate heat-related stress on equipment, such as cooling systems and fire-resistant materials. Its location in a rapidly urbanizing area requires careful integration with local land use and wildlife corridors to minimize ecological disruption.
Frequently asked questions
Freestone Substation is located in Arizona, United States, at coordinates 33.291537, -111.763647. It is owned and operated by Salt River Project.
Freestone Substation operates at a voltage of 69 kV, which is a common sub-transmission level used for distributing power from high-voltage transmission lines to local distribution networks.
Freestone Substation is owned and operated by Salt River Project, a major utility provider in Arizona that supplies water and electricity to the Phoenix metropolitan area.
As part of the U.S. electrical grid, Freestone Substation must comply with NERC reliability standards and FERC regulations. It also follows ISO/IEC 61850 standards for substation automation and communication.
A 69 kV substation like Freestone steps down high-voltage transmission power (typically 115 kV or higher) to lower voltages for distribution to homes and businesses. It also provides switching and protection functions to maintain grid stability.