Overview
Green Hill Substation is an operational electrical substation in the United States, owned and operated by Eversource. It operates at a voltage of 115 kV, serving as a key node in the regional grid.
Green Hill Substation is an operational electrical substation located in the United States, owned and operated by Eversource, a major utility in the Northeast. The facility operates at a voltage of 115 kV, classifying it as a medium-voltage substation that plays a critical role in stepping down transmission-level power for distribution to local communities. As part of the U.S. electrical infrastructure, Green Hill Substation operates under the regulatory oversight of the Federal Energy Regulatory Commission (FERC) and adheres to North American Electric Reliability Corporation (NERC) reliability standards. These frameworks ensure grid stability, cybersecurity, and compliance with mandatory reliability requirements. The substation likely employs modern switchgear and automation systems, consistent with industry standards such as ISO/IEC 61850 for substation automation. The substation's location in a region served by Eversource suggests it supports a mix of residential, commercial, and industrial loads. Its operational status indicates it is actively contributing to grid reliability, with potential redundancy and contingency plans in place to maintain power supply during peak demand or emergencies. The facility's role in the local grid underscores its importance to community resilience and economic activity.
Environmental context
The substation is situated in a region with a temperate climate, where seasonal weather patterns can impact grid operations. Its urban or suburban setting likely requires careful management of electromagnetic fields and noise, with mitigation measures such as landscaping or sound barriers. The facility's operation aligns with environmental regulations, including those related to SF6 gas management in switchgear, and contributes to the overall efficiency of the electrical grid by reducing transmission losses through voltage transformation.
Frequently asked questions
Green Hill Substation is located in the United States, with coordinates approximately 41.3195° N, -72.5961° W. It is owned and operated by Eversource, a major utility in the Northeast.
Green Hill Substation operates at a voltage of 115 kV, which is a common medium-voltage level for substations that distribute power from transmission lines to local distribution networks.
Green Hill Substation is owned and operated by Eversource, a utility company serving customers in Connecticut, Massachusetts, and New Hampshire.
Substations in the United States must comply with NERC reliability standards for grid stability and FERC regulations for transmission-level assets. Additionally, facilities often follow ISO/IEC 61850 for substation automation.
A 115 kV substation steps down high-voltage transmission power to lower voltages for distribution to homes and businesses. It also provides switching and protection functions to maintain grid reliability.