Overview
Necaise Substation is an operational electrical substation in Mississippi, United States, owned and operated by Coast Electric Power Association. It operates at a voltage of 115 kV, serving the local grid.
Necaise Substation is an operational electrical substation located in Mississippi, United States. Owned and operated by Coast Electric Power Association, the facility plays a key role in the regional power distribution network. With a voltage level of 115 kV, it is classified as a medium-voltage substation, typical for distributing electricity from transmission lines to local distribution systems. The substation operates under the regulatory framework of the North American Electric Reliability Corporation (NERC) and the Federal Energy Regulatory Commission (FERC), which set reliability standards for the bulk power system. As part of the U.S. grid, it adheres to NERC's Critical Infrastructure Protection (CIP) standards to ensure cybersecurity and physical security. The 115 kV voltage level is common for sub-transmission and distribution substations, connecting higher-voltage transmission lines to lower-voltage distribution networks. Necaise Substation serves the electrical needs of the surrounding community in southern Mississippi, an area prone to hurricanes and severe weather. Its role in maintaining grid stability and reliability is critical, especially during extreme weather events. The facility's operational status and connection to Coast Electric Power Association's network support residential, commercial, and industrial customers in the region.
Environmental context
The substation is located in a rural area of Mississippi, characterized by pine forests and agricultural land. The region experiences a humid subtropical climate with hot summers and mild winters, and is susceptible to hurricanes and tropical storms. The facility's design likely includes measures to withstand high winds and flooding, common environmental risks for electrical infrastructure in the Gulf Coast region. The surrounding ecosystem includes wetlands and waterways that may be sensitive to potential transformer oil spills or electromagnetic field effects, though standard mitigation practices are typically employed.
Frequently asked questions
Necaise Substation is located in Mississippi, United States, at coordinates 30.593466, -89.412319. It is operated by Coast Electric Power Association.
Necaise Substation operates at a voltage of 115 kV, which is a common medium-voltage level for sub-transmission and distribution substations in the United States.
Necaise Substation is owned and operated by Coast Electric Power Association, a member-owned electric cooperative serving parts of Mississippi.
As part of the U.S. bulk power system, Necaise Substation must comply with NERC reliability standards and FERC regulations. These include requirements for grid reliability, cybersecurity, and physical security under NERC CIP standards.
A 115 kV substation typically steps down voltage from higher transmission lines (e.g., 230 kV or 500 kV) to lower distribution voltages (e.g., 34.5 kV or 12.47 kV) for local delivery. It also provides switching and protection functions to maintain grid stability.