Overview
Wahiawa Substation is an operational electrical substation in Hawaii, owned and operated by Hawaiian Electric Company. It handles multiple voltage levels including 138 kV, 46 kV, and 12.47 kV, serving the island of Oahu's grid.
Wahiawa Substation is an electrical substation located in Wahiawa, Hawaii, United States. Owned and operated by Hawaiian Electric Company, the facility is a key node in the island of Oahu's electrical infrastructure, stepping down transmission voltages for local distribution. The substation is operational and handles voltage levels of 138,000 volts (138 kV), 46,000 volts (46 kV), and 12,470 volts (12.47 kV), indicating its role in both high-voltage transmission and medium-voltage distribution. As part of the Hawaiian Electric grid, the substation operates under the regulatory framework of the Hawaii Public Utilities Commission (PUC) and adheres to North American Electric Reliability Corporation (NERC) reliability standards. The facility's voltage levels suggest it is a medium-to-large substation, critical for maintaining grid stability on Oahu. The island's isolated grid requires robust infrastructure to ensure reliable power supply to residential, commercial, and military customers. The substation's location in central Oahu supports the electrical needs of the Wahiawa area, including nearby Schofield Barracks and Wheeler Army Airfield. Its role in voltage transformation and distribution is essential for integrating renewable energy sources, such as solar and wind, which are increasingly important for Hawaii's clean energy goals. The facility contributes to grid resilience and energy security for the region.
Environmental context
The substation is situated in a tropical climate with high rainfall and occasional storms, which can pose risks to overhead lines and equipment. Its location near agricultural and military areas requires careful management of vegetation and wildlife interactions. The facility's voltage levels and urban-rural interface influence its environmental footprint, including electromagnetic fields and land use. Hawaiian Electric's operations are subject to state environmental regulations aimed at minimizing impacts on local ecosystems and communities.
Frequently asked questions
Wahiawa Substation is located in Wahiawa, on the island of Oahu, Hawaii, United States. Its approximate coordinates are 21.4926° N, 158.0245° W.
Wahiawa Substation handles three voltage levels: 138,000 volts (138 kV) for high-voltage transmission, 46,000 volts (46 kV) for sub-transmission, and 12,470 volts (12.47 kV) for distribution to local customers.
Wahiawa Substation is owned and operated by Hawaiian Electric Company, the primary electric utility serving the island of Oahu.
Substations in Hawaii, including Wahiawa Substation, must comply with North American Electric Reliability Corporation (NERC) reliability standards and are regulated by the Hawaii Public Utilities Commission (PUC) for rates and service.
Wahiawa Substation is critical for stepping down high transmission voltages to distribution levels, ensuring reliable electricity supply to central Oahu, including residential areas and military installations like Schofield Barracks.