Overview
Halawa Substation is an operational electrical substation in Hawaii, United States, owned and operated by Hawaiian Electric Company. It handles voltages of 138 kV and 46 kV, serving the Oahu grid.
Halawa Substation is an operational electrical substation located in Hawaii, United States. Owned and operated by Hawaiian Electric Company, the facility is a key node in the Oahu electrical grid, stepping down transmission voltages for local distribution. The substation handles primary voltage levels of 138 kV and 46 kV, indicating its role in both high-voltage transmission and sub-transmission. As part of the Hawaiian Electric system, Halawa Substation operates under the regulatory framework of the Hawaii Public Utilities Commission and adheres to NERC reliability standards for grid stability. The substation's dual-voltage configuration suggests it serves as a critical interconnection point, potentially linking bulk power transmission with distribution networks serving urban and residential areas in the Halawa region. The substation's location on Oahu places it within a densely populated island environment where grid reliability is paramount. Hawaiian Electric's infrastructure supports the state's renewable energy goals, with substations like Halawa facilitating integration of solar and wind resources. The facility's operational status ensures continued service to the local community, contributing to the resilience of Hawaii's electrical infrastructure.
Environmental context
Halawa Substation is situated in a tropical island environment on Oahu, where the electrical grid faces unique challenges from saltwater corrosion and hurricane risks. The substation's voltage levels and urban location require robust design to withstand coastal weather conditions. Its role in the grid supports the integration of distributed renewable energy sources, aligning with Hawaii's clean energy transition.
Frequently asked questions
Halawa Substation is located in Hawaii, United States, on the island of Oahu. Its coordinates are approximately 21.3795 N, -157.8832 W.
Halawa Substation handles voltages of 138 kV and 46 kV, serving both transmission and sub-transmission functions in the Oahu grid.
Halawa Substation is owned and operated by Hawaiian Electric Company, the primary electric utility serving Oahu and other Hawaiian islands.
Substations in the United States must comply with NERC reliability standards for grid stability and FERC regulations for transmission assets. State-level public utility commissions also oversee local operations.
Halawa Substation is a critical node in Oahu's electrical infrastructure, stepping down high-voltage power for distribution and supporting the integration of renewable energy sources like solar and wind.