Overview
Kapolei Substation is an operational electrical substation in Kapolei, Hawaii, owned and operated by Hawaiian Electric Company. It handles voltages of 46 kV and 12.47 kV, serving the local grid.
Kapolei Substation is an operational electrical substation located in Kapolei, Hawaii, United States. Owned and operated by Hawaiian Electric Company, the facility plays a key role in the state's electrical infrastructure, stepping down transmission voltages for distribution to residential and commercial customers. The substation operates at two voltage levels: 46 kV (subtransmission) and 12.47 kV (primary distribution). This configuration is typical for Hawaiian Electric's grid, which must balance island-wide reliability with the challenges of isolated power systems. The facility adheres to NERC reliability standards and is subject to FERC regulation for interconnection and grid stability. As part of Hawaiian Electric's network on Oahu, Kapolei Substation supports the growing Kapolei area, a major urban center. Its operation is critical for maintaining voltage stability and ensuring reliable power supply to homes, businesses, and critical infrastructure in the region.
Environmental context
Located in the coastal plain of Oahu, Kapolei Substation operates in a tropical climate with high humidity and salt-laden air, which can accelerate corrosion of electrical equipment. The substation's urban setting requires careful management of electromagnetic fields and noise, while its proximity to the coast necessitates robust grounding and insulation to withstand occasional storms and high winds.
Frequently asked questions
Kapolei Substation is located in Kapolei, Hawaii, United States, at coordinates 21.330700, -158.054449.
Kapolei Substation operates at 46 kV (subtransmission) and 12.47 kV (primary distribution) voltage levels.
Kapolei Substation is owned and operated by Hawaiian Electric Company, the primary electric utility serving Oahu.
As part of the U.S. grid, Kapolei Substation must comply with NERC reliability standards and FERC regulations for transmission-level assets, ensuring grid stability and security.
Kapolei Substation steps down transmission voltage for distribution to residential and commercial customers in the Kapolei area, supporting the region's growing urban infrastructure.