Port Allen Switchyard - Substation in Kauai, Hawaii, United States

Port Allen Switchyard is a substation located in Kauai, Hawaii, United States. Owned and operated by Kauai Island Utility Cooperative, it plays a key role in distributing electricity across the island. The facility operates at a voltage of 57.1 kV, typical for a medium-voltage substation supporting local distribution networks. As part of the U.S. electrical infrastructure, the substation operates under the regulatory framework of the North American Electric Reliability Corporation (NERC) and the Federal Energy Regulatory Commission (FERC). These standards ensure grid reliability and security. The facility's voltage level and island location make it critical for maintaining stable power supply to Kauai's communities. The substation's operational significance lies in its role within Kauai's isolated grid, where reliability is paramount. It supports the cooperative's mission to provide affordable and reliable electricity to its members, contributing to the island's energy resilience.

Located in Kauai, Hawaii, the substation operates in a tropical island environment with unique challenges such as exposure to salt air and hurricane risks. The facility's design and maintenance must account for these conditions to ensure grid stability. Its voltage level and criticality to the local grid underscore the importance of robust infrastructure in island settings.