Hydro Review

Kaua‘i Island Utility Cooperative (KIUC) signed agreements with The AES Corporation to develop, assemble and function the West Kaua‘i Energy Project (WKEP), a photo voltaic pumped storage hydro mission.

WKEP is an built-in renewable power and irrigation mission with a number of key parts: renewable power manufacturing through hydropower and photo voltaic photovoltaic era coupled with pumped hydropower and battery power storage to shift a lot of the mission’s output to the nighttime peak. This mission will offset the usage of eight.5 million gallons of fossil fuels yearly and provide irrigation water to assist agriculture on state-owned lands, in line with a press launch.

The mission may even rehabilitate the present Pu‘u ‘Ōpae, Pu‘u Lua, and Mānā Reservoirs and the associated ditch system infrastructure. In addition, historic diversion constructions in Kokeʻe can be modified to revive and improve stream to the Waimea River in compliance with the instream stream commonplace established by the Waimea Watershed Agreement and adopted by the Commission on Water Resources in April 2017.

“This mission’s integration of pump storage hydropower with large-scale solar energy is exclusive within the power business. Working with AES helps preserve this essential mission transferring ahead whereas minimizing danger to our cooperative. Upon completion, the ability will function at a value that may profit KIUC’s members for many years,” mentioned KIUC’s President and Chief Executive Officer David Bissell.

“WKEP will ship many advantages to KIUC’s members and the community-at-large. To identify only a few, the mission will transfer Kauaʻi past 80% renewable era, stabilize and decrease electrical energy charges over time for our members, open up dormant agricultural lands for manufacturing, guarantee enough streamflow and improve public entry and leisure alternatives related to the Pu‘u Lua Reservoir.”

The photo voltaic array will contribute as much as 35 MW to the grid and can retailer as much as 240 MWh for dispatch throughout night peak. The hydro sources are anticipated to supply 24 MW on common every day, which incorporates 12 hours of storage.

The mission is anticipated to satisfy roughly 25% of Kaua‘i’s electrical energy wants and can assist the grid with long-duration storage functionality. The pumped hydropower will present 12 hours of storage every day, in comparison with the standard four- or five-hour storage from present solar-battery services. This long-duration storage capability will enable the island to run on 100% renewable power for extended durations with out daylight and can present further grid stability by balancing intermittent photo voltaic with agency hydropower.

An influence buy settlement (PPA) was executed and filed with the Hawai‘i Public Utilities Commission on Dec. 31, 2020. Environmental research have been ongoing. A draft environmental evaluation is anticipated to be filed with the Department of Land and Natural Resources within the first quarter of 2021.

KIUC has accomplished two solar-plus-storage renewable tasks in partnership with AES: a 20- MW facility in Lāwa‘i and a 14-MW facility on the Pacific Missile Range Facility.

“AES has been a long-time supplier of low-cost electrical energy for Hawai‘i and we’re honored to proceed our profitable partnership with KIUC to assist Kaua‘i and the state in transitioning to 100% renewable power,” mentioned Woody Rubin, AES clear power chief growth officer. “We look ahead to persevering with to work with the Kaua‘i neighborhood and stakeholders to develop this mission responsibly, and to understand the agricultural, financial, and environmental advantages the mission affords.”

KIUC is a member-owned cooperative serving 34,000 clients on the island of Kauaʻi. KIUC’s Board of Directors has set a strategic purpose of reaching 70% renewable era by 2030. Currently, KIUC derives greater than…

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