Andritz to supply pump turbines for pumped storage power plant in Dubai

Technology group Andritz, as part of a consortium with European construction group Strabag, has signed a contract with Dubai Electricity and Water Authority (DEWA) to supply and commission the electro- and hydro-mechanical equipment for the Hatta Pumped Storage Power Plant.

Start-up of the facility, which is located in the Hajar Mountains, 140km southeast of Dubai, is expected during the first quarter of 2024. The contract for the equipment is valued at over €100 million.

Andritz will supply the electro-mechanical equipment for two 125MW Francis-type pump turbines with double-fed asynchronous generators and auxiliary systems, all gates and trashracks, 320m of penstocks, main inlet valves, main power transformers, GIS switchyard, and high-voltage cables to connect the new power plant to the national grid.

The Hatta plant is expected to be the first project of its kind on the Arabian Peninsula. The concept is based on a shaft-type powerhouse close to the existing hydro reservoir, capable of providing 250MW for six hours.

Due to the limited reservoir capacity, the available head will vary between 175m and 125m during the cycle. To overcome this variation in head but keep the units running efficiently over the cycle, both pump turbine units are equipped with double-fed asynchronous motor-generators, allowing the units to operate at variable speed.

In its goal to increase the share of renewable energy from 7% to 75% by 2050, Dubai has committed to building necessary hydro-pumped storage capacity while increasing the share of power generation from renewable sources. DEWA will use this storage capacity to balance the volatility of these renewable energy sources.

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