Andritz reveals scope of its work for 250-MW Hatta pumped storage in UAE

Andritz reports it has signed a contract — as part of a consortium with the European construction group Strabag — with Dubai Electricity and Water Authority (DEWA) to supply and commission the entire electromechanical and hydromechanical equipment for the 250-MW Hatta Pumped Storage Power Plant in the United Arab Emirates.

Startup of the plant, located in the Hajar Mountains 140 km southeast of Dubai, is expected for the first quarter of 2024. The value of this contract is more than €100 million (US$109.6 million), Andritz says.

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

Hatta will be the first project of its kind on the Arabian Peninsula. The final concept is based on a shaft-type powerhouse close to the existing hydro reservoir, capable of providing 250 MW for six hours. Due to the relatively limited reservoir capacity, the available head will vary between 175 m and 125 m during the cycle. To overcome this substantial variation in head but still keep the units running at a high efficiency level over the complete cycle, both pump-turbine units are equipped with double-fed asynchronous motor-generators, allowing the units to operate at variable speed.

Dubai has the goal to diversify the emirate’s energy mix and increase the share of renewable energy from the current level of 7% to 75% by 2050. To achieve this ambitious target, DEWA decided to increase the share of power generation from renewable sources and also build the necessary hydro-pumped storage capacity required to balance the volatility of intermittent renewable energy sources.

Andritz Hydro is a global supplier of electromechanical equipment for hydropower plants. The company has more than 175 years of accumulated experience and more than 31,000 turbines installed, totaling about 430,000 MW.

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