SDG&E to stabilise grid with energy storage


Under the two deals, AES will develop two energy storage systems to help the utility firm ensure grid reliability in San Diego.

The storage systems will store energy up to 37.5MW, and feed this power to the grid for four continuous hours and are expected to be complete by January, 2017.

The storage soltuion will include Samsung SDI batteries and power conversion technologies developed by Parker Hannifin.

Under the first contract, AES will develop a 30MW power storage plant at the utility’s substation in Escondido.

The system is claimed to be the largest energy storage system in the US.

The two firms will also construct a 7.5MW system in El Cajon.

[quote] In a press statement, SDG&E said it will use the storage systems to increase its renewable energy generation.

James P. Avery, chief development officer at SDG&E, said:  “These batteries are beneficial because they maintain a reliable flow of energy to customers when they need it most.”

Energy storage research

In mid-June, US municipal utility EPB partnered with UniEnergy and three US laboratories to assess the benefits of storage systems for grid reliability.

The Washington-based energy storage firm will supply its Reflex energy storage system for integration with EPB’s 1MW solar array and advanced fiber communication network.
Researchers from the Oak Ridge National Laboratory, Pacific Northwest National Laboratory and the Sandia National Laboratories will then analyse the value streams, operational modes, and optimal utilisation of the solar-plus-energy storage system. [S&C Electric procures energy storage system for solar project].

The three labs will also provide technical evaluation on how 2MW of additional solar PV power can be added on to the storage system.

The $2.5 million project falls under the US Department of Energy’s Grid Modernisation Initiative which aims to ensure the nation’s grid reliability by developing grid and renewable energy interoperability technologies.


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