The companies Alstom and Saft have provided the French utility EDF an innovative energy storage system to regulate the grid frequency. The first demonstration with lithium ion batteries of 1 MW/30min and a conversion system has just been carried out. It is the first facility of its kind in France and will be operational in late 2014.
The Alstom–Saft consortium which was born in 2013 to respond to a call for tender from EDF for a battery storage system, has signed a contract with EDF Group to supply an initial energy storage system using a lithium ion battery container. The objective is to demonstrate the system’s ability to regulate the frequency of the grid.
Alstom MaxSineTM eStorage and Saft Intensium ® Max 20M
The Alstom solution MaxSineTM eStorage, connected to the Saft Intensium ® Max 20M storage system, will be installed in the experimental R & D Center of EDF, dedicated to developing smart grids and electrical systems. Located at the headquarters of EDF in Les Renadières south of Paris (in the region of Seine-et-Marne), this is the first installation of its kind in France. The storage system and the power converter will be delivered in late 2014.
As part of this contract, Alstom and Saft provide an energy storage system of 1MW/30min and a system conversion. Saft will provide its lithium-ion Intensium ® Max system while Alstom will install its eStorage MaxSineTM storage solution.
Alstom,s eStorage MaxSineTM includes a power converter that connects the battery from the direct current to the alternating current network, and converts the electricity from direct and alternating current to be stored in the grid. It also includes an energy storage management software in real time to optimize electricity production according to the grid demands.
“The battery’s energy storage system is part of the ‘Nouvelle France Industrielle’ project, a plan launched by the French government in 2013,” explains Patrick Plas, Senior Vice President, Smart Grid & HVDC Alstom Grid. “In the forefront of smart grid and technologies for energy transport infrastructure optimization, Alstom Grid brings its technological expertise to the excellence of the French and European energy industry.”
“Saft is very pleased to supply the battery for the first frequency control system installed in France,” said François Bouchon, director of the energy storage area Saft. “With our international expertise in the integration of renewable energy, especially for networks in the area of Paris, this innovative experiment will demonstrate the added value of a battery storage system and the performance of Li-ion technology in this promising sector.”
The frequency is a measure of the grid stability, it represents the balance between the power produced and the energy consumed. To maintain this balance (and thus the frequency), the operator uses the energy available through primary reserves (mainly thermal or nuclear power plants), by blocking part of their production capacity.
The battery systems for storage provide producers and network operators greater flexibility in the power supply immediately available. In the case of an imbalance between production and consumption, the storage system can release energy to the network or store it in milliseconds, thereby controlling the frequency of the network. Experiments by EDF R & D will assess the ability of the system to regulate the frequency, and particularly the potential adjustment of the primary reserve.
Other storage projects
Alstom and Saft have already collaborated on the smart grid demonstration project Nice Gride (Nice, France), installed in late 2013, with a power storage system of 1 MW, to address the risk of instability of the network in case of massive demand for solar energy, which is intermittent.