“One significant and viable solution is to couple a stable form of large-scale electricity storage to a voltage source converter (VSC) with associated control and automation equipment,” explains Ludovic Gris, Power Electronics architect. “The stored energy can be accessed and injected into the grid when power generation is low, or demand is high, and it can be a self-sufficient solution for some regions.”
Efficiency is a key weakness of storage solutions, with batteries delivering
only 80 % of the energy input. But on a large scale, this solution based on batteries and VSC can be more economical than others. Community storage schemes could have mid-sized, decentralised storage facilities to manage fluctuations from renewable sources and to reduce the strain on conventional distribution grids. Operators would need to strike a balance between the size of their investment and the potential revenue streams – larger investments can enable the parallel provision of reserve capacity.