Recent Developments and Emerging Trends of New Electrical Energy Storage Systems

Dear Colleagues,

Energy storage is a requirement for the successful introduction of the growing number of renewable energy sources into future society. Energy storage is needed for storing energy for intermittent energy production from wind and solar, as well as for the long- and medium-term. For large-scale long-time storage, i.e., days–months, hydrogen and pumped power are nowadays more cost-efficient than direct electrical storage. For shorter times (hours–days) or smaller-sized systems, battery storage systems are commonly used. Short term energy storage (seconds to minutes) will also be required to stabilize the power grid. This could be through the generation of synthetic inertia for the grid or maintaining voltage levels in rapid fluctuations in intermittent renewable energy production, e.g., when a solar power installation far out in the grid is suddenly covered by passing clouds.

This Special Issue focuses on technology that enables, improves, and reduces the cost for electric energy storage systems. Both the storage elements and power electronics for the efficient utilization of the storage elements are covered. This includes, among others, battery systems, converters for battery/supercapacitor charging and/or discharging, bidirectional power converters, and technology utilizing car batteries for the grid or personal storage (vehicle to grid). It also includes technology for combining different energy storage elements into a system in order to achieve some benefits such as supercapacitors/fuel cells, superconducting magnetic energy storage (SMES)/batteries, pump power/battery, etc. The cost of electrical energy storage systems is currently very high, and cost-effective systems are very interesting, such as refurbished battery storage, low-cost energy storage elements, low cost converters, or other innovative solutions.

Prof. Dr. Kent Bertilsson
Guest Editor

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