Dynamic Requirements on LFP Batteries used for Providing Virtual Inertia
Stable security of energy supply requires an equilibrium of supplied and consumed power at any time. Deviations between demand and supply cause an instant increase or decrease of the grids frequency. Ancillary services ensure a constant frequency in the public transmission grid by providing inertia and balancing power in form of primary and secondary system service reserve power as well as minute reserve. In the project, funded by the DFG (Deutsche Forschungsgemeinschaft, German Research Association) scientists research the use and application of high power batteries to maintain the system frequency. Experiments and simulations were carried out with a virtual synchronaus machine which responses on frequency fluctuations and provides regulating power from LFP (lithium iron phosphate) batteries.
This paper deals with the electronic set-up for providing virtual inertia by use of the „virtual synchronaus machine“ (VISMA) and results of lifetime experiments and models for lithium-ion batteries especially for high dynamic loads are presented.
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