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Lithium-ion based battery energy storage systems have become promising energy storage system (ESS) due to a high efficiency and long life time. This paper studies the DC link capacitor selection for a 250kW ESS. The battery bank in an ESS needs a low ripple environment to extend the lifetime. For filtering the switching ripple on the DC bus, large electrolytic capacitors are needed to absorb the current...
This paper introduces a multilevel converter topology with common flying capacitors shared by phases. The unique feature of this configuration makes contribution to reduce the total number of components like switching devices and capacitors, which is closely related to the converter cost and volume. Therefore, low cost and high power density are expected to be achieved. A three-phase 5-level converter,...
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