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Active power filters (APF) are the most effective solution to compensate harmonic currents of nonlinear loads. Usually, they are connected to the grid via first-order inductive filter L, and in consequence inject to the grid parasitic current ripples caused VSI switching. This serious drawback can be removed by connecting APF's VSI via LCL filter. Such a solution requires control that overcomes resonance...
The paper presents the single phase uninterruptible power supply (UPS) system with galvanic separated DC-AC-DC-AC converters operating in parallel. The CAN physical layer based system of communication between converters has been developed and applied, which allow to utilize a decentralized master-slave control providing high availability factor of the whole UPS system. The control system of particular...
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