Sensorless Current Pulsation Compensation in a Hybrid Energy Storage

This paper presents a dual active bridge DC/DC converter used as an AC current compensator in hybrid energy storage application. The the DC link appears when three-phase, four-wire inverter operates with unbalanced output currents—for example, trying to compensate for grid voltage unbalance. has adverse effects on operation of electrochemical storage, and it should be compensated. To achieve this, is introduced into circuit inverter—a capacitor bank. responsible compensating pulsation by creating its own opposite phase. In paper, genesis this explained, compensation proposed along sensorless algorithm. algorithm based symmetrical decomposition generate reference signal compensator. numerical analysis presented, verified laboratory bench.