Comparison and Control of Voltage Balancers for Bipolar DC Aircraft Power Systems

DC–DC Converters for Bipolar Microgrid Voltage Balancing: A Comprehensive Review of Architectures and Topologies

“…Due to aforementioned reasons, these networks are proposed and used in several applications, such as, dc distribution, large data centers, homes and buildings, electric ships and also in electric aircrafts [13], [17]- [20]. These grids can also be a suitable option in the charging infrastructures associated to EVs.…”

“…This voltage balancer can balance the middle (zero) terminal voltage through the operation of power devices S1 and S2 to boost or buck the voltage supplied by the rectifier. It has been widely applied and usually placed as a second stage to unidirectional or bidirectional grid rectifiers [16], [28] or in aircraft power systems [20]. Despite its simplicity, it presents as main disadvantage the relatively high current ripple in the inductor and the bulky dc-link capacitors.…”

“…Nevertheless, it requires a higher number of components compared to the centralized buck-boost type balancer. Note that in some of the following figures, the connected rectifier and the three-phase grid are not represented Another topology adopted as centralized voltage balancer was derived from the bidirectional Ćuk converter [20], [28]. Despite a larger device count (Fig.…”

“…These twovoltage balancers also belong to the family of high-order converters and, therefore, have no shoot-through problems [28]. On the other hand, some interleaving approaches have been proposed, aiming to mitigate the influence of the current ripple in classical voltage-based topologies [20], [28]. In this interleaved buck-boost voltage balancer (Fig.…”