Isolated three-port DC-DC converter employing ESS to obtain voltage balancing capability for bipolar LVDC distribution system

Juyoung Sim; Jun-Young Lee; Jee-Hoon Jung

Isolated three-port DC-DC converter employing ESS to obtain voltage balancing capability for bipolar LVDC distribution system

Juyoung Sim

Jun-Young Lee

Jee-Hoon Jung

Vol. 20, No. 3, pp. 802-810, May 2020

10.1007/s43236-020-00065-z

Bipolar LVDC distribution system

Voltage balancer

Three-port dual-active-bridge (DAB) converter

Abstract

A bipolar low-voltage DC (LVDC) distribution system used in residential and building applications requires AC–DC converters and voltage balancers that balance the two DC bus polarities. The bipolar DC bus voltage level only relies on the voltage balancer tied with the AC grid. An isolated DC–DC converter for an energy storage system (ESS) with the voltage balancing capability is proposed to prevent the bipolar voltage level collapse caused by the failure of the grid-tied voltage balancer. The proposed converter topology is an enhanced three-port dual-active-bridge (DAB) converter which can balance the bipolar DC voltage level without complex control. Furthermore, it has less current stress in power switches than that of the conventional three-port DAB converter. The effectiveness of the proposed converter is verified with a 3-kW prototype converter.

Statistics

Show / Hide Statistics

Cumulative Counts from September 30th, 2019
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.

Cite this article

[IEEE Style]

J. Sim, J. Lee, J. Jung, "Isolated three-port DC-DC converter employing ESS to obtain voltage balancing capability for bipolar LVDC distribution system," Journal of Power Electronics, vol. 20, no. 3, pp. 802-810, 2020. DOI: 10.1007/s43236-020-00065-z.

[ACM Style]

Juyoung Sim, Jun-Young Lee, and Jee-Hoon Jung. 2020. Isolated three-port DC-DC converter employing ESS to obtain voltage balancing capability for bipolar LVDC distribution system. Journal of Power Electronics, 20, 3, (2020), 802-810. DOI: 10.1007/s43236-020-00065-z.