Performance analysis of a triple-active bridge converter for interconnection of future dc-grids

Dielectric Losses in Dry-Type Insulation of Medium-Voltage Power Electronic Converters

“…-The approximations based on the imaginary part of the permittivity are used for extracting the losses (cf. (27), (28), (29), and (30)). This method is only applicable to PWM voltages (not for sinusoidal).…”

“…This is the derivation of the approximation of the dielectric losses produced by frequency-dependent materials under PWM voltages (cf. (27), (28), (29), and (30)). First, the duty cycle is fixed to D c = 50 %.…”

“…which, together with (48), is equal, after some trivial algebraic operations, to the expressions proposed in (27), (28), (29), and (30).…”

“…Moreover, due to the high power density, elevated operating temperatures are usually occurring inside power converters. Additionally, the emergence of converter topologies featuring complex voltage waveforms, such as multi-level output voltages [15], [25] or multiple galvanically insulated ports [26]- [28], is creating new challenges for design of the electrical insulation. For these reasons, the insulation used in such power converters requires a careful examination in order to obtain a solution which accommodates the opposing requirements for compactness, long-term reliability, thermal management, and EMI performance [12], [13], [23], [29].…”

Applications of Triple Active Bridge Converter for Future Grid and Integrated Energy Systems

“…The future DC grid has potential in household applications, for which the TAB converter has an advantage [19][20][21][22]. It can be used to connect medium and low voltages in the DC distribution grid [26][27][28][29][30]. An uninterruptible power supply (UPS), which uses a battery to support the source in the worst-case scenario, is a suitable application for the TAB converter [31][32][33].…”