Comparison of Full Power and Partial Power Buck-Boost DC-DC Converters for Residential Battery Energy Storage Applications

Review of DC-DC Partial Power Converter Configurations and Topologies

“…The stress factor coefficients provide a quantitative approach to evaluate and compare converter designs (topology) [15,[18][19][20], independently of their power ratings. The three main components of any power converter are semiconductor switches, magnetic windings, and capacitors.…”

“…Load power P Load also has a direct impact on the component stress factors, where it is observed in [20] that increasing P Load will lead to larger stress on components in the case of a full-power rated converter compared to PPC.…”

“…Lastly, non-active power (N) is the energy stored in the reactive element (capacitor or inductor) and not transferred from the input to the output of a DC-DC converter operating in the steady state [2,20], defined also in Institute of Electrical and Electronics Engineers (IEEE) standard 1459 [26] and measured in Volt-Ampere Reactive (VAR). Inductor non-active power (N L ) and capacitor non-active power (N C ) are evaluated by (12) and (13), where E L and E C are the energy stored in inductor and capacitor in joules, D is the dimensionless duty cycle of each switching period T s .…”

“…As it can be seen from [16,20,29,33], for example, the PPC efficiency holds high values throughout a wide range of operating conditions, contrary to the full-power converter, which achieves high efficiency generally at a specific operating point.…”

“…The voltage and current equations are stated again in Table 6 for easy reference; however, the same equations were already developed in Table 1 for IPOS (b), and Table 3 for ISOP (b). Equations ( 16), (20), and (25) remain valid to represent K pr as a function of G V for nonisolated IPOS-b, ISOP-b, and ISOS-a, respectively.…”