Page 349 - Renewable Energy Devices and System with Simulations in MATLAB and ANSYS

336 Renewable Energy Devices and Systems with Simulations in MATLAB and ANSYS ®
®

+
C DC
AC L
V DC Energy
storage

C DC
–

FIGURE 13.18 A three-level diode-clamped power converter that can operate as a bidirectional multilevel
converter.

L 1 C 1 L 2
+ +
Energy
V in C 1 C 2 V out storage
– –
(a)

L 1 C 1
+ +
Energy
V in C 1 L 2 C 2 V out storage
– –
(b)

FIGURE 13.19 DC/DC converters: Cuk (a) and Sepic/Luo (b), based on [75–78].

+
+ +
L 1 L
C V Energy V in C 2 Energy
+ 2 out storage C 1 V out storage
V in C 1 – – –
–
(a) (b)

FIGURE 13.20 DC/DC converters: Half-bridge (HB) (a) and cascaded HB (b).

In order to further reduce the current ripple through the inductor, reduce the size and weight
of the inductor, and minimize the current stress on the active switches, cascaded HB and multi-
phase interleaved converters have been developed [83, 84]. These two types of converters have
similar principles of operation. A two-phase interleaved bidirectional DC/DC converter is shown in
Figure 13.21.