IEEE Power Electronics Magazine - March 2014 - 43

approach is a high-density power
conversion, with simultaneous highperformance features suitable for
next-generation wind power systems for both onshore and offshore
applications. The proposed topology
employs one-phase multilevel ac-ac
converters on the utility side and
3 # 1 matrix converters on the WTG
side interfaced using an MFT. This
avoids dc-link capacitors and/or resonant LC components in the power
flow path, thereby improving the
power density and reliability. As the
system is lightweight, it can possibly
be located at the base of the tower
itself. This topology can be used
in other renewable energy power
converters, motor drives, electric
locomotives, and so on, with slight
modifications. The validity of the
proposed concept has been verified
by the simulation results and experiment waveforms from a 6.6-kVA
scaled-down laboratory prototype.
Chen's presentation involved
improving the audio susceptibility and input impedance of stacked
boost converters (SBCs), which are
widely adopted in aerospace applications due to their superior high
efficiency, continuous current, and
easily controlled system. In the SBC

parasitic parameters is also developed to analyze the loop gain, output
impedance, input impedance, and
audio susceptibility under two types
of capacitor structures. The calculated and experimental results demonstrate that single capacitor is more
suitable for SBC.

with three capacitors, the resonance
of the stray inductance of stacked
branch and output capacitors worsen
the closed-loop input impedance and
audio susceptibility. To eliminate
the resonance, the three capacitors
are optimized as a single capacitor.
An accurate model considering the

fig 3 Tiancong Shao of Beijing Jiaotong University gives a presentation.

fig 4 The best and excellent presentation awardees.

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March 2014

z IEEE Power Electronics Magazine

43

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