The PWM strategies of grid-connected distributed generation active NPC inverters

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Cita com:
hdl:2117/10641
Document typeConference lecture
Defense date2009
Rights accessOpen Access
Abstract
The Neutral Point Clamped topology due to high
efficiency, low leakage current and EMI, its integration is widely
used in the distributed generation (DG) systems. However the
main disadvantage of the NPC inverter is given by an unequal
distribution of the losses in the semiconductor devices, which
leads to an unequal distribution of temperature. By using the
Active NPC topology, the power losses distribution problem is
alleviated. The modulation strategy is a key issue for losses
distribution in this topology. In this paper two known strategies
are discussed and a new proposed PWM strategy, namely the
Adjustable Losses Distribution (ALD) PWM strategy is
proposed for better losses distribution in the Active NPC
(ANPC) topology. Simulations using Simulink and the PLECS
toolbox have been done for evaluating efficiency of different
NPC topologies and some experimental results are presented in
this paper to validate the operation of the different strategies.
CitationMa, L. [et al.]. The PWM strategies of grid-connected distributed generation active NPC inverters. A: IEEE Energy Conversion Congress and Exposition. "IEEE Energy Conversion Congress and Exposition 2009". San Jose, California: 2009, p. 920-927.
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