期刊名称：International Journal of Advanced Computer Science and Applications(IJACSA)
印刷版ISSN：2158-107X
电子版ISSN：2156-5570
出版年度：2019
卷号：10
期号：12
页码：1-9
出版社：Science and Information Society (SAI)
摘要：Resonance turns into a growing issue of paramount
importance for stable operation of LCL filtered grid-connected
inverters. Active damping algorithms are widely adopted to
restrain the resonance peak associated with LCL filters. The focus
of this paper is to develop an improved active damping solution
based on filter capacitor current for better control performance of
three-phase LCL grid-connected inverters. In the proposed
solution, an improved compensator is included across the LCL
filter system and capacitor current feedback. A damping loop is
implemented with the proposed combination, which is further
feedback at a reference voltage point of the three-phase inverter
to damp the aroused resonance peak. The substantial features of
the proposed configuration are wide damping range of resonance
frequency and high control bandwidth, which results in faster
dynamic response in comparison with conventional capacitor
current proportionally feedback. Moreover, the stability of
current loop is examined in detail by implementing the proposed
damping method under the filter parametric variations. Finally,
the efficacy of the proposed method is validated by illustrating the
outcomes based on steady state and transient responses through
simulations and experimental results of the laboratory prototype.
