Adaptive hysteresis band current control for transformerless single-phase PV inverters

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hdl:2117/10704
Document typeConference report
Defense date2009
Rights accessOpen Access
Abstract
Current control based on hysteresis algorithms are
widely used in different applications, such as motion control,
active filtering or active/reactive power delivery control in
distributed generation systems. The hysteresis current control
provides to the system a fast and robust dynamic response, and
requires a simple implementation in standard digital signal
platforms. On the other hand, the main drawback of classical
hysteresis current control lies in the fact that the switching
frequency is variable, as the hysteresis band is fixed. In this paper
a variable band hysteresis control algorithm will be presented. As
it will be shown, this variable band permits overcoming the
aforementioned problem giving rise to an almost constant
switching frequency. The performance of this algorithm, together
with classical hysteresis controls and proportional resonant (PR)
controllers, has been evaluated in three different single-phase PV
inverter topologies, by means of simulations performed with
PSIM. In addition, the behavior of the thermal losses when using
each control structure in such converters has been studied as well.
CitationVazquez, G. [et al.]. Adaptive hysteresis band current control for transformerless single-phase PV inverters. A: IEEE International Symposium on Industrial Electronics. "IECON2009". Porto: 2009, p. 173-177.
ISBN978-1-4244-4650-6
Publisher versionhttp://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=5414770
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