2019 IEEE Energy Conversion Congress and Exposition (ECCE) 2019
DOI: 10.1109/ecce.2019.8912289
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Real-time Identification Method for LCL Filters Used With Grid Converters

Abstract: This paper presents a real-time algorithm for identifying the inductance and capacitance values of LCL filters used with grid converters. As a side product, the grid inductance seen from the point of common coupling is also estimated. A wideband excitation signal is added to the converter voltage reference. During the excitation, the converter currents and the converter voltage reference are sampled. The samples are preprocessed in real time by removing DC biases and significant grid-frequency harmonics. Param… Show more

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Cited by 1 publication
(3 citation statements)
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“…where the tilde indicates that the DFT bin calculated in (20) has phase error that is corrected with (21). Finally, as shown in Fig.…”
Section: B Harmonic Removalmentioning
confidence: 99%
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“…where the tilde indicates that the DFT bin calculated in (20) has phase error that is corrected with (21). Finally, as shown in Fig.…”
Section: B Harmonic Removalmentioning
confidence: 99%
“…In the covariance wind-up, the values of a number of elements in the covariance matrix tend to zero, causing the estimation algorithm to become insensitive to certain parameter changes. In [20], two different methods to enable tracking of timevarying parameters were presented. Here, only the constant forgetting factor is considered.…”
Section: Model Parameter Estimationmentioning
confidence: 99%
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