Plug-in identification method for an LCL filter of a grid converter

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

Organisaatiot

  • ABB Oy Drives

Kuvaus

This paper proposes a method for estimating the two inductances and the capacitance of an LCL filter, connected between the converter and the grid. Only the DC-bus voltage and converter phase currents need to be measured. An excitation signal is fed into the converter voltage reference. The fundamental and selected harmonic components are removed from the stored identification data to prevent biases in the parameter estimates. The parameters of the hold-equivalent discrete-time model are estimated recursively. The inductance and capacitance estimates are calculated from the estimated discrete-time parameters using the corresponding closed-form model. The proposed method can be added to existing converter control algorithms. It can provide the parameter estimates for the converter control. Further, it can be run occasionally during the normal operation in order to obtain an updated grid inductance estimate. Experimental results show that the proposed method yields very good parameter estimates and that it can also detect the changes in the grid inductance.

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut6270-6280
Sivumäärä11
JulkaisuIEEE Transactions on Industrial Electronics
Vuosikerta65
Numero8
TilaJulkaistu - 2 huhtikuuta 2018
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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