Verfahren und System zur Bestimmung der Kondensatorverschlechterung

Details

Veröffentlichungs-Nr.

EP4756440

Anmeldetag

5. Dezember 2024

Veröffentlichung

10. Juni 2026

Rechtsraum

EP

Abstract

A method of determining submodule capacitor degradation. The method comprising the step of determining voltage change of at least one submodule capacitor during a control cycle whilst the at least one submodule is switched into a valve circuit and assigning the voltage change as dV_vsm. The method further comprising the step of determining average voltage change across all in-circuit submodules during said control cycle and assigning the average voltage change as dV_average. The method further comprising the step of determining relative capacitance of all in-circuit submodules by comparing dV_vsm to the dV_average of all in-circuit submodules. The method may further comprise the step of determining capacitance deviation of all in-circuit submodules to quantify how much the capacitance of each in-circuit submodule deviates from the average voltage change dV_average across all in-circuit submodules. The method may further comprise the step of comparing the determined capacitance deviation against a pre-defined threshold value to identify degraded in-circuit submodules. The method may further comprise step of filtering dV_vsm and dV_average or functions of them to achieve higher accuracy of the relative capacitance determination and capacitor degradation determination.

Anmelder

Firma

GE Vernova Technology GmbH

Land

🇨🇭 Schweiz