Measurement-Based Identification of DC-Link Capacitance of Single-Phase Power Electronic Devices for Grey-Box Modeling

Research output: Contribution to journalResearch articleContributedpeer-review


This article presents a non-destructive measurement-based identification of the dc-link capacitance in single-phase power electronic devices for modeling purposes. These devices are typically found in public low voltage networks for low power applications. A large number of manufacturers of these devices with individual approaches to the design of the components of the power electronic devices challenges the modeling and thus the analysis of their interaction with other devices and the low voltage network. Since the manufacturers typically do not disclose their design, only little information based on the assumptions can be made with regard to an individual device. This article provides a new method to identify the dc-link capacitance of single-phase power electronic devices based on analyzing the ripple part of the dc-link voltage, which contributes to the present research activities toward realistic modeling of such devices for power systems studies. The analytical background is provided and a simulative validation is performed. Finally, a laboratory application to a commercially available single-phase inverter for photovoltaic systems is demonstrated in terms of real measurement.


Original languageEnglish
Pages (from-to)4545-4552
Number of pages8
JournalIEEE transactions on power electronics
Issue number4
Publication statusPublished - Apr 2022

External IDs

Scopus 85119432773
WOS 000733963100081
Mendeley 5f547aa2-a10a-3d5f-b0f8-acb3398cedd9
unpaywall 10.1109/tpel.2021.3127241
ORCID /0000-0001-8439-7786/work/142244111


Research priority areas of TU Dresden

Sustainable Development Goals

ASJC Scopus subject areas


  • Capacitance, Converters, Couplings, Harmonic analysis, Inverters, Object recognition, Power measurement, Power system stability, measurements, modeling, power electronics (PEs), power systems