Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 37, Issue 4, Pages 4545-4552Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2021.3127241
Keywords
Capacitance; Inverters; Harmonic analysis; Power measurement; Couplings; Power system stability; Object recognition; Converters; measurements; modeling; power electronics (PEs); power systems
Categories
Funding
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [360497354]
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This article presents a non-destructive measurement method for identifying the dc-link capacitance in single-phase power electronic devices, aiming at modeling purposes. The diverse approaches used by manufacturers in designing the components of these devices pose challenges to their modeling and analysis of their interaction with other devices and low voltage networks. The article proposes a new method to identify dc-link capacitance based on analyzing the ripple part of the dc-link voltage, and provides analytical background and simulative validation. Finally, a laboratory application to a commercially available single-phase inverter for photovoltaic systems is demonstrated through real measurement.
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.
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