Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 37, Issue 3, Pages 3544-3554Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2021.3118602
Keywords
Capacitors; Capacitance; Monitoring; Power electronics; Insulated gate bipolar transistors; Voltage; Switches; Capacitors; condition health monitoring (CHM); modular multilevel converter (MMC); submodule (SM)
Categories
Funding
- Swiss Governmental Scholarship for foreign students
- Swiss InnovationAgency -Innosuisse [38041.1 IP-ENG]
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This article proposes a simple method for monitoring submodule capacitance in a modular multilevel converter, which can be deployed without disturbing or impacting the normal converter operation. Offline and real-time simulations, as well as experimental results, demonstrate the effectiveness of the proposed method in identifying changes in the submodule capacitance.
With a large deployment of power electronic converters in various critical applications, condition health monitoring is increasingly becoming important. In modular multilevel converter, submodule capacitors represent one of the critical components having a strong impact on the overall converter cost and performance. This article proposes a simple method for the submodule capacitance monitoring, deployed directly on the low-cost submodule controller and operating without disturbing or impacting the normal converter operation. Offline and real-time simulations, as well as experimental results, demonstrate the effectiveness of the proposed method in identifying changes in the submodule capacitance, which is of high importance for reliable converter operation.
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