Capacitor Condition Monitoring for Modular Multilevel Converter Based on Charging Transient Voltage Analysis
Hongjian Xia, Yi Zhang, Minyou Chen, Wei Lai, Dan Luo, Huai Wang
Abstract
This article proposes a capacitor condition monitoring (CM) method for modular multilevel converter (MMC) in motor drive applications. The proposed method is based on wavelet decomposition of transient voltage signals, which is independent of modulation schemes and control strategies. The equivalent series resistance (ESR) change can be detected with a moderate computation requirement. Both simulation and experimental results have verified the performance of the proposed method.
Topics & Concepts
Modular designTransient (computer programming)CapacitorVoltageElectronic engineeringComputationControl theory (sociology)Equivalent series resistanceModulation (music)Computer scienceEngineeringElectrical engineeringControl (management)PhysicsAlgorithmAcousticsArtificial intelligenceOperating systemHVDC Systems and Fault ProtectionSilicon Carbide Semiconductor TechnologiesHigh-Voltage Power Transmission Systems