Analysis, Detection, and Location of Open-Switch Submodule Failures in a Modular Multilevel Converter

The modular multilevel converter (MMC) has become one of the most promising converter topologies for medium/high-power applications. Since the MMC is structured based upon stacking up a number of series-connected identical submodules (SMs), to improve its fault tolerance and reliability, SM failure...

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Vydané v:IEEE transactions on power delivery Ročník 31; číslo 1; s. 155 - 164
Hlavní autori: Qichen Yang, Jiangchao Qin, Saeedifard, Maryam
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: New York IEEE 01.02.2016
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Predmet:
Algorithms
Calculated capacitance
Capacitance
Capacitors
Circuit faults
clustering algorithm
Clustering algorithms
Converters
Failure
Failure detection
failure detection and location
Insulated gate bipolar transistors
Mathematical analysis
Metal matrix composites
Methods
Modular
modular multilevel converter (MMC)
Servers
Switches
Trajectory
ISSN:0885-8977, 1937-4208
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Shrnutí:The modular multilevel converter (MMC) has become one of the most promising converter topologies for medium/high-power applications. Since the MMC is structured based upon stacking up a number of series-connected identical submodules (SMs), to improve its fault tolerance and reliability, SM failure detection and location is of significant importance. In this paper, the impact of open-circuit switch failures of the SMs on the operation of the MMC is analyzed. Based on the analysis under SM failure conditions, two SM failure detection and location methods are proposed, that is, a clustering algorithm (CA)-based method and a calculated capacitance (CC)-based method. In the proposed CA-based method, a pattern-recognition-based fault diagnosis approach, which employs the clustering algorithm to detect and locate the faulty SMs with open-switch failures through identifying the pattern of 2-D trajectories of the SM characteristic variables, is developed. The proposed CC-based method is based on the calculation and comparison of a physical component parameter, that is, the nominal SM capacitance, and is capable of failure detection, location, and classification within one stage. The performance of the proposed failure detection methods for an MMC system is evaluated based on time-domain simulation studies in the PSCAD/EMTDC software environment. The reported study results demonstrate the capabilities of the two proposed methods in detecting and locating any SM failure under various conditions accurately and efficiently.
Bibliografia:ObjectType-Article-1
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ISSN:0885-8977
1937-4208
DOI:10.1109/TPWRD.2015.2477476