An Inequality Indicator for High-Resistance Connection Fault Diagnosis in Marine Current Turbine

Marine current energy is an abundant renewable energy resource. Marine current turbines (MCTs) can convert the kinetic energy of marine currents into electrical energy. However, the variations in the marine currents are violent and complex. These characteristics will be reflected in the variation in...

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Bibliographic Details
Published in:Journal of marine science and engineering 2023-01, Vol.11 (1), p.97
Main Authors: Jia, Dongxu, Wang, Tianzhen, Amirat, Yassine, Tang, Yunjie
Format: Article
Language:English
Subjects:
Analysis
Electric power
Energy sources
Engineering Sciences
Fault diagnosis
Force and energy
high-resistance connection
Indicators
Inequality
Kinetic energy
Magnets, Permanent
marine current turbine
Marine environment
Marine resources
Mathematical analysis
Mathematics
Methods
permanent magnet synchronous machine
Permanent magnets
Renewable energy
Sensors
Synchronous machines
Thermal cycling
Turbines
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Summary:Marine current energy is an abundant renewable energy resource. Marine current turbines (MCTs) can convert the kinetic energy of marine currents into electrical energy. However, the variations in the marine currents are violent and complex. These characteristics will be reflected in the variation in the operating condition of MCTs, thus interfering with normal diagnosis for the high-resistance connection (HRC). The HRC can be caused by damaged connections between device components that are easily made due to the harsh marine environment. To diagnose HRC in MCT, an inequality indicator is proposed to quantify the current imbalance caused by HRC. The inequality indicator is defined based on the arithmetic–geometric mean inequality and can identify slight current imbalances in the early stages of HRC. The inequality indicator is robust to the variable operating conditions of the permanent magnet synchronous machine (PMSM) in the MCT. Experimental results show that the inequality indicator can be used to effectively diagnose HRC in the MCT with 100% accuracy. This research will help maintain the health condition of the MCTs and provide some ideas for diagnosis in MCTs. Moreover, the inequality indicator may provide a different approach to the analysis for other faults that can lead to a current imbalance.
ISSN:2077-1312
2077-1312
DOI:10.3390/jmse11010097