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Diagnosis and mitigation of voltage and current sensors malfunctioning in a grid connected PV system
Citation
Saha, S and Haque, ME and Tan, CP and Mahmud, MA and Arif, MT and Lyden, S and Mendis, N, Diagnosis and mitigation of voltage and current sensors malfunctioning in a grid connected PV system, International Journal of Electrical Power and Energy Systems, 115 Article 105381. ISSN 0142-0615 (2019) [Refereed Article]
Copyright Statement
© 2019 Elsevier Ltd. All rights reserved.
DOI: doi:10.1016/j.ijepes.2019.105381
Abstract
Accuracy of sensors measuring Photovoltaic (PV) array output voltage, current and the ac currents flowing between VSC and grid plays an indispensable role in efficient operation of a grid connected PV system. Erroneous measurements due to malfunctioning of aforementioned sensors can cause significant disruptions in the operation of a PV system, as the impact of erroneous measurements propagate through the controllers in a PV system. In this paper, malfunctioning of PV system sensors are regarded as sensor faults. This paper presents an approach for diagnosis and mitigation of sensor faults in a PV system. The fault diagnosis approach is based on the sliding mode observer (SMO)-based fault detection and identification theory, which is capable of accurately estimating faults in sensor measurements. Estimated faults are used by the fault mitigation technique in the proposed approach to rectify the sensor measurements. The rectified sensor measurements are used by the controllers in PV system, instead of possibly erroneous sensor measurements, which ensure fault resilient operation of the PV system. The efficacy of the proposed approach has been validated through rigorous simulation and experimental studies.
Item Details
Item Type: | Refereed Article |
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Keywords: | PV system, sensor fault, MPPT |
Research Division: | Engineering |
Research Group: | Electrical engineering |
Research Field: | Electrical energy generation (incl. renewables, excl. photovoltaics) |
Objective Division: | Energy |
Objective Group: | Renewable energy |
Objective Field: | Solar-photovoltaic energy |
UTAS Author: | Lyden, S (Dr Sarah Lyden) |
ID Code: | 134508 |
Year Published: | 2019 |
Web of Science® Times Cited: | 6 |
Deposited By: | Engineering |
Deposited On: | 2019-08-15 |
Last Modified: | 2019-12-24 |
Downloads: | 0 |
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