A Photovoltaic Fault Diagnosis Method Integrating Photovoltaic Power Prediction and EWMA Control Chart

Jun Su (), Zhiyuan Zeng, Chaolong Tang, Zhiquan Liu and Tianyou Li
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Jun Su: School of Electrical Engineering and Automation, Xiamen University of Technology, No. 600, Ligong Road, Jimei District, Xiamen 361024, China
Zhiyuan Zeng: School of Electrical Engineering and Automation, Xiamen University of Technology, No. 600, Ligong Road, Jimei District, Xiamen 361024, China
Chaolong Tang: School of Electrical Engineering and Automation, Xiamen University of Technology, No. 600, Ligong Road, Jimei District, Xiamen 361024, China
Zhiquan Liu: School of Electrical Engineering and Automation, Xiamen University of Technology, No. 600, Ligong Road, Jimei District, Xiamen 361024, China
Tianyou Li: School of Electrical Engineering and Automation, Xiamen University of Technology, No. 600, Ligong Road, Jimei District, Xiamen 361024, China

Energies, 2024, vol. 17, issue 17, 1-22

Abstract: The inevitability of faults arises due to prolonged exposure of photovoltaic (PV) power plants to intricate environmental conditions. Therefore, fault diagnosis of PV power plants is crucial to ensure the continuity and reliability of power generation. This paper proposes a fault diagnosis method that integrates PV power prediction and an exponentially weighted moving average (EWMA) control chart. This method predicts the PV power based on meteorological factors using the adaptive particle swarm algorithm-back propagation neural network (APSO-BPNN) model and takes its error from the actual value as a control quantity for the EWMA control chart. The EWMA control chart then monitors the error values to identify fault types. Finally, it is verified by comparison with the discrete rate (DR) analysis method. The results showed that the coefficient of determination of the prediction model of the proposed method reached 0.98. Although the DR analysis can evaluate the overall performance of the inverter and identify the faults, it often fails to point out the specific location of the faults accurately. In contrast, the EWMA control chart can monitor abnormal states such as open and short circuits and accurately locate the string where the fault occurs.

Keywords: photovoltaic fault diagnosis; EWMA control chart; discrete rate analysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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