Detection Criterion for Progressive Faults in Photovoltaic Modules Based on Differential Voltage Measurements

Abstract

PV modules may experience degradation conditions that affect their power efficiency and affect the rest of the PV array. Based on the literature review, this paper links the parameter variation on a PV module with the six most common degradation faults, namely, series resistance degradation, optical homogeneous degradation, optical heterogeneous degradation, potential induced degradation, micro-cracks, and light-induced degradation. A Monte Carlo-based numerical simulation was used to study the effect of the faults mentioned above in the voltage of the modules in a PV array with one faulty module. A simple expression to identify faults was derived based on the obtained results. The simplicity of this expression allows integrating the fault detection technique in low-cost electronic circuits embedded in a PV module, optimizer, or microinverter.

Investigation of Failures during Commissioning and Operation in Photovoltaic Power Systems

“…In this study, a grid-connected solar power plant modeled in the MATLAB Simulink program and its electrical faults are examined. In [12], a fault is described as, "an abnormal condition that may cause a reduction in, or loss of, the capability of a functional unit to perform a required function". Recent years have seen a significant increase in the research area of fault classification and detection since defects in PV power plants may affect their capacity to generate electricity [13].…”

Fault Diagnosis in Solar Array I-V Curves Using Characteristic Simulation and Multi-Input Models

“…Under external voltage, sodium ions in the glass migrate and accumulate on or enter the surface of the cells, causing shunting and reducing their efficiency. PID faults occur after long-term operation of the module [17].…”