Journal
ELECTRONICS
Volume 12, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/electronics12020282
Keywords
PV sensor faults; residual formation; robust sliding mode observer; sensor fault diagnosis; standalone PV system
Ask authors/readers for more resources
This article presents a sliding mode observer-based fault diagnosis scheme for detecting sensor faults in a standalone PV system. The proposed scheme uses residual formation for fault detection based on a defined threshold. Additionally, the sliding mode observer reduces the number of sensors required in the PV system, serving as software redundancy in fault-tolerant control.
The search for sustainability and green energy, in electricity production, has lead many researchers to study and improve photovoltaic (PV) systems. The PV systems, being a combination of power electronic modules and PV array, have high tendency of faults in sensors, switches, and passive devices. Thus, a reliable fault diagnosis (FD) scheme plays a significant role in protecting PV systems. In this article, a sliding mode observer (SMO)-based FD scheme is presented to figure out the sensor faults in a standalone PV system. The proposed FD scheme makes use of residual formation which in turn helps in detection of faults on the basis of a defined threshold. In addition to the functionality of fault detection, the SMO provides the benefit of reduction in number of sensors required in the PV system. This feature can be utilized as software redundancy in fault-tolerant control (FTC). The test bench, standalone PV system, is equipped with a buck-boost converter for maximum power transfer (MPT) to the connected load. Moreover, the FD scheme is backed by a back-stepping (BS) analogy-based control scheme for extraction of maximum power from the PV panel. The simulations are performed in the MATLAB/Simulink platform under varying environmental conditions (temperature and irradiance) and resistive load. These simulations, subjected to varying operating conditions, confirm the efficacy, in terms of robustness, chattering (oscillations about the reference), and steady-state error, of the proposed scheme.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available