Photovoltaic Module Fault Detection Based on a Convolutional Neural Network

Abstract

With the rapid development of solar energy, the photovoltaic (PV) module fault detection plays an important role in knowing how to enhance the reliability of the solar photovoltaic system and knowing the fault type when a system problem occurs. Therefore, this paper proposed the hybrid algorithm of chaos synchronization detection method (CSDM) with convolutional neural network (CNN) for studying PV module fault detection. Four common PV module states were discussed, including the normal PV module, module breakage, module contact defectiveness and module bypass diode failure. First of all, the defects in 16 pieces of 20W monocrystalline silicon PV modules were preprocessed, and there were four pieces of each fault state. When the signal generator delivered high frequency voltage to the PV module, the original signal was measured and captured by the NI PXI-5105 high-speed data acquisition system (DAS) and was calculated by CSDM, to establish the chaos dynamic error map as the image feature of fault diagnosis. Finally, the CNN was employed for diagnosing the fault state of the PV module. The findings show that after entering 400 random fault data (100 data for each fault) into the proposed method for recognition, the recognition accuracy rate of the proposed method was as high as 99.5%, which is better than the traditional ENN algorithm that had a recognition rate of 86.75%. In addition, the advantage of the proposed algorithm is that the mass original measured data can be reduced by CSDM, the subtle changes in the output signals are captured effectively and displayed in images, and the PV module fault state is accurately recognized by CNN.

A Comprehensive Review of Artificial Intelligence Applications in the Photovoltaic Systems

“…CNN is composed of convolution layer, pooling layer, etc., which has a good application in image processing. Li et al [109] first applied CNN to the module fault problem of PV systems in 2018. CNN can classify different module faults, which helps to identify faults faster and take corresponding solutions.…”

Using a One-Dimensional Convolutional Neural Network with Taguchi Parametric Optimization for a Permanent-Magnet Synchronous Motor Fault-Diagnosis System

“…The convolution operation is performed through convolution kernels and filters of different sizes. Image feature extraction or feature enhancement is performed using spatial filtering, and the output feature map from the convolution layer is controlled by padding and stride [32]. The filter is the number of output channels after convolution, and the convolution kernel is the filter size used to perform convolution on the image.…”

Real-time Fault Diagnosis of Photovoltaic Modules for Integrated Energy Systems Based on YOLOv7

“…Meanwhile, the equipment of the PV power station is scattered, the efficiency of manual inspection is low, and the operation and maintenance cost is high [9]. In the operation and maintenance process of PV power stations, fault diagnosis and accurate positioning of PV modules have become key technologies, which are effective means to facilitate the fine operation and maintenance management of PV power stations and improve the energy efficiency of power generation systems [10]. Therefore, the fault diagnosis and location technology of PV array has become the current research hotspot.…”