Mobile QR Code QR CODE : The Transactions of the Korean Institute of Electrical Engineers
Title Fault Diagnosis for Photovoltaic Inverters using a Multi-layer Neural Network
Authors 노명준(Myung-Jun Noh) ; 방준호(Junho Bang) ; 이재수(Jai-Shu Rhee) ; 조평훈(Pyoung-Hoon Cho) ; 권명회(Myeong-Hoi Kwon) ; 임종길(Jong-Gil Lim) ; 천현준(Hyun-Jun Chun) ; 송준희(Jun-Hee Song)
DOI https://doi.org/10.5370/KIEE.2021.70.7.1056
Page pp.1056-1063
ISSN 1975-8359
Keywords Multi-layer; Neural network; Photovoltaic Inverters; Inverter fault diagnosis
Abstract In this paper, an algorithm for diagnosing and predicting solar inverter failures was studied. A multi-layer neural network failure diagnosis model that can diagnose failures using inverter failure data was designed. The data were acquired from the field, and there are 307,200 items such as watt-hour meter reading value, inverter meter reading value, meter failure status, and inverter fault status.
And using this data, simulations were performed to optimize parameters, and the size and input/output, activation function, loss function, optimization function, and batch size and number of times of the neural network were determined. The final simulation was performed using the determined parameters and the failure of the inverter was diagnosed. As a result, it was confirmed that the failure of the inverter was predicted with an accuracy of up to 97 [%]. Inverter failure was predicted when the operation was completely stopped, when the error between the amount of power generation and the inverter instruction value increased, and when the efficiency of the inverter changed abruptly