Hierarchical anomaly detection and multimodal classification in large-scale photovoltaic systems

Yingying Zhao, Qi Liu, Dongsheng Li, Dahai Kang, Qin Lv, Li Shang

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

Operation anomalies are common phenomena in large-scale solar farms. Effective anomaly detection and classification is essential for improving operation reliability and electricity generation. However, this is a challenging task due to the high complexity and wide variety of frequently occurring anomalies. Furthermore, existing preinstalled supervisory control and data acquisition systems (SCADA) can only provide a limited amount of information regarding the healthy condition of solar farms, making accurate anomaly detection and classification difficult. This paper presents a data-driven anomaly detection and classification solution, which can accurately detect and classify diverse photovoltaic system anomalies. The proposed solution does not require additional equipment or non-SCADA data collection. More specifically, the proposed work consists of two methods: 1) a hierarchical context-aware anomaly detection method using unsupervised learning; and 2) a multimodal anomaly classification method. The proposed solution has been deployed in two large-scale solar farms (39.36 and 21.62 MWp). Multimonth operation demonstrates the effectiveness, robustness, and cost and computation efficiency of the proposed solution.
Original languageEnglish
Pages (from-to)1351 - 1361
JournalIEEE Transactions on Sustainable Energy
Volume10
Issue number3
Early online date24 Aug 2018
DOIs
Publication statusPublished - Jul 2019

Keywords

  • Anomaly detection
  • anomaly classification
  • photovoltaic system
  • machine learning

Fingerprint

Dive into the research topics of 'Hierarchical anomaly detection and multimodal classification in large-scale photovoltaic systems'. Together they form a unique fingerprint.

Cite this