Machine Learning for Solar Array Monitoring, Optimization, and Control

Sunil Rao, Sameeksha Katoch, Vivek Narayanaswamy, Gowtham Muniraju, Cihan Tepedelenlioglu, Andreas Spanias, Pavan Turaga, Raja Ayyanar, Devarajan Srinivasan

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The efficiency of solar energy farms requires detailed analytics and information on each panel regarding voltage, current, temperature, and irradiance. Monitoring utility-scale solar arrays was shown to minimize the cost of maintenance and help optimize the performance of the photo-voltaic arrays under various conditions. We describe a project that includes development of machine learning and signal processing algorithms along with a solar array testbed for the purpose of PV monitoring and control. The 18kW PV array testbed consists of 104 panels fitted with smart monitoring devices. Each of these devices embeds sensors, wireless transceivers, and relays that enable continuous monitoring, fault detection, and real-time connection topology changes. The facility enables networked data exchanges via the use of wireless data sharing with servers, fusion and control centers, and mobile devices. We develop machine learning and neural network algorithms for fault classification. In addition, we use weather camera data for cloud movement prediction using kernel regression techniques which serves as the input that guides topology reconfiguration. Camera and satellite sensing of skyline features as well as parameter sensing at each panel provides information for fault detection and power output optimization using topology reconfiguration achieved using programmable actuators (relays) in the SMDs. More specifically, a custom neural network algorithm guides the selection among four standardized topologies. Accuracy in fault detection is demonstrate at the level of 90+% and topology optimization provides increase in power by as much as 16% under shading. Table of Contents: Acknowledgments / Introduction / Solar Array Research Testbed / Fault Classification Using Machine Learning / Shading Prediction for Power Optimization / Topology Reconfiguration Using Neural Networks / Summary / Bibliography / Authors' Biographies

Original languageEnglish (US)
Pages (from-to)1-91
Number of pages91
JournalSynthesis Lectures on Power Electronics
Volume7
Issue number1
DOIs
StatePublished - 2020

Keywords

  • PV inverters
  • PV topology optimization
  • computer vision in PV
  • deep learning
  • graph signal processing
  • machine learning
  • neural networks
  • photovoltaic systems
  • smart grid
  • solar array fault detection
  • solar panel shading

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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