A recent report from the International Energy Agency (IEA) has found that machine learning algorithms and access to timely data are key to managing the increasing levels of solar PV in the energy grid.
The performance and reliability of PV electricity generation is becoming markedly more important, as the contribution of solar PV to overall electricity generation increases around the world, particularly in Australia.
Managing the influx of solar energy into the electricity grid requires a large amount of real-time data from PV suppliers, with a high level of predictability.
This requirement is particularly difficult to meet where there is a high percentage of PV generation from small rooftop systems, which are often not monitored.
In addition, large PV systems are not often equipped with the level of sophisticated performance monitoring that grid managers require.
Machine learning and other PV fault identification methods are comprehensively reviewed in a new IEA Photovoltaic Power System report, The Use of Advanced Algorithms in PV Failure Monitoring 2021.
The report provides an introduction to PV performance monitoring and a survey of fault detection algorithms and their applications.
The study found that the primary trends in PV system statistical performance monitoring are based on artificial intelligence (AI) principles.
The best results come from a machine learning training strategy that uses training data based on real-time testing data.
Dr Jonathan Dore from Ausgrid, formerly Head of Product Innovation at Solar Analytics, said, “This research provides a comprehensive analysis of failure detection methods, which can help identify underperforming systems, as the first step to rectifying faults.
“The scale of deployment of PV now provides a wealth of data almost unimaginable when the first solar systems were deployed.
“Such data volumes enable modern machine learning methods to compare systems to their own historical performance and to that of their neighbours, helping to discover anomalies or mild performance deficiencies that would have gone undetected in the past.”