Review of Ground Insulation Resistance Detection Methods for Photovoltaic (PV) Systems

With the rapid growth of PV systems, accurate detection of insulation resistance in PV inverters has become increasingly crucial to ensure system safety and operational stability. This paper presents a systematic review of current ground insulation resistance detection methods for PV systems. First, the operating principles of various insulation resistance detection schemes are reviewed. Furthermore, the performance of these methods is evaluated based on several key metrics. Additionally, various fault locating techniques are examined. Overall, this paper aims to provide a comprehensive overview of the latest advancements in insulation resistance detection for PV systems.