Presentation Details
A Systematic Review and Integrated Approach to Modeling of Aging Utility Scale PV Systems

Hanan Wehbi, Joseph Simon, Heather Mirletz, Jal Desai, Taylor Curtis, Garvin Heath, Matthew Prilliman, Brian Mirletz, Silvana Ovaitt, Chris Deline.

National Lab of the Rockies, Golden, CO, USA

Abstract


The growing deployment of utility-scale photovoltaic (PV) systems has increased the importance of techno-economic modeling operational photovoltaic (PV) systems for predicting energy yield, optimizing asset management, and informing financial decisions. Through a systematic review of literature and current industry practices, we review the different common modeling practices of a system’s configuration and age, performance and degradation, operation and maintenance (O&M), while also focusing on specific considerations for repowering, revamping, and decommissioning. Building on the synthesis, we develop a structured framework for techno-economic modeling of operating PV systems that integrate performance and degradation analysis, a decommissioning and repowering cost model that estimates the system’s end-of-life costs to reduce uncertainty quantifications and improve consistency across the sector. This research contributes to improved modeling methodologies and potentially to reduced financial performance requirements by providing practitioners with input resources and practical approaches to estimate performance, degradation, and costs associated with continued operation, revamping, repowering, or decommissioning decisions.

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