NEW APPROACH TO ANALYZING LONGTERM PERFORMANCE OF LARGE POPULATIONS OF PV SYSTEMS IN FIT MARKETS WITH MINIMAL EFFORTS AND COSTS - CASE STUDY SWITZERLAND: DEVELOPMENT, IMPLEMENTATION AND APPLICATION, ANALYSIS AND FIRST RESULTS

摘要

Longterm and standardized performance monitoring of PV plants is essential for future PV deployment. The value of performance monitoring is widely underestimated and lack of willingness to share operational data make it difficult to obtain reliable project data. IEA PVPS T13 maintains a performance database with predefined and standardized performance analysis. In this work, a new approach to assessing and analyzing performance data of large populations of PV plants is developed, using existing yield data from Feed-in-Tarif (FiT) databases in combination with calculated solar irradiation values based on measured hourly solar irradiation data. This approach is applied exemplary to the Swiss PV market, producing 1'170 PV projects for performance analysis and confirming the potential to monitor large amounts of PV projects in all countries with FiT. The number of entries in the IEA PVPS performance database over all countries can be doubled with the assessed Swiss PV projects of this work. First findings confirm average PR of 0.75, differences in performance between small and large PV plants in the range of 2...5% and around 6.8% higher average specific yield than assumed in FiT models.