| Title |
Empirical Performance Comparison of PV System With and Without Optimizer |
| Authors |
모영규(Young-Kyu Mo) ; 전혜련(Hye-Ryeon Jeon) ; 김유나(You-Na Kim) ; 황민(Min Hwang) ; 우필성(Pil-Sung Woo) ; 김영석(Young-Seok Kim) |
| DOI |
https://doi.org/10.5370/KIEE.2025.74.12.2426 |
| Keywords |
PV Energy Yield; Optimizer; String Mismatch; Empirical Analysis; Performance Comparison |
| Abstract |
This study aims to empirically analyze the impact of optimizer application on photovoltaic (PV) energy yield under identical environmental conditions. The analysis was conducted using a 400kW Phase 2 demonstration facility installed at the Renewable Energy-Linked ESS Safety Evaluation Center. Comparative experiments were performed by configuring optimizer-applied systems (6-1, 7-1) and non-applied systems (6-2, 7-2) using the same module manufacturers (Manufacturer A and B). The test systems were based on four 50kW inverters, with series-parallel configurations reflecting real-world installations. Energy yield was compared based on the cumulative MPPT-level output under equivalent irradiance conditions. In addition, time-series current data and string-level mismatch characteristics were examined. The findings of this study provide empirical evidence on the effectiveness of optimizers, serving as a foundational reference for PV system designers considering their application. |