동서형 태양광의 경사각 및 설치형태에 따른 발전특성과 피크 분산효과 실증 분석
Empirical Analysis of Power Generation and Peak-Dispersion Characteristics of East-West Oriented PV Systems
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The rapid expansion of photovoltaic (PV) deployment in Korea has intensified the midday generation peak associated with conventional south-facing fixed-tilt systems, contributing to an increase in curtailment events and greater stress on the power grid. East-West (EW) PV configurations have drawn attention as a potential mitigation strategy; however, empirical performance evaluations considering different tilt angles and installation types remain limited. This study analyzed the power generation characteristics and peak-dispersion performance of EW-oriented PV systems installed on an industrial gable roof and a flat-slab rooftop. An eight-month field experiment was conducted from April to November 2025 using a south-facing fixed-tilt system as a reference. Three EW configurations were tested: an 11° dual-slope system on the gable roof and 20° dual-slope and 90° vertical systems on the flat slab. The analysis focused on the monthly energy yield, capacity factor, peak-dispersion behavior, and ground coverage ratio, with particular emphasis on whether EW systems can alleviate the grid burden during hours when curtailment is typically enforced. Results showed that all EW configurations exhibited a noticeable reduction in the midday generation peak compared with that of the south-facing reference. This peak-flattening effect effectively suppressed excessive output during curtailment-prone hours, demonstrating the structural advantages of EW-oriented PV systems in reducing grid stress and lowering the likelihood of curtailment.
Abstract
The rapid expansion of photovoltaic (PV) deployment in Korea has intensified the midday generation peak associated with conventional south-facing fixed-tilt systems, contributing to an increase in curtailment events and greater stress on the power grid. East-West (EW) PV configurations have drawn attention as a potential mitigation strategy; however, empirical performance evaluations considering different tilt angles and installation types remain limited. This study analyzed the power generation characteristics and peak-dispersion performance of EW-oriented PV systems installed on an industrial gable roof and a flat-slab rooftop. An eight-month field experiment was conducted from April to November 2025 using a south-facing fixed-tilt system as a reference. Three EW configurations were tested: an 11° dual-slope system on the gable roof and 20° dual-slope and 90° vertical systems on the flat slab. The analysis focused on the monthly energy yield, capacity factor, peak-dispersion behavior, and ground coverage ratio, with particular emphasis on whether EW systems can alleviate the grid burden during hours when curtailment is typically enforced. Results showed that all EW configurations exhibited a noticeable reduction in the midday generation peak compared with that of the south-facing reference. This peak-flattening effect effectively suppressed excessive output during curtailment-prone hours, demonstrating the structural advantages of EW-oriented PV systems in reducing grid stress and lowering the likelihood of curtailment.