A Study on a Method for Calculating Behind-the-Meter Photovoltaic Generation Considering Regional Generation Patterns

Renewable energy facilities are expanding globally, with photovoltaic (PV) systems rapidly increasing in South Korea. As PV systems grow, behind-the-meter (BTM) PV without real-time metering continues to expand, creating significant challenges for power system operation and forecasting. This study proposes a method to calculate BTM PV generation using market-traded PV performance and energy storage systems (ESS) charge/discharge power. By allocating ESS charge/discharge power regionally, the approach more realistically identifies BTM PV generation reflecting regional differences in generation characteristics. The analysis reflects regional generation characteristics more effectively compared to nationwide uniform approaches. This is expected to contribute to efficient and accurate power system operation and long-term planning in a power system environment where the proportion of BTM PV continues to increase.