Analysis and Tool Development of Interconnection Power Flow in Korea’s Future Power System Using the DC Power Flow Calculation

Countries worldwide are announcing carbon reduction targets as part of their environmental policies. Similarly, in Korea, sector-specific carbon reduction plans have been announced to achieve carbon neutrality by 2050. In the transition sector, goals have been set for power generation based on renewable energy sources. However, due to the distant timeframe of 2050, there is a possibility of changes in the composition goals of power sources based on government policies and technological trends. Consequently, frequent scenario reviews are required to formulate new plans accordingly. In this regard, there is a need for a relatively concise and rapid analysis method and tool to structure and analyze data concerning the uncertain long-term future composition of power sources. However, the power system analysis tool PSS/E, which is utilized by Korea Electric Power Corporation, involves considerable work time for data stabilization for interpretation. Therefore, this paper introduces an interarea power flow analysis tool based on DC power flow calculation, developed for quick and efficient analysis of active power flow. It demonstrates its capability to swiftly analyze various generation composition scenarios, contributing to long-term system planning. Furthermore, the accuracy of the development tool was confirmed through detailed comparative analysis using PSS/E. The case study was conducted targeting the 2050 carbon-neutral power system and describes the analysis results.