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With the increasing demand worldwide for power grid interconnection, a growing number of related projects are under planning or construction. Despite the rapid growth of cross-border interconnection projects, the systematic research on profit models for these projects is insufficient. This paper first analyzes the profit sources of interconnection projects. Based on the analysis results, profit models are considered under different regulatory systems for three types of crossborder interconnection projects: fully market-oriented, semi-marketization, and fully supervised. Finally, measures for increasing the profitability and sustainable development of power interconnection projects are proposed. Keywords: Profit model, Power interconnection, Regulatory system, Physical transmission rights, Financial transmission rights