科研之友
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摘要
Aiming at the significant zoning characteristics of flexible distribution network and the uncertainty characteristics of photovoltaic output，a method of inter-regional distributed optimization and intra-regional two-stage optimization is proposed，and the distributionally robust optimization configuration model of photovoltaic-energy storage coordination based on adaptive step size alternating direction method of multipliers（ADMM）is established. Based on the coupled branch method，the flexible interconnection devices are decoupled，the boundary conditions among regions are coordinated through consistency constraints，and the global iterative distributed optimization is realized by using the adaptive step size ADMM. In order to minimize the total cost of investment and operation of flexible distribution network，the data-driven-based two-stage distributionally robust optimization model of each sub-region is established with the minimum total investment and operation cost of flexible distribution network as the optimization objective，and an AC／DC hybrid convex relaxation method is proposed to deal with the nonlinear non-convex model for quick solution. Based on the improved relative entropy，the uncertain probability distribution fuzzy sets of typical photovoltaic output scenarios are constructed and the two-stage distributionally robust optimization model is solved by using the column and constraint generation algorithm. An improved actual 293-bus flexible distribution network is used as the example to verify the effectiveness of the proposed model. ? 2023 Electric Power Automation Equipment Press.
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