Power grid enterprises are faced with a serious mismatch between limited investment capacity and numerous investment projects. How to accurately match the weak links with investment projects according to the power system diagnosis is the key to improve investment accuracy. On the basis of a investment-oriented label, a project portfolio optimization framework with coherent diagnosis–evaluation–optimization is proposed in this study. First, a two-layer index system for investment benefit evaluation is established, which considers unit investment efficiency and macro investment benefit. Second, weighing the diagnosis results of power grid and the biased investment environment, the benefit evaluation of the project is implemented as the basis of project portfolio optimization. To meet different investment demands, two combination optimization models of maximizing investment benefit and minimizing investment cost are established considering the benefit coupling relationship and time series relationship between projects. Last, a case study is conducted for a regional distribution network. The proposed framework has been proven to be able to effectively cope with different investment needs and realize the dynamic adjustment of the scheme in the whole investment cycle.

中文翻译：

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具有投资能力和项目关联约束的配电网最优投资决策

电网企业面临着投资能力有限、投资项目众多的严重错配问题。如何根据电力系统诊断将薄弱环节与投资项目准确匹配，是提高投资准确性的关键。本研究在投资导向标签的基础上，提出了一种诊断-评估-优化相结合的项目组合优化框架。首先，建立投资效益评价两层指标体系，综合考虑单位投资效率和宏观投资效益。其次，权衡电网诊断结果和偏向投资环境，实施项目效益评价，作为项目组合优化的依据。满足不同的投资需求，考虑项目间的收益耦合关系和时间序列关系，建立了投资收益最大化和投资成本最小化两种组合优化模型。最后，对区域分销网络进行了案例研究。所提出的框架已被证明能够有效应对不同的投资需求，实现方案在整个投资周期内的动态调整。