Abstract
The explosive growth of wind power is accompanied with the problem of disorderly construction, which is difficult to take into consideration in planning stage and would lead to high cost of power grid expansion. To cope with the uncertainty of wind power construction, this paper proposed a coordinated flexible planning method based on the bi-level optimization model. A probabilistic method is used to analyze uncertainty of wind power. Considering variable flexible resources from generation, grid, demand side and energy storage, a bi-level optimization model is built for planning, with the upper layer making investment decisions considering both wind accommodation benefit and economic cost and lower layer simulating operation status in detail and maximizing flexibility supply. A maximum net benefit/increment ratio method is used to solve the model, basing on the unified evaluation indicator of different flexible resources. Case study shows that the bi-level model and the planning method can take wind power construction uncertainty into consideration and obtain an economic and credible planning result, thus achieving efficient accommodation of renewable energy.
Published Version
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