Optimal Purchasing Strategy for Inter-Provincial Renewable Energy Dealers Under Considering Electricity Purchasing Risk
ieee conference energy internet and energy system integration(2020)
摘要
With the implementation of China's renewable portfolio standard(RPS), the positive externalities of renewable energy will be fully reflected. And inter-provincial renewable energy transactions will become an important way for provinces without sufficient renewable energy output to complete the assessment of consumption responsibility. The key issue is that inter-provincial renewable energy dealers can act as agents for market entities in the province to purchase renewable energy from other provinces. Therefore, based on the two-level electricity market and using the conditional value-at-risk(CVaR) method, this paper establishes a nonlinear bilevel optimization model that considers the risk of electricity purchase, and then introduces the risk aversion coefficient to transform the upper-level multi-objective problem into a single-objective problem, using Karush-Kuhn-Tucker(KKT) conditions and Lagrange duality theory to convert the above bilevel nonlinear problem into a single-layer linear problem for solution. The case studies show the effectiveness of the model and the reduction of market operating costs.
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关键词
renewable portfolio standard,conditional value-at-risk,two-level market,bilevel optimization
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