考虑边际碳排放因子的配电网日前日内优化调度策略OA

[Objective]To address the dual requirements of low-carbon transformation and economic operation in power systems,this study aims to leverage the low-carbon demand response capability on the load side and enhance the flexibility of"source-grid-load-storage"regulation.A day-ahead and intraday optimal dispatch strategy based on marginal carbon intensity(MCI)is proposed.[Methods]First,a source-grid-load-storage dispatch framework for distribution network is established,considering time-of-use(TOU)pricing and MCI.An analytical expression for multi-scenario MCIs is derived,and a congestion matrix is introduced to analyze the impacts of marginal unit commitment and line congestion on MCIs at various grid nodes.Second,with overall operational economy and environmental sustainability as the primary objectives,a day-ahead and intraday optimal dispatch model is formulated,comprehensively accounting for three types of demand response constraints.Finally,case studies based on the IEEE 33-node system are conducted to analyze the spatiotemporal characteristics of MCIs and validate the effectiveness and superiority of the proposed dispatch method.[Results]The case analysis demonstrates that the proposed MCI calculation method effectively quantifies the influences of marginal unit commitment and line congestion on MCIs,while the demand response mechanism deeply exploits the low-carbon demand response capability on the load side.Compared with traditional low-carbon demand response approaches,the proposed strategy reduces total grid carbon emissions by 4.9%and decreases total operational cost by 1.32%.[Conclusions]Compared with static and dynamic carbon emission factors,the proposed MCI-based dispatch strategy enhances the dispatching accuracy of low-carbon demand response on the load side and improves the low-carbon economic operation level of distribution networks.