区块链技术下考虑风电不确定性的微网群鲁棒博弈交易模式

微网群电能交易可以提高多微网系统整体经济性,促进可再生能源消纳并缓解配电网运行压力。然而风电出力不确定性严重影响了单个微网运行调控行为,进而影响微网群电能交易的经济性和可靠性。同时,可再生能源出力不确定性和微网群规模的扩大使传统集中式交易模式在处理微网群电能交易产生的海量、复杂、实时的微网数据时,存在交易信息不透明、可靠性低等问题。因此,考虑风电出力不确定性,引入具备数据透明性和可靠性的区块链技术,提出区块链技术下的多微网电能交易两阶段鲁棒博弈竞标调度模型。首先,对区块链技术与多微网电能交易非合作博弈模型的契合度进行分析,并给出基于区块链技术的多微网电能交易架构;其次,采用两阶段可调鲁棒优化模型和非合作博弈理论构建多微网鲁棒博弈竞标调度模型;再次,采用二进制扩充法、对偶理论、大M法、列和约束生成(column and constraint generation,C&CG)算法对该模型进行求解,得到各个微网的最优经济调度策略以及竞标策略;最后,通过算例验证了所提方法可以实现多微网系统分布式交易,提高整体经济性,并有效应对风电出力不确定性。

Robust Game Transaction Model of Multi-microgrid System Applying Blockchain Technology Considering Wind Power Uncertainty

Electricity transaction of multi-microgrid system enables to improve the overall economy, alleviate the operating pressure of distribution network and promote the consumption of renewable energy. Nevertheless, the transactions of multi-microgrid system are obliged to process large-scale, complex structure, and highly real-time data of microgrid. Therefore, taking the uncertainty of wind power output into consideration, this paper puts forward a robust game bidding scheduling model for multi-microgrid system applying blockchain technology with data transparency and reliability. Firstly, the compatibility between the blockchain technology and the non-cooperative game model of multi-microgrid electricity transaction is analyzed. And then the paper establishes a multi-microgrid transaction architecture based on blockchain technology. Binary expansion method, duality theory, big M method, and C&CG algorithm are employed to achieve the optimal economic dispatch strategy and bidding strategy of each microgrid. Finally, the paper builds a transaction platform based on blockchain technology, and the corresponding case studies verify the effectiveness of the proposed method.