多微网协同互联能够提高系统运行的稳定性与可靠性.针对多微网(multi-microgrids,MMG)系统合作运行过程中由于各微网分属于不同的利益主体而产生的微电网之间的电能交易问题、碳交易问题与利益分配问题,提出一种计及电-碳交易与综合贡献率的多微网合作运行优化策略.首先,分析了含点对点(peer-to-peer,P2P)电-碳交易的多微网合作运行架构,并引入碳捕集系统(carbon capture system,CCS)与电转气(power to gas,P2G)装置,建立了微电网系统及设备模型.其次,在单微网模型构建之后,基于纳什议价理论,构建了含P2P电-碳交易的多微网系统合作运行模型,并将非凸非线性的纳什议价问题转化为易于求解的MMG合作成本最小化与支付收益最大化两个子问题.然后,在合作后的利益分配过程中,量化各微电网对MMG的综合贡献程度并计算出各自的综合贡献率,通过综合贡献率来分配各微网的收益.最后,采用交替方向乘子法(alternating direction multiplier method,ADMM)求解,有效保护了各微网隐私.算例分析与方案对比结果表明,所提策略能够实现微网间的P2P电-碳交易,有效降低MMG总运行成本,减少系统的碳排放量,并且采用的利益分配策略公平合理,能够有效提升各微网参与合作运行的积极性.
Cooperative interconnection of multi-microgrids(MMG)can enhance the stability and reliability of system operation.This paper proposes an optimization strategy for the cooperative operation of MMG,considering electricity and carbon trading,as well as the issues of energy trading,carbon trading,and profit distribution among microgrids,which belong to different stakeholders.Firstly,the architecture of MMG cooperative operation involving peer-to-peer(P2P)electricity and carbon trading is analyzed.Carbon capture system(CCS)and power-to-gas(P2G)devices are introduced,and microgrid system and equipment models are established.Secondly,after the construction of the microgrid model,based on the Nash bargaining theory,a cooperative operation model for MMG with P2P electricity and carbon trading is constructed,and the non-convex and non-linear Nash bargaining problem is transformed into two sub-problems of minimizing cooperative costs and maximizing payment benefits for easier resolution.Then,in the benefit distribution process after cooperation,the comprehensive contribution rates of individual microgrids to the MMG are quantified and calculated based on their overall contribution levels.These rates are used to allocate the profits of each microgrid.Finally,the alternating direction multiplier method(ADMM)is employed to solve the model,effectively protecting the privacy of each microgrid.Comparative analysis and case studies demonstrate that the proposed strategy enables P2P electricity and carbon trading between microgrids,effectively reduces the total operational costs of MMG,decreases carbon emissions,and ensures a fair and reasonable profit distribution strategy,thereby enhancing the enthusiasm of microgrids to participate in cooperative operations.
万方数据
维普
