考虑低碳排放与需求侧管理的配电网扩展规划

Distribution network expansion planning considering low-carbon emissions and demand side management

在配电网扩展规划中考虑需求侧管理对提升分布式电源(distributed generation,DG)接纳、确保系统安全经济运行具有重要意义。针对现有配电网扩展规划方法尚未充分考虑碳排放影响的问题,提出一种考虑低碳排放与需求侧管理的配电网扩展规划。首先,基于碳排放流理论的动态碳排放强度建立配电网碳交易成本计量模型,继而提出考虑低碳的需求侧管理策略。而后,建立考虑碳交易与需求侧管理的配电网规划-运行双层优化模型:规划层以年综合成本最小为目标,决策线路、DG、储能(energy storage system,ESS)的配置方案;运行层以系统运行成本最小为目标,制定配电网在典型日场景下的最优运行策略。最后,基于改进型IEEE 33节点配电网的仿真测算表明,考虑低碳需求侧管理后的配电网扩展规划方案的经济成本下降2.0%,碳排放减少8.8%,验证了方法的有效性与优越性。

In the process of distribution network planning,considering the demand side management can increase the acceptance of distributed generation(DG)and improve the system economy.Aiming at the problem that demand side management does not consider the impact of carbon emissions in the planning model,a distribution network expansion planning method considering low-carbon emissions and demand side management is proposed.Firstly,a carbon trading cost measurement model for the distribution network is established based on the dynamic carbon emission intensity derived from the carbon emission flow theory.Subsequently,a low-carbon demand-side management strategy is proposed.Thereafter,a bi-level optimization model for distribution network planning and operation,considering carbon trading and demand-side management,is developed.In the planning layer,the objective is to minimize the annual comprehensive cost by determining the optimal configuration of lines,DG,and energy storage.In the operation layer,the goal is to minimize the system's operational costs by formulating the optimal operational strategy for the distribution network under typical daily scenarios.Finally,simulation and calculation based on the modified IEEE 33-bus distribution network demonstrate that the expansion planning scheme for the distribution network,which considers lowcarbon demand-side management,reduces economic costs by 2.0%and carbon emissions by 8.8%.This validates the effectiveness and superiority of the proposed method.