计及负荷需求响应的电力现货市场均衡研究

Research on the Impacts of Demand Response on Power Spot Market Equilibrium

在电力现货市场逐渐深入推进的大环境下,提出一种以节点电价作为定价机制的考虑需求响应的电力现货市场均衡模型,该模型融入价格型负荷需求响应以优化次日各节点负荷曲线,提升电力系统运行效率。在负荷侧引入用电不满意度的概念,综合优化各节点负荷的购电成本与用电不满意度。此外,由于日前电能市场出清SCED模型中运行成本目标是与发电机组申报价格有关的多段线性函数,因此引入整数变量对其进行线性化处理。最后,通过对IEEE39节点的算例仿真,验证了电力现货市场均衡模型的有效性,并详细分析了参与需求响应容量大小对负荷需求响应的影响程度和线路传输功率限制对节点电价的影响。

In the context of the power spot market, an equilibrium model of power spot market based on locational marginal price is proposed in this paper. Firstly, the SCED model for market clearing ahead of day is established. Because the operation cost target in the power market is Multi-segment linear function, integer variables are introduced in order to achieve the linearization of the model. Afterwards, Lagrange multipliers of corresponding power flow equations in the model are used as the nodal price. In addition, the concept of electrical dissatisfaction is introduced on the load side. For each node load, a load response model is presented based on the goal reducing electricity cost and electrical dissatisfaction. Finally, the effectiveness of the power spot market equilibrium model is verified through the simulation of IEEE39 nodes, and the effect of the transmission power limit on the nodal price and the influence of the capacity of participating demand on the response of load are analyzed in detail in the paper.