凸包定价模式下的电力市场潜在市场力分析方法

Analysis Method for Potential Market Power of Electricity Market in Convex Hull Pricing Mode

机组开机成本导致其生产函数具有非凸、非连续等复杂结构特性,这使得传统仅针对实时电力市场设计的节点边际定价模式存在诸多市场漏洞。凸包定价模式(也称"拓展节点边际定价")通过给系统中的机组提供最低上调价格来克服生产函数复杂特性带来的挑战,并提高市场效率,但其凸包定价模式仍不完善。文中聚焦于凸包定价模式中的一个简化模型,分析市场参与者在简化模型中的潜在市场操纵行为以及操纵能力,并提出一种量化市场力的指标,这种指标在简化模型中具有超模性质。

The start-up cost of the unit causes its production function having complex structural characteristics such as non-convex and discontinuity, which makes the traditional locational marginal pricing mode designed only for the real-time electricity market have many market loopholes. The convex hull pricing mode(also known as extended locational marginal pricing) overcomes the challenges brought by the complex characteristics of the production function and improves market efficiency by providing the lowest uplift payment for the units in the system, but its convex hull pricing mode is still incomplete. The paper focuses on a simplified model in the convex hull pricing mode, analyzes the potential market manipulation behaviors and manipulation capabilities of market participants in the simplified model, and proposes an index to quantify market power, which is supermodular in the simplified model.