电力市场混合竞价模式及其出清算法

A Mixed Bidding Mode and Its Clearing Algorithm for Electricity Market Applications

提出了一种电力市场混合竞价模式。该模式将负荷曲线分为基础负荷与波动负荷两部分,基础负荷采用分段竞价进行出清,波动负荷部分采用分时竞价进行出清。对此建立了电力市场混合竞价的数学模型,解决了分段竞价模式处理分时段约束的困难,提高了市场出清结果的可行性。分析了市场分界线对出清结果的影响,提出分段市场与分时市场的划分要根据系统约束的满足情况来动态优化调整。对现有的2种结算方式进行了分析比较,确定了在混合竞价机制下基础负荷部分的分段竞价市场采用全网边际电价进行统一结算,波动负荷部分的分时竞价市场则按各个机组报价分别进行结算。IEEE 30节点算例验证了所提竞价模式和算法的有效性和可行性。

A new mixed bidding mode for electricity market is proposed.In this mode,the load curve is divided into two parts including basic load part and fluctuating load part.The basic load part adopts the block bidding mode,and the fluctuating load part adopts the hourly bidding mode,so that not only a series of advantages of block bidding are preserved,but also the difficulties of dealing with constraints related to time periods of the block bidding are overcome.The optimization model of the mixed bidding mode is established to increase the feasibility of market clearing results.The boundary of block bidding market and hourly bidding market is determined by dynamic optimization adjustment according to system constraints,as well as minimizing the power purchasing cost.By comparing and analyzing the current two settlement methods,the unified marginal price clearing mechanism is adopted in the basic load part of the block bidding market for settlement,and the pay as bid mechanism is adopted in the hourly bidding market for settlement.An example of IEEE 30-bus system validates that the bidding mode and algorithm proposed are certainly feasible and practical.