基于分布式算法的含微电网电力供应侧市场均衡分析

考虑微电网参与配电侧电力市场投标竞争,并引入一个中间商来实现日前批发市场与配电侧电力市场之间的电力交易.基于该市场交易架构,建立了微电网参与投标竞争的电力市场供应函数均衡模型.然后将该均衡模型转化为凸优化问题,在理论上证明了解的存在性和唯一性,并考虑到实际电力市场中信息的不对称性,采用分布式优化算法进行求解.最后通过算例验证了该均衡模型和求解方法的有效性,表明在微电网参与的配电侧电力市场和日前批发市场之间引入中间商,会平滑日前批发市场电价的激烈变化,缓解市场力滥用行为,有助于整个电力市场的高效平稳运行.

Equilibrium analysis of supply-side electricity market with microgrids bidding based on distributed algorithm

A market trading framework is introduced that microgrids bid in a distribution electricity market, and an intermediate agent is presented to buy and sell electricity between the distribution electricity market and the day-ahead wholesale market. Based on this market trading framework, a supply function equilibrium model of electricity markets with microgrids bidding is proposed. The equilibrium problem is solved by converting into convex optimization problems, and the existence and uniqueness of the Nash equilibrium is theoretically proved. In addition, considering the information asymmetry in practical application, a distributed algorithm is further proposed to find the equilibrium outcomes. Finally, numerical examples are presented to verify the effectiveness of the proposed model and algorithm. It is shown that the introduction of the intermediate agent can smooth the sharp changes of the day-ahead wholesale market prices and mitigate the market power abuse, thus can be conducive to the efficient and smooth operation of the whole electricity market.