光热发电商参与下的电力现货市场均衡分析

针对当前国内光热电站(concentrating solar power,CSP)参与电力市场交易程度低,市场相关运营研究尚属空白。文章考虑光热发电商作为市场承载主体,面向电力现货市场交易,在解析其内部“光、热、电”能流特征基础上,构建了以热能为能量中枢的光热电站运行模型;然后,以光热发电商售电收益最大为目标,建立了基于多寡头古诺模型的市场交易决策模型,并给出了其非线性互补方法求解过程;最后,以国内某实际光热电站为参考,在3类典型日场景中对其参与电力市场交易进行了实例模拟。结果表明:因其优良的出力稳定特性,光热发电较传统光伏发电,市场竞争能力有显著提升,很大程度上可以弥补其在容量成本上的不足;光热发电的富余热量,能更好地满足电热耦合系统的需求,替代热电联产环节,降低了运行成本,满足了未来综合能源系统发展需求。

Analysis of the Equilibrium of Electricity Spot Market with the Participation of CSP

In view of the low degree of participation in electricity market transactions of concentrating solar power (CSP) in China, market-related operation research is still blank. This paper considers CSP as the main body of the market and is aimed at the electricity spot market transaction. According to the analysis of its internal“light, heat, and electricity”energy flow characteristics, an operation model of a CSP station with thermal energy as the energy center is constructed. Then, with the goal of maximizing the electricity sales revenue of CSP, a market transaction decision model based on the multi-oligarch Cournot model is constructed, and the solution process of its nonlinear complementary method is given. Finally, taking an actual CSP station as a reference, in three typical daily scenarios, an example simulation of CSP participating in electricity market transactions is carried out. The results show that: due to its excellent stable output, compared with traditional PV, CSP has a significant improvement in market competitiveness, which can largely make up for its lack of capacity cost. The surplus heat of CSP can better satisfy the demand for electro-thermal coupling system, replace cogeneration links, reduce operating costs, and meet the development needs of the integrated energy system in the future.