太阳能光热发电并网的综合效益量化评估方法

Comprehensive Benefit Analytical Evaluation of Gird-connected Concentrating Solar Power

构建新型电力系统,是实现“双碳”目标的关键抓手。强随机性与低惯量特性将成为新型电力系统的重要特征。相比风电、光伏发电技术,太阳能光热发电技术集成太阳能利用、旋转同步发电机与高性价比的大容量储热为一体,是具有灵活调节能力与旋转惯量支撑的清洁发电技术,可在电力系统中承担与火电相似的“压舱石”角色。当前,光热发电的技术成本相对较高,灵活效益与惯量效益等亟待全面综合评估。该文从能量效益、灵活性效益、惯量效益以及碳减排效益4个方面分析了光热发电在高比例可再生能源电力系统中的综合效益,并提出了解析化的综合效益定量评估模型与方法。算例结果表明,相比于仅考虑能量效益,综合效益提高了41.27%。

In the context of carbon peaking and carbon neutrality target,the large-scale renewable energy is integrated into the power system,so that strong uncertainty and low inertia will be the key features of the new-type power system.Compared with wind power and photovoltaic,concentrating solar power(CSP),a clean power generation technology with flexible regulation capability and inertia support,is both equipped with the synchronous unit and cost-effective large-capacity thermal energy storage,and can put the power system on more solid footing.Currently,the technical cost of CSP is relatively high,and the flexible benefit and inertial benefit need to be comprehensively evaluated.In this paper,the comprehensive benefit of CSP in high renewable energy penetrated power systems is comprehensively evaluated from four aspects:energy benefits,flexibility benefits,inertia benefits and emission benefits,and the corresponding analytical quantitative evaluation model and method are proposed.The results show that compared with the single consideration of the energy benefits,the comprehensive benefit of the CSP is increased by 41.27%.