Power system flexibility quantitative evaluation based on improved universal generating function method: A case study of Zhangjiakou. (15th August 2020)

• Record Type: Journal Article
• Authors: Guo, Zheyu; Zheng, Yanan; Li, Gengyin
• Is Part Of: Energy. Volume 205(2020)
• Publication Date: 2020-08-15
• Subjects: Renewable energy -- Flexibility promotion -- Probabilistic production simulation -- Universal generating function; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2020.117963
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: Power system flexibility is the fundamental factor affecting renewable energy curtailment problem, and proposing a flexibility quantitative evaluation method becomes crucial for development of renewable energy. As the only renewable energy demonstration region in China, Zhangjiakou is facing serious renewable energy curtailment problems, and it is of great significance to explore a suitable flexibility promotion path. In this paper, the uncertainty model for each main component in generation-grid-load-energy storage is built, and combined with these models, the production simulation method based on improved universal generating function is introduced as the flexibility evaluation tool and flexibility metrics are proposed based on flexibility definition and physical mechanism. The effectiveness of the method is verified in IEEE RTS-79 and flexibility promotion path in Zhangjiakou is also studied. The results show that retrofit of coal-fire unit is the priority measure, then the flexible grid connection and implementation of demand response, and construction of energy storage is the final measure. Highlights: Multi-state probabilistic models of main components in power system are built. A novel production simulation method is used for flexibility evaluation. Flexibility metrics are proposed to analyze various flexibility promotion measures. Flexibility promotion path for Zhangjiakou is put forward.