Optimal scheduling method for electricity-gas interconnected system considering multi-time-scale flexibility

Autor: SUN Yifan, XU Ziyun, WANG Lin
Jazyk: čínština
Rok vydání: 2023
Předmět:
Zdroj: Zhejiang dianli, Vol 42, Iss 7, Pp 9-17 (2023)
Druh dokumentu: article
ISSN: 1007-1881
DOI: 10.19585/j.zjdl.202307002
Popis: The electricity-gas interconnected system includes the electricity and gas subsystems. It has a variety of energy coupling and storage devices with obvious differences in operation. And with the access of new energy power generation, the flexible and coordinated operation of the system is challenged. In this regard, an optimal scheduling method for integrated electricity-gas energy system using multiple time scales to call multiple types of resources is proposed. Firstly, a quasi-steady-state output model of energy equipment in the system is established. The proposed model takes the optimal daily operation cost of the system as the optimization goal, considers the different operation characteristics of energy sources and equipment, uses different time scales and step sizes to optimize the operation output of the power storage and other equipment, and dispatches different resources in the system in an orderly manner to fast track the fluctuations of the load and the new energy. Secondly, the random chance constraints are introduced to describe the remaining flexible resource supply capacity to improve the flexibility and robustness of the system. Finally, the distribution network and gas coupling system are used to conduct a case study to verify the effectiveness of the proposed method.
Databáze: Directory of Open Access Journals