发电技术2025，Vol.46Issue(2)：274-283,10.DOI:10.12096/j.2096-4528.pgt.24118
面向综合能源系统运行的气网聚合建模及辨识方法
Gas Network Aggregate Modeling and Identification Method for Integrated Energy System Operation
摘要
Abstract
[Objectives]Natural gas networks are important components of integrated energy systems,which can provide considerable flexibility for the operation of the integrated energy system.Developing an accurate gas network model is the foundation for the operation and control of integrated energy systems.However,existing mechanism models for gas networks show high complexity,with certain parameters being unidentifiable in practical engineering applications.Therefore,this study proposes a gas network aggregate modeling and identification method specifically for integrated energy system operation.[Methods]Taking the gas network as the research object,the concept of the gas network aggregate model is proposed,its formula is derived,and a corresponding offline parameter estimation method is designed.Since the derivation of the gas network aggregate model depends on specific operating conditions,the model parameters vary with condition changes,leading to non-negligible errors in the offline estimation model.To address this issue,a rolling calibration method based on forgetting factor recursive least squares is proposed.[Results]Under small gas flow variations,the offline parameter estimation method demonstrates satisfactory accuracy.However,under rapid flow variations,the offline estimation fails to accurately describe the operation status of the gas network,and rolling calibration can achieve accurate fitting of the model.[Conclusions]The proposed gas network aggregate model integrating offline estimation and online rolling calibration can provide a practical and efficient fluid network modeling solution for the operation analysis and control of integrated energy systems.关键词
天然气/综合能源系统/新能源消纳/气网/聚合模型/参数估计/在线校正Key words
natural gas/integrated energy system/new energy consumption/gas network/aggregate model/parameter estimation/online calibration分类
能源与动力引用本文复制引用
孙勇,高子航,侯泽胤,李德鑫,王尧,张海锋,陆帅..面向综合能源系统运行的气网聚合建模及辨识方法[J].发电技术,2025,46(2):274-283,10.基金项目
国家重点研发计划项目(2022YFB2404000).Project Supported by National Key Research&Development Program of China(2022YFB2404000). （2022YFB2404000）
