考虑气压静态稳定极限的电气综合能源系统气压薄弱节点的灵敏度辨识方法  被引量:1

Sensitivity Identification Method for Gas Pressure Weak Line of Integrated Electricity-Gas System Considering Static Gas Pressure Stability Limit

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作  者:倪筹帷 赵波 林达 郭向伟 刘志彬[2] 穆云飞[2] NI Chouwei;ZHAO Bo;LIN Da;GUO Xiangwei;LIU Zhibin;MU Yunfei(Electric Power Research Institute of State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310014,China;Key Laboratory of Smart Grid of Ministry of Education(Tianjin University),Tianjin 300072,China)

机构地区:[1]国网浙江省电力有限公司电力科学研究院,杭州市310014 [2]智能电网教育部重点实验室(天津大学),天津市300072

出  处:《电力建设》2023年第3期105-112,共8页Electric Power Construction

基  金:国网浙江省电力公司科技项目“高维多能流系统弹性分析与优化建模求解技术研究”(2021ZK21)。

摘  要:在电气综合能源系统(integrated electricity-gas system, IEGS)中,电、气负荷的持续增长除引发电力系统的电压失稳外,还会引发天然气系统的气压骤降,造成气压失稳,进而影响IEGS整体的安全稳定运行。因此,亟需研究电、气负荷增长对于IEGS中气压的影响。首先借鉴电力系统静态灵敏度分析的思想,基于统一IEGS多能流模型,分别构建天然气系统气压-有功负荷与天然气系统气压-气负荷灵敏度矩阵;在此基础上,引入连续多能流模型计算在静态气压稳定临界状态下的IEGS气压-总负荷灵敏度指标,并依此定位IEGS中气压薄弱环节。最后,通过算例分析,验证所提方法在辨识IEGS气压薄弱环节的有效性。In an integrated electricity-gas system(IEGS), the rapid growth in power and gas load has led to not only the voltage instability in power system, but also gas pressure drops in natural gas system. It further results in the instability in gas pressure and makes an impact on the security and stability of IEGS. Thus, it is necessary to find how power and gas load growth influences the gas pressure in IEGS. Draw on the idea of power system static sensitivity analysis and on the basis of the unified IEGS multi-energy flow model, this paper constructs two sensitivity matrixes for gas pressure-active load and gas pressure-gas load. The continuous multi-energy flow model is then used to calculate the sensitivity index of gas pressure-total load when the IEGS reaches the stability limit of gas pressure. The weak line of gas-pressure in IEGS can be located according to the index. Finally, results of a case study show the effectiveness of the proposed method in locating the gas pressure weak line of the IEGS.

关 键 词:电-气综合能源系统(IEGS) 连续多能流 气压-总负荷灵敏度 薄弱环节识别 

分 类 号:TM73[电气工程—电力系统及自动化]

 

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