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基于灵敏度分析的综合能源系统运行安全性的研究
陈厚合1, 张鹏1, 姜涛1, 李雪1, 邵俊岩1, 李国庆1, 王鹏宇2
1.东北电力大学 电气工程学院,吉林 吉林 132012;2.国网吉林省电力有限公司 长春供电公司,吉林 长春 130000
摘要:
基于电-气互联综合能源系统子系统间的灵敏度矩阵,探究了电-气能源子系统间的交互耦合机理,提出一种提升综合能源系统运行安全性的改善措施。首先构建电-气耦合的综合能源系统模型,采用基于扩展牛顿-拉夫逊法的交替求解法求解该综合能源系统的多能流方程;在此基础上,借助综合能源系统灵敏度分析方法计算电压幅值-燃气负荷灵敏度矩阵和天然气系统节点压力-电力系统节点有功灵敏度矩阵,定量描述电、气系统间交互耦合作用机理;然后,通过灵敏度矩阵辨识与薄弱节点密切相关的关键环节,研究提升综合能源系统运行安全性的相关措施。最后,通过IEEE 24节点和比利时20节点天然气系统耦合的IEGES-24系统算例对所提方法进行分析、验证,结果表明所提方法可应用于综合能源系统交互耦合机理揭示和运行安全性分析。
关键词:  综合能源系统  交替求解法  牛顿-拉夫逊法  灵敏度分析  安全性分析
DOI:10.16081/j.epae.201908013
分类号:TM711
基金项目:国家自然科学基金资助项目(51677022,51877033);国家重点研发计划资助项目(2017YFB0903400);吉林省综合能源系统创新团队资助项目(20180519015JH)
Security analysis based on sensitivity analysis for integrated electric and gas energy system
CHEN Houhe1, ZHANG Peng1, JIANG Tao1, LI Xue1, SHAO Junyan1, LI Guoqing1, WANG Pengyu2
1.Department of Electrical Engineering, Northeast Electric Power University, Jilin 132012, China;2.Changchun Power Supply Company, State Grid Jilin Electric Power Co.,Ltd., Changchun 130000, China
Abstract:
The interaction coupling mechanism among the subsystems in IEGES(Integrated Electric and Gas Energy System) is explored based on the sensitivity matrices between the electric power system and natural gas system in IEGES, and the measure to enhance the operational security of IEGES is proposed. Firstly, the IEGES model is established, and then alternating solution method based on extended Newton-Raphson method is adopted to solve the multi-energy flow equation of the IEGES. According to the solved multi-energy flow of the IEGES, the sensitivity analysis approach is adopted to calculate the voltage amplitude-gas load sensitivity matrix and the natural gas system node pressure-power system node active power sensitivity matrix to quantitatively describe the interaction coupling mechanism between the electricity and gas systems in IEGES. Further, the weak nodes of IEGES are identified by the sensitivity matrices, and the measure to enhance the operational security of IEGES is proposed. The performance of the proposed approach is evaluated by the IEGES-24 test system integrating IEEE 24-bus system and Belgian 20-node gas system. The results demonstrate that the proposed approach can be used to reveal the interaction coupling mechanism of IES(Integrated Energy System) and analyze the operational security.
Key words:  integrated energy system  alternating solution method  Newton-Raphson method  sensitivity analysis  security analysis

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