考虑天然气N-1的多能流系统静态安全耦合分析
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摘要
以综合能源系统为代表的多能流系统是推动低碳高能效能源转型的主要措施,但多种能流系统联合运行所带来的安全问题也不容忽视。该文针对多能流系统的静态安全问题,提出以天然气N?1事故作为预想事故集,研究适用于多能流系统的静态安全耦合分析理论和方法。提出考虑天然气管道N?1开断的预想事故集,并结合牛顿拉夫逊算法对开断事故进行模拟;利用标准矩阵模型分析能量枢纽在故障跨能流传播中起到的耦合机理;在静态安全耦合分析中以状态转移过程描述天然气管网的动态特性,评价故障的严重性,实现对关键事故和脆弱部位的识别。算例结果验证了所提理论和方法是正确有效的。
The multi-energy flow system represented by the integrated energy system is the main measure to promote the transformation of low-carbon and energy-efficient energy.However, the security problems caused by the joint operation of multiple energy flow systems should not be ignored. In view of the static security problem of multi-energy flow system, this paper proposed the natural gas N?1 event as the contingency set and discussed the static security coupling analysis theory and method for multi-energy flow systems. First, the contingency set considering the breaking of the natural gas pipeline N?1 was proposed. And the breaking event was simulated by the NewtonRaphson algorithm. Then the standard matrix model was used to analyze the coupling mechanism of energy hubs in the process of fault cross-energy flow propagation. Finally, the state transition process was used to describe the dynamic characteristics of the natural gas pipeline networks in static security coupling analysis and evaluated the severity of the impact of a fault on the operational safety of the system and enable identification of critical events and fragile parts. The results of the example verify that the proposed theory and method are correct and effective.
The multi-energy flow system represented by the integrated energy system is the main measure to promote the transformation of low-carbon and energy-efficient energy.However, the security problems caused by the joint operation of multiple energy flow systems should not be ignored. In view of the static security problem of multi-energy flow system, this paper proposed the natural gas N?1 event as the contingency set and discussed the static security coupling analysis theory and method for multi-energy flow systems. First, the contingency set considering the breaking of the natural gas pipeline N?1 was proposed. And the breaking event was simulated by the NewtonRaphson algorithm. Then the standard matrix model was used to analyze the coupling mechanism of energy hubs in the process of fault cross-energy flow propagation. Finally, the state transition process was used to describe the dynamic characteristics of the natural gas pipeline networks in static security coupling analysis and evaluated the severity of the impact of a fault on the operational safety of the system and enable identification of critical events and fragile parts. The results of the example verify that the proposed theory and method are correct and effective.
引文
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[2]Salimi M,Ghasemi H,Adelpour M,et al.Optimal planning of energy hubs in interconnected energy systems:a case study for natural gas and electricity[J].IET Generation,Transmission&Distribution,2015,9(8):695-707.
[3]马瑞,王京生.智慧社区多能流随机响应面模型预测控制方法[J].电力系统自动化,2018,42(4):121-127.Ma Rui,Wang Jingsheng.Model predictive control method for multi-energy flow of smart community combined with stochastic response surface method[J].Automation of Electric Power Systems,2018,42(4):121-127(in Chinese).
[4]彭寒梅,曹一家,黄小庆.对等控制孤岛微电网的静态安全风险评估[J].中国电机工程学报,2016,36(18):4837-4846,5107.Peng Hanmei,Cao Yijia,Huang Xiaoqing.Static security risk assessment of islanded microgrids under peer-peer control[J].Proceedings of the CSEE,2016,36(18):4837-4846,5107(in Chinese).
[5]Mitra P,Vittal V,Keel B,et al.A systematic approach to n-1-1 analysis for power system security assessment[J].IEEE Power and Energy Technology Systems Journal,2016,3(2):71-80.
[6]Geidl M,Koeppel G,Favre-Perrod P,et al.Energy hubs for the future[J].IEEE Power and Energy Magazine,2007,5(1):24-30.
[7]王继业,李洋,路兆铭,等.基于能源交换机和路由器的局域能源互联网研究[J].中国电机工程学报,2016,36(13):3433-3439.Wang Jiye,Li Yang,Lu Zhaoming,et al.Research on local-area energy internet control technology based on energy switches and energy routers[J].Proceedings of the CSEE,2016,36(13):3433-3439(in Chinese).
[8]Zeng Qing,Fang Jiakun,Li Jinghua,et al.Steady-state analysis of the integrated natural gas and electric power system with bi-directional energy conversion[J].Applied Energy,2016,184:1483-1492.
[9]Beigvand S D,Abdi H,Scala M L,et al.A general model for energy hub economic dispatch[J].Applied Energy,2017,190:1090-1111.
[10]Ayele G T,Haurant P,Laumert B,et al.An extended energy hub approach for load flow analysis of highly coupled district energy networks:Illustration with electricity and heating[J].Applied Energy,2018,212:850-867.
[11]Dey P,Mehra R,Kazi F,et al.Impact of topology on the propagation of cascading failure in power grid[J].IEEETransactions on Smart Grid,2016,7(4):1970-1978.
[12]Athari M H,Wang Zhifang.Impacts of wind power uncertainty on grid vulnerability to cascading overload failures[J].IEEE Transactions on Sustainable Energy,2018,9(1):128-137.
[13]Zhang Xi,Liu Dong,Zhan Choujun,et al.Effects of cyber coupling on cascading failures in power systems[J].IEEEJournal on Emerging and Selected Topics in Circuits and Systems,2017,7(2):228-238.
[14]Wang Yi,Zhang Ning,Kang Chongqing,et al.Standardized matrix modeling of multiple energy systems[J].IEEE Transactions on Smart Grid,2019,10(1):257-270.
[15]Fu Xueqian,Zhang Xiurong.Failure probability estimation of gas supply using the central moment method in an integrated energy system[J].Applied Energy,2018,219:1-10.
[16]Correa-Posada C M,Sánchez P.Integrated power and natural gas model for energy adequacy in short-term operation[J].IEEE Transactions on Power Systems,2015,30(6):3347-3355.
[17]孙国强,陈胜,郑玉平,等.计及电-气互联能源系统安全约束的可用输电能力计算[J].电力系统自动化,2015,39(23):26-32,42.Sun Guoqiang,Chen Sheng,Zheng Yuping,et al.Available transfer capability calculation considering electricity and natural gas coupled energy system security constrains[J].Automation of Electric Power Systems,2015,39(23):26-32,42(in Chinese).
[18]余娟,马梦楠,郭林,等.含电转气的电-气互联系统可靠性评估[J].中国电机工程学报,2018,38(3):708-715.Yu Juan,Ma Mengnan,Guo Lin,et al.Reliability evaluation of integrated electrical and natural-gas system with power-to-gas[J].Proceedings of the CSEE,2018,38(3):708-715(in Chinese).
[19]骆柏锋,穆云飞,赵波,等.基于统一潮流模型的电-气耦合综合能源系统静态灵敏度分析[J].电力系统自动化,2018,42(13):29-35.Luo Bofeng,Mu Yunfei,Zhao Bo,et al.Static sensitivity analysis of integrated electricity and gas system based on unified power flow model[J].Automation of Electric Power Systems,2018,42(13):29-35(in Chinese).
[20]潘昭光,孙宏斌,郭庆来.面向能源互联网的多能流静态安全分析方法[J].电网技术,2016,40(6):1627-1634.Pan Zhaoguang,Sun Hongbin,Guo Qinglai.Energy internet oriented static security analysis method for multi-energy flow[J].Power System Technology,2016,40(6):1627-1634(in Chinese).
[21]Vahid-Pakdel M J,Seyedi H,Mohammadi-Ivatloo B.Enhancement of power system voltage stability in multi-carrier energy systems[J].International Journal of Electrical Power&Energy Systems,2018,99:344-354.
[22]艾小猛,方家琨,徐沈智,等.一种考虑天然气系统动态过程的气电联合系统优化运行模型[J].电网技术,2018,42(2):409-416.Ai Xiaomeng,Fang Jiakun,Xu Shenzhi,et al.An optimal energy flow model in integrated gas-electric systems considering dynamics of natural gas system[J].Power System Technology,2018,42(2):409-416(in Chinese).
[23]张义斌.天然气-电力混合系统分析方法研究[D].北京:中国电力科学研究院,2005.Zhang Yibin.Study on the methods for analyzing combined gas and electricity networks[D].Beijing:China Electric Power Research Institute,2005(in Chinese).
[24]Moeini-Aghtaie M,Abbaspour A,Fotuhi-Firuzabad M,et al.A decomposed solution to multiple-energy carriers optimal power flow[J].IEEE Transactions on Power Systems,2014,29(2):707-716.
[25]王英瑞,曾博,郭经,等.电-热-气综合能源系统多能流计算方法[J].电网技术,2016,40(10):2942-2950.Wang Yingrui,Zeng Bo,Guo Jing,et al.Multi-energy flow calculation method for integrated energy system containing electricity,heat and gas[J].Power System Technology,2016,40(10):2942-2950(in Chinese).