| 引用本文: | 苏洁莹,邓丰强,张勇军.考虑相依特性的电-气互联网络故障评估方法[J].电力自动化设备,2021,41(11): |
| SU Jieying,DENG Fengqiang,ZHANG Yongjun.Failure assessment method of integrated electricity and natural gas network considering interdependent characteristics[J].Electric Power Automation Equipment,2021,41(11): |
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| 摘要: |
| 随着电网和天然气网的耦合程度不断加深，电网与天然气网间的相依特性引发了新的系统安全运行问题，增加了电-气互联网络发生连锁故障的风险。为此，提出了一种考虑电网与天然气网间相依特性的电-气互联网络故障传播的影响分析方法。分析电-气互联网络的相依特性以及故障在两网间的传播机理；基于此分析电网与天然气网不同耦合程度下故障在两网间的传播特性；进而建立计及天然气网慢动态特性的电-气互联网络准稳态潮流模型，从系统供能效率与供能可靠性角度，采用负荷损失率和全局网络效能损失率指标评估分析电-气互联网络的故障传播及其对系统运行的影响，以此构建电-气互联网络连锁故障评估模型。 |
| 关键词: 电-气互联网络 相依特性 连锁故障 故障评估 电网 天然气网 |
| DOI：10.16081/j.epae.202108007 |
| 分类号:TK01;TM73 |
| 基金项目:国家自然科学基金资助项目(51777077) |
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| Failure assessment method of integrated electricity and natural gas network considering interdependent characteristics |
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SU Jieying, DENG Fengqiang, ZHANG Yongjun
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Research Center of Smart Energy Technology, School of Electric Power, South China University of Technology, Guangzhou 510640, China
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| Abstract: |
| With the deepening of coupling degree between power grid and natural gas network, the interdependent characteristics between the two systems lead new problems about safe operation of system, which increases the risk of cascading failures in integrated electricity and natural gas system. Therefore, an analysis method of the impact of failure propagation for integrated electricity and natural gas system considering the interdependent characteristics between power grid and natural gas network is proposed. The interdependent characteristics of integrated electricity and natural gas network and the propagation mechanism of failures between the two networks are analyzed, based on this, the characteristics of failure propagation between the two networks under different coupling degrees of power grid and natural gas network are analyzed. Furthermore, the quasi-steady-state power flow equations of integrated electricity and natural gas system considering the slow time-scale dynamic characteristics of natural gas network are constructed. And then, from the perspective of energy supply efficiency and reliability of system, the impact of failure propagation on operation of integrated electricity and natural gas system is evaluated and analyzed by using the indicators of loss rate of load and loss rate of global network effectiveness, so that the assessment model of cascading failures of integrated electricity and natural gas system is constructed. |
| Key words: integrated electricity and natural gas network interdependent characteristics cascading failure failure assessment power grid natural gas network |
