Motivated by the small world network research of Watts ＆ Strogatz, this paper studies relationships between topology and cascading line outages in electric power grids. Cascading line outages are a type of cascading ...Motivated by the small world network research of Watts ＆ Strogatz, this paper studies relationships between topology and cascading line outages in electric power grids. Cascading line outages are a type of cascading collapse that can occur in power grids when the transmission network is congested. It is characterized by a self-sustaining sequence of line outages followed by grid breakup, which generally leads to widespread blackout. The main findings of this work are twofold： On one hand, the work suggests that topologies with more disorder in their interconnection topology tend to be robust with respect to cascading line outages in the sense of being able to support greater generation and demand levels than more regularly interconnected topologies. On the other hand, the work suggests that topologies with more disorder tend to be more fragile in that should a cascade get started, they tend to break apart after fewer outages than more regularly interconnected topologies. Thus, as has been observed in other complex networks, there appears to be a tradeoff between robustness and fragility. These results were established using synthetically generated power grid topologies and verified using the IEEE 57 bus and 188 bus power grid test cases.展开更多
2006年,欧洲发生了"11.4"大停电事故,引起了电力行业的广泛关注。根据欧洲输电联盟(Union for the Coordination of Transmission of Electricity,简称UCTE)公布的最终事故调查和分析报告,主要介绍归纳了2006年西欧"11.4...2006年,欧洲发生了"11.4"大停电事故,引起了电力行业的广泛关注。根据欧洲输电联盟(Union for the Coordination of Transmission of Electricity,简称UCTE)公布的最终事故调查和分析报告,主要介绍归纳了2006年西欧"11.4"停电事故发生的主要原因和各方面因素,结合湖南电网的实际情况,探讨了应对措施。展开更多
基金Funding for this work was provided by National Science Foundation grant ECS-0323685, ＂Robustness, Efficiency, and Security of Electric Power Grids in a Market Environment.＂ Any opinions expressed are those of the author and do not necessarily reflect the views of the National Science Foundation.Acknowledgment This work was performed while the author was working with Prof. Yu-Chi Ho in the Division of Engineering and Applied Science at Harvard University, Cambridge MA. The author wishes to thank Prof. Ho for his guidance and support during that period. The author would like to thank the referees for their valuable comments to improve the paper.
文摘Motivated by the small world network research of Watts ＆ Strogatz, this paper studies relationships between topology and cascading line outages in electric power grids. Cascading line outages are a type of cascading collapse that can occur in power grids when the transmission network is congested. It is characterized by a self-sustaining sequence of line outages followed by grid breakup, which generally leads to widespread blackout. The main findings of this work are twofold： On one hand, the work suggests that topologies with more disorder in their interconnection topology tend to be robust with respect to cascading line outages in the sense of being able to support greater generation and demand levels than more regularly interconnected topologies. On the other hand, the work suggests that topologies with more disorder tend to be more fragile in that should a cascade get started, they tend to break apart after fewer outages than more regularly interconnected topologies. Thus, as has been observed in other complex networks, there appears to be a tradeoff between robustness and fragility. These results were established using synthetically generated power grid topologies and verified using the IEEE 57 bus and 188 bus power grid test cases.
文摘2006年,欧洲发生了"11.4"大停电事故,引起了电力行业的广泛关注。根据欧洲输电联盟(Union for the Coordination of Transmission of Electricity,简称UCTE)公布的最终事故调查和分析报告,主要介绍归纳了2006年西欧"11.4"停电事故发生的主要原因和各方面因素,结合湖南电网的实际情况,探讨了应对措施。
