REVIEW ON MODELS OF CASCADING FAILURE IN COMPLEX POWER GRID
26
Citation
0
Reference
20
Related Paper
Citation Trend
Abstract:
In complex power grid, cascading failure that is triggered by some small disturbances can have global catastrophic effects over the entire networks, the theoretical modeling is the basic and key problem for the research on cascasding failures in complex power grid. On the basis of researching the mechanism of cascading failures occurred in power grids, the existing models for cascading failures in power gird are respectively presented and reviewed with the viewpoints of power system and complex network theory, and some feasible methods to prevent and control cascasding failures are analyzed. It is pointed out that the analysis and evaluation on network vulnerability will be the crux of the matter while the preclusive analysis of cascading failures is conducted. To control the failure spread the multi agent system (MAS) may be an effective approach. Finally, several research directions which are worth the whistle are proposed.Keywords:
Cascading failure
Viewpoints
Power grid
Vulnerability
Power-system protection
Complex system
Power network
Cite
On complex networks,large-scale cascading failures that are triggered by some small disturbances can lead to disastrous consequences.In order to satisfy demand of the people on the security and reliability of complex networks related to the national economy and people's livelihood,the study on cascading failures on complex networks becomes a hot branch of complex networks research in recent years.The theoretical modeling is the basic and key problem for analysis,prevention and control of cascading failures.Main developments of cascading failures on complex networks were surveyed,mainly including several types of cascading failures models and the relevant research results.Both the existing problems at present and the development trend were pointed out.
Cascading failure
Interdependent networks
Complex system
Cite
Citations (2)
Cascading failure
Power-system protection
Cite
Citations (17)
Power grid cascading failures may cause large scale blackout and lead to serious consequences. The forecasting of the follow-up failures in the initial stage of the failure is very helpful. On the basis of analyzing developing process of the typical cascading failures, branch static energy function model is constructed comprehensively, and an energy index is built to map the change of flow. Meanwhile, combining with the electric betweenness that reflects the network structure vulnerability, considering the cumulative influence of previous failure on the following-up failure, a comprehensive margin index reflecting the change of state and structure after the grid failure is proposed to forecast the following-up cascading failures. The simulation results can search out a set of serious cascading failures, which shows the feasibility and validity of the method.
Cascading failure
Blackout
Margin (machine learning)
Vulnerability
Cite
Citations (1)
Cascading failure
Blackout
Robustness
Power-system protection
Cite
Citations (118)
Real-world network systems, for example, power grids, are critical to modern economies. Due to the increasing system scale and complex dependencies inside of these networks, system failures can widely spread and cause severe damage. We have experienced massive cascading failures in power grids, such as major U.S. western grid failures in 1996 and the great Northeast blackout of 2003. Therefore, analyzing cascading failures and defense strategies, in response to system catastrophic breakdown, is crucial. Although many efforts have been performed to prevent failure propagation throughout systems, optimal system restoration considering system dependency against cascading failures is rarely studied. In this paper, we present a framework to optimize restoration strategies to improve system resiliency regarding cascading failures. The effects of restoration strategies are evaluated by system resilience loss during the cascading process. Furthermore, how system dependency influences the effects of the system restoration actions against cascading failures are investigated. By performing a case study on the western U.S. transmission grid, we demonstrate that our framework of system restoration optimization can enhance system resiliency by reducing the intensity and extent of cascading failures. Our proposed framework provides insights regarding optimal system restoration from cascading failures to enhance the resiliency of real-life network systems.
Cascading failure
Blackout
Resilience
Cite
Citations (4)
This paper centers on the comparison of three different models that describe cascading failures of power systems. Specifically, these models are different in characterizing the physical properties of power networks and computing the branch power flow. Optimal control approach is applied on these models to identify the critical disturbances that result in the worst-case cascading failures of power networks. Then we compare these models by analyzing the critical disturbances and cascading processes. Significantly, comparison results on IEEE 9 bus system demonstrate that physical and electrical properties of power networks play a crucial role in the evolution of cascading failures, and it is necessary to take into account these properties appropriately while applying the model in the analysis of cascading blackout.
Cascading failure
Blackout
Power-system protection
Power network
Cite
Citations (9)
With the development of complex network theory,especially the discovery of small-world characteristics in the power grid,increasingly great concern is shown about the relationship between the complex structural characteristic and the cascading failures of power grid.On the basis of the complex network theory,the heterogeneity of the small-world power grid is studied and several failure modes and indices are presented in this paper.The inherent mechanism of cascading failures in the small-world power grid are analyzed and effective measures to improve the capability of the power grid to endure large-scale blackouts are put forward.Investigations on grid topological characteristics and failure simulations show that the structural vulnerability of the small-world power grid is the root cause of failures to cascade in the grid,while the external factor can hardly fundamentally remedy such a situation.More rational resource configuration and load distribution will be of greater significance to the prevention of large-scale cascading failures and an increase in the reliability of electricity transmission.
Cascading failure
Vulnerability
Microgrid
Power grid
Cite
Citations (13)
Highly interconnected power grid is developing more and more complex. Cascading failure in such complex power grid, which can be triggered by some disturbances, will have global catastrophic effects over the entire networks. So the research on cascading failure of complex power grid is of significant concern. The foundation of such research is the modeling. In this paper, the mechanism of cascading failure in power grid is firstly explained. Then respectively from the point of view in artificial power system and complex network, several existing models are introduced and commented. And some feasible methods, which should be paid more attention to in the future, in order to prevent and control cascading failure are also analyzed and discussed.
Cascading failure
Power grid
Power-system protection
Complex system
Cite
Citations (36)
This paper focuses on cascading line failures in the transmission system of the power grid. Such a cascade may have a devastating effect not only on the power grid but also on the interconnected communication networks. Recent large-scale power outages demonstrated the limitations of epidemic- and percolation-based tools in modeling the cascade evolution. Hence, based on a linearized power flow model (that substantially differs from the classical packet flow models), we obtain results regarding the various properties of a cascade. Specifically, we consider performance metrics such as the the distance between failures, the length of the cascade, and the fraction of demand (load) satisfied after the cascade. We show, for example, that due to the unique properties of the model: (i) the distance between subsequent failures can be arbitrarily large and the cascade may be arbitrarily long, (ii) a large set of initial line failures may have a smaller effect than a failure of one of the lines in the set, and (iii) minor changes to the network parameters may have a significant impact. Moreover, we show that finding the set of lines whose removal has the most significant impact (under various metrics) is NP-Hard. Moreover, we develop a fast algorithm to recompute the flows at each step of the cascade. The results can provide insight into the design of smart grid measurement and control algorithms that can mitigate a cascade.
Cascading failure
Cite
Citations (4)
Cascading failure plays an important role in blackouts. Complex network theory, with the disadvantage of ignoring some of physical features of the power systems, is often utilized to model the cascading failure evolution processes. In this paper, a new risk assessment method based on evolution procedure and dynamic fault trees (DFTs), is proposed to model cascading failures in power systems. DFTs, which extend standard fault tree by allowing the modeling of complex system components’ behaviors and interactions, are introduced to describe the cascading failure mathematical model. The power grid topologies affected by protective relays, circuit breakers and transmission lines are taken into consideration to overcome the disadvantages of complex network theory. The evolution of cascading failures of power system, which is modeled based on the DFT, is significantly closer to the actual physical system behavior. The effectiveness of the proposed risk assessment method is discussed using two test cases.
Cascading failure
Power-system protection
Power grid
Cite
Citations (3)