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Interpreting the vulnerability of power systems in cascading failures using multi-graph convolutional Research Article

Supaporn LONAPALAWONG, Changsheng CHEN, Can WANG, Wei CHEN

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 12,   Pages 1848-1861 doi: 10.1631/FITEE.2200035

Abstract: Analyzing the of in is generally regarded as a challenging problem. Although existing studies can extract some critical rules, they fail to capture the complex subtleties under different operational conditions. In recent years, several deep learning methods have been applied to address this issue. However, most of the existing deep learning methods consider only the grid topology of a power system in terms of topological connections, but do not encompass a power system's spatial information such as the electrical distance to increase the accuracy in the process of graph convolution. In this paper, we construct a novel power- that uses power system topology and spatial information to optimize the edge weight assignment of the line graph. Then we propose a multi-graph convolutional network (MGCN) based on a graph classification task, which preserves a power system's spatial correlations and captures the relationships among physical components. Our model can better handle the problem with that have parallel lines, where our method can maintain desirable accuracy in modeling systems with these extra topology features. To increase the interpretability of the model, we present the MGCN using layer-wise relevance propagation and quantify the contributing factors of model classification.

Keywords： Power systems     Vulnerability     Cascading failures     Multi-graph convolutional networks     Weighted line graph    

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Improvement of the cascading closed loop cycle system

ZHANG Guoqiang, CAI Ruixian

Frontiers in Energy 2007, Volume 1, Issue 3,   Pages 341-346 doi: 10.1007/s11708-007-0051-5

Abstract: Aspen Plus was used to simulate and get more information about the cascading closed loop cycle (CCLC)
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Lightweight design of an electric bus body structure with analytical target cascading

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11465-022-0718-y

Abstract: developed multi-material electric bus body structure is examined in combination with analytical target cascading

Keywords： electric vehicle     body in white (BIW)     lightweight     analytical target cascading (ATC)    

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Cascading decomposition of Boolean control networks: a graph-theoreticalmethod Research Articles

Yi-feng LI, Jian-dong ZHU

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 2,   Pages 304-315 doi: 10.1631/FITEE.1900422

Abstract: Two types of cascading decomposition problems of Boolean control networks are investigated using a raph-theoreticalBased on NPEVP, the necessary and sufficient graphic conditions for solvability of the cascading decompositionconditions, the logical coordinate transformations are constructively obtained to realize the corresponding cascading

Keywords： Boolean control networks     Semi-tensor product     Cascading decomposition     Graphic condition    

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Optimal one-bit perturbation in Boolean networks based on cascading aggregation Research Articles

Jin-feng PAN, Min MENG

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 2,   Pages 294-303 doi: 10.1631/FITEE.1900411

Abstract: attractors and minimizes the size of the BOAs of undesired attractors for large-scale Boolean networks by cascading

Keywords： Large-scale Boolean network     Attractor     Cascading aggregation     One-bit perturbation    

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Dams and Floods

F. Lempérière

Engineering 2017, Volume 3, Issue 1,   Pages 144-149 doi: 10.1016/J.ENG.2017.01.018

Abstract:

The possible mitigation of floods by dams and the risk to dams from floods are key problems. The People’s Republic of China is now leading world dam construction with great success and efficiency. This paper is devoted to relevant experiences from other countries, with a particular focus on lessons from accidents over the past two centuries and on new solutions. Accidents from floods are analyzed according to the dam’s height, storage, dam material, and spillway data. Most of the huge accidents that have been reported occurred for embankments storing over 10 hm3. New solutions appear promising for both dam safety and flood mitigation.

Keywords： Floods     Flood mitigation     Spillways     Labyrinth spillways     Dam failures    

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Fragility assessment of wood sheathing panels and roof-to-wall connections subjected to wind loading

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4,   Pages 867-876 doi: 10.1007/s11709-021-0745-5

Abstract: The performance of the wood-frame buildings after tornadoes has shown that the majority of the wind damage resulted from building envelope failure most typically due to the loss of the roof. To assess the performance and the reliability of low-rise wood-frame residential buildings with a focus on the roofs, fragility analysis can be used to estimate the probability of failure of a roof when constructed with specified nails and sheathing sizes. Thus, this paper examines the fragility of specific types of nails, roof-to-wall (RW) connection details, and sheathing sizes based on the damaged roofs that were previously assessed in the Dunrobin area in Ottawa (Ontario) that was hit with an Enhanced Fujita (EF3) tornado on September 21, 2018. The presented fragility analysis considers four scenarios, including different sheathing and nail sizes. Dead loads, wind loads, and resistance on the sheathing panels were compiled and analyzed to determine the failure of the examined roofs. The eight fragility models suggest that the safest roof sheathing (RS) is the 1.22 m × 1.22 m sheathing panel with 8 d nails, and the safest RW connections is achieved by using H2.5 hurricane clips.

Keywords： tornadoes     wind loads     low-rise buildings     fragility analysis     risk assessment     structural failures    

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Assessment of fatigue life of remanufactured impeller based on FEA

Lei XU,Huajun CAO,Hailong LIU,Yubo ZHANG

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 3,   Pages 219-226 doi: 10.1007/s11465-016-0394-x

Abstract:

Predicting the fatigue life of remanufactured centrifugal compressor impellers is a critical problem. In this paper, the S-N curve data were obtained by combining experimentation and theory deduction. The load spectrum was compiled by the rain-flow counting method based on the comprehensive consideration of the centrifugal force, residual stress, and aerodynamic loads in the repair region. A fatigue life simulation model was built, and fatigue life was analyzed based on the fatigue cumulative damage rule. Although incapable of providing a high-precision prediction, the simulation results were useful for the analysis of fatigue life impact factors and fatigue fracture areas. Results showed that the load amplitude greatly affected fatigue life, the impeller was protected from running at over-speed, and the predicted fatigue life was satisfied within the next service cycle safely at the rated speed.

Keywords： remanufactured impeller     fatigue life     impeller failures     finite element analysis (FEA)    

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Reducing power grid cascading failure propagation by minimizing algebraic connectivity in edge addition Research Articles

Supaporn LONAPALAWONG, Jiangzhe YAN, Jiayu LI, Deshi YE, Wei CHEN, Yong TANG, Yanhao HUANG, Can WANG,11821132@zju.edu.cn,wcan@zju.edu.cn

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 3,   Pages 382-397 doi: 10.1631/FITEE.2000596

Abstract: metrics, such as node connectivity and edge connectivity, which do not encompass a global perspective of cascadingTo evaluate the , we calculate the using MATCASC to simulate cascading line outages in s.

Keywords： Network robustness     Cascading failure     Average propagation     Algebraic connectivity     Power grid    

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Cyber–Physical Power System (CPPS): A review on measures and optimization methods of system resilience

Frontiers of Engineering Management 2021, Volume 8, Issue 4,   Pages 503-518 doi: 10.1007/s42524-021-0163-3

Abstract: The recent advances in modeling methods for cascading failures within the CPPS, which is the theoretical

Keywords： Cyber–Physical Power System     resilience assessment     resilience optimization     cascading failure modeling    

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Exploring self-organization and self-adaption for smart manufacturing complex networks

Frontiers of Engineering Management 2023, Volume 10, Issue 2,   Pages 206-222 doi: 10.1007/s42524-022-0225-1

Abstract: Subsequently, analytical target cascading is used to formulate the processes of self-organizing optimal

Keywords： Things     smart manufacturing complex networks     self-organization and self-adaption     analytical target cascading    

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A Multi-Layer Collaboration Framework for Industrial Parks with 5G Vehicle-to-Everything Networks Article

Yanjun Shi, Qiaomei Han, Weiming Shen , Xianbin Wang

Engineering 2021, Volume 7, Issue 6,   Pages 818-831 doi: 10.1016/j.eng.2020.12.021

Abstract: Then, the analytical target cascading method is adopted to configure and evaluate the collaboration schemes

Keywords： Vehicle-to-everything     Industrial park     Logistics     Device–edge–cloud collaboration     Analytical target cascading    

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Onmodeling of electrical cyber-physical systems considering cyber security Project supported by the National Basic Research Program (863) of China (No. 2015AA05002), the National Natural Science Foundation of China (No. 61471328), and the Science and Technology Project of State Grid, China (No. XXB17201400056)

Yi-nan WANG,Zhi-yun LIN,Xiao LIANG,Wen-yuan XU,Qiang YANG,Gang-feng YAN

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 5,   Pages 465-478 doi: 10.1631/FITEE.1500446

Abstract: This paper establishes a new framework for modeling electrical cyber-physical systems (ECPSs), integrating both power grids and communication networks. To model the communication network associated with a power transmission grid, we use a mesh network that considers the features of power transmission grids such as high-voltage levels, long-transmission distances, and equal importance of each node. Moreover, bidirectional links including data uploading channels and command downloading channels are assumed to connect every node in the communication network and a corresponding physical node in the transmission grid. Based on this model, the fragility of an ECPS is analyzed under various cyber attacks including denial-of-service (DoS) attacks, replay attacks, and false data injection attacks. Control strategies such as load shedding and relay protection are also verified using this model against these attacks.

Keywords： Cyber-physical systems     Cyber attacks     Cascading failure analysis     Smart grid    

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Title Author Date Type Operation

Interpreting the vulnerability of power systems in cascading failures using multi-graph convolutional

Supaporn LONAPALAWONG, Changsheng CHEN, Can WANG, Wei CHEN

Journal Article

Improvement of the cascading closed loop cycle system

ZHANG Guoqiang, CAI Ruixian

Journal Article

Lightweight design of an electric bus body structure with analytical target cascading

Journal Article

Cascading decomposition of Boolean control networks: a graph-theoreticalmethod

Yi-feng LI, Jian-dong ZHU

Journal Article

Optimal one-bit perturbation in Boolean networks based on cascading aggregation

Jin-feng PAN, Min MENG

Journal Article

Dams and Floods

F. Lempérière

Journal Article

Fragility assessment of wood sheathing panels and roof-to-wall connections subjected to wind loading

Journal Article

Assessment of fatigue life of remanufactured impeller based on FEA

Lei XU,Huajun CAO,Hailong LIU,Yubo ZHANG

Journal Article

Reducing power grid cascading failure propagation by minimizing algebraic connectivity in edge addition

Supaporn LONAPALAWONG, Jiangzhe YAN, Jiayu LI, Deshi YE, Wei CHEN, Yong TANG, Yanhao HUANG, Can WANG,11821132@zju.edu.cn,wcan@zju.edu.cn

Journal Article

Cyber–Physical Power System (CPPS): A review on measures and optimization methods of system resilience

Journal Article

Exploring self-organization and self-adaption for smart manufacturing complex networks

Journal Article

A Multi-Layer Collaboration Framework for Industrial Parks with 5G Vehicle-to-Everything Networks

Yanjun Shi, Qiaomei Han, Weiming Shen , Xianbin Wang

Journal Article

Onmodeling of electrical cyber-physical systems considering cyber security Project supported by the National Basic Research Program (863) of China (No. 2015AA05002), the National Natural Science Foundation of China (No. 61471328), and the Science and Technology Project of State Grid, China (No. XXB17201400056)

Yi-nan WANG,Zhi-yun LIN,Xiao LIANG,Wen-yuan XU,Qiang YANG,Gang-feng YAN

Journal Article