Synthetic Risk Assessment of Catastrophic Failures in Power System Based on Entropy Weight Method

2012 ◽  
Vol 446-449 ◽  
pp. 3015-3018 ◽  
Author(s):  
Jing Feng ◽  
Ying Wang ◽  
Xian Yong Xiao
Keyword(s):  
Risk Assessment ◽  
Power System ◽  
Severity Index ◽  
Assessment Method ◽  
Entropy Weight ◽  
Event Sequences ◽  
Risk Assessment Method ◽  
Catastrophic Failures ◽  
Entropy Weight Method ◽  
Weight Method

The synthetic risk assessment method incorporating the severity and the possibility is used to identify the catastrophic event sequences in power system. The weight setting of each severity index is determined by the proposed entropy weight method. Comparing with traditional methods, the entropy weight method can determine the weight coefficients objectively. The simulation results for the WSCC-9 buses system have proved the validity of the proposed method. This method can be used in the practice power system.

scholarly journals The Risk Assessment of Debris Flow Hazards in Banshanmen Gully Based on the Entropy Weight-Normal Cloud Method

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
X. B. Gu ◽  
S. T. Wu ◽  
X. J. Ji ◽  
Y. H. Zhu
Keyword(s):  
Risk Assessment ◽  
Debris Flow ◽  
Cloud Model ◽  
Risk Estimation ◽  
Assessment Method ◽  
Risk Level ◽  
Entropy Weight ◽  
Entropy Weight Method ◽  
Weight Method ◽  
Index Weight

The debris flow is one of the geological hazards; its occurrence is complex, fuzzy, and random. And it is affected by many indices; a new multi-index assessment method is proposed to analyze the risk level of debris flow based on the entropy weight-normal cloud model in Banshanmen gully. The index weight is calculated by using the entropy weight method. Then, the certainty degree of each index belonging to the corresponding cloud is obtained by using the cloud model. The final risk level of debris flow is determined according to the synthetic certainty degree. The conclusions are drawn that the method is feasible and accurate rate of risk estimation for debris flow is very high, so a new method and thoughts for the risk assessment of debris flow can be provided in the future.

scholarly journals Risk Assessment Method for Integrated Transmission–Distribution System Considering the Reactive Power Regulation Capability of DGs

Energies ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 3040
Author(s):  
Qi Wang ◽  
Dasong Sun ◽  
Jianxiong Hu ◽  
Yi Wu ◽  
Ji Zhou ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Power System ◽  
Distribution System ◽  
Reactive Power ◽  
Distribution Networks ◽  
Assessment Method ◽  
Fault Analysis ◽  
Power Sources ◽  
Risk Assessment Method ◽  
Power Regulation

High distributed generation (DG) penetration makes the traditional method of equalizing the distribution power system (DPS) to the PQ load bus in the risk assessment of the transmission power system (TPS) no longer applicable. This paper proposes a risk assessment method for an integrated transmission–distribution system that considers the reactive power regulation capability of the DGs. Based on the DG’s characteristics and network constraints, the regulation capacity is mapped to the boundary buses of the distribution networks. Coordinating the relationship between reactive power and active power, the utilization of the regulation capacity is maximized to reduce the load shedding in the fault analysis of the TPS. Simulation results in the integrated transmission–distribution system illustrate that the effective use of the regulation capacity of the DPS can reduce the risk of the TPS. The method can be applied to the reactive power sources planning and dispatching of power system.

The Risk Assessment of Tunnels Based on Grey Correlation and Entropy Weight Method

2017 ◽  
Vol 36 (3) ◽  
pp. 1621-1631 ◽  
Author(s):  
Cheng-lu Gao ◽  
Shu-cai Li ◽  
Jing Wang ◽  
Li-ping Li ◽  
Peng Lin
Keyword(s):  
Risk Assessment ◽  
Entropy Weight ◽  
Grey Correlation ◽  
Entropy Weight Method ◽  
Weight Method
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