CRITIC-Based Node Importance Evaluation in Skeleton-Network Reconfiguration of Power Grids

Lin, Zhenzhi; Wen, Fushuan; Wang, Huifang; Lin, Guosong; Mo, Tianwen; Yao, Xiaojun

doi:10.1109/tcsii.2017.2703989

Cited by 66 publications

(49 citation statements)

References 14 publications

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“…The calculated subjective weight mainly reflects the importance of evaluation indexes and is not influenced by index values. The main objective weighting methods include entropy weight [20], data envelopment analysis [21], and criteria importance through intercriteria correlation [22]. The objective weight is calculated by the actual values of evaluation indexes and is influenced by the numerical values of the indexes.…”

Section: Determining the Weights Of Evaluation Indexesmentioning

confidence: 99%

Safety Assessment Model of Earth-Rock Dam Based on Ideal Point-Cloud Theory

Liwei¹,

Mingkai²,

Zhang³

et al. 2019

JESTR

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Uncertainty is inevitable in the safety monitoring and evaluation process of earth-rock dam. Such uncertainty makes the accurate reflection of the running status of earth-rock dams of traditional safety assessment results impossible. Thus, this study proposed a safety assessment model of earth-rock dams based on the combination weighting method of ideal point and the cloud theory model. The proposed model was used to scientifically solve the uncertainty during the safety assessment of earth-rock dams. Real and reliable weights of indexes were determined using the combination weighting method based on the ideal point. Then, the safety evaluation grade ranges of each evaluation index were divided on the basis of the measured data. These grade ranges were "softened" by combining cloud theory. The proposed safety assessment model was applied to an earth-rock dam in the reservoir of a pumped storage station in Tai'an City, Shandong Province, China. Results demonstrate that: (1) the proposed model can effectively solve fuzzy and random problems during the safety assessment of earth-rock dams, and (2) the results show that the safety of the investigated earth-rock dam is in a normal running state. This outcome reflects the actual conditions of the earth-rock dam. The proposed model provides references in the diagnosis and decision making in the earth-rock dam management department.

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Section: Determining the Weights Of Evaluation Indexesmentioning

confidence: 99%

Safety Assessment Model of Earth-Rock Dam Based on Ideal Point-Cloud Theory

Liwei¹,

Mingkai²,

Zhang³

et al. 2019

JESTR

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“…Network efficiency is defined as the mean of the reciprocal of the shortest path length between all node pairs and is utilized to identify the core components of the network topology [20]. Considering the operation state of power systems, the shortest electrical path length d X L min,ij is adopted [21].…”

Section: Rate Of Change Of Network Efficiencymentioning

confidence: 99%

“…Generally, analytic hierarchy process (AHP) [25] and G1 method [26] are adopted for determining the subjective weighting method; criteria importance through interference correlation (CRITIC) [20] and entropy weighting method [27] are adopted for determining the objective weighting. For different evaluation indexes, the importance of subjective and objective weights is different.…”

Section: Critical Lines Identification Based On the Modified Vikor Mementioning

confidence: 99%

Critical Lines Identification for Skeleton-Network of Power Systems under Extreme Weather Conditions Based on the Modified VIKOR Method

et al. 2018

Self Cite

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Identifying and preferentially reinforcing critical lines for skeleton-network of power systems is significant in improving the secure and stable operation of power systems under extreme weather conditions. Under this background, in this paper, six indexes are first presented for identifying critical lines for skeleton-network with the power elements' parameters and the impact of extreme weather conditions, the network topology and the operation state of power systems considered. Then, the modified Vise Kriterijumska Optimizacija I Kompromisno Resenje in Serbian (VIKOR) method, in which the synthetic weights of indexes determined by the combination weighting method are adopted, is utilized to identify the importance degrees of lines in a given power system. Both the overall performance and the outstanding individual performance of lines are considered, which is beneficial for the critical lines identification for skeleton-network. Finally, the proposed multi-indexes and methods are applied to part of the actual Guangdong power system in China. The numerical results are compared with those obtained by single-attribute and multi-attribute evaluation methods and other evaluation methods.

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“…An imbalance between generation and loads [5,6] causes the system to enter a fast cascading period, when electrical instabilities such as transient instability and voltage instability are involved [7]. If corrective control actions are not taken or there is a failure to isolate the affected region to tackle these issues, an additional line trip may trigger oscillation in the system before its complete collapse [8]. Under such circumstances, and as a last resort, controlled islanding has been recommended to save the power system from a big blackout [2,9].…”

Section: Introductionmentioning

confidence: 99%

A Three-Stage Procedure for Controlled Islanding to Prevent Wide-Area Blackouts

Shao¹,

Mao²,

Liu³

et al. 2018

Energies

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Controlled islanding has been proposed as a last resort action to stop blackouts from happening when all standard methods have failed. Successful controlled islanding has to deal with three important issues: when, and where to island, and the evaluation of the dynamic stability in each island after islanding. This paper provides a framework for preventing wide-area blackouts using wide area measurement systems (WAMS), which consists of three stages to execute a successful islanding strategy. Normally, power system collapses and blackouts occur shortly after a cascading outage stage. Using such circumstances, an adapted single machine equivalent (SIME) method was used online to determine transient stability before blackout was imminent, and was then employed to determine when to island based on transient instability. In addition, SIME was adopted to assess the dynamic stability in each island after islanding, and to confirm that the chosen candidate island cutsets were stable before controlled islanding was undertaken. To decide where to island, all possible islanding cutsets were provided using the power flow (PF) tracing method. SIME helped to find the best candidate islanding cutset with the minimal PF imbalance, which is also a transiently stable islanding strategy. In case no possible island cutset existed, corresponding corrective actions such as load shedding and critical generator tripping, were performed in each formed island. Finally, an IEEE 39-bus power system with 10 units was employed to test this framework for a three-stage controlled islanding strategy to prevent imminent blackouts.

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CRITIC-Based Node Importance Evaluation in Skeleton-Network Reconfiguration of Power Grids

Cited by 66 publications

References 14 publications

Safety Assessment Model of Earth-Rock Dam Based on Ideal Point-Cloud Theory

Safety Assessment Model of Earth-Rock Dam Based on Ideal Point-Cloud Theory

Critical Lines Identification for Skeleton-Network of Power Systems under Extreme Weather Conditions Based on the Modified VIKOR Method

A Three-Stage Procedure for Controlled Islanding to Prevent Wide-Area Blackouts

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