A Practical Approach for Integrated Power System Vulnerability Analysis With Protection Failures

Yu, Xuan; Singh, Chanan

doi:10.1109/tpwrs.2004.835656

Cited by 165 publications

(72 citation statements)

References 10 publications

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“…Figure 8 shows the entropy changes caused by nodes and lines to help judge the importance of each unit of microgrid. In Figure 9, the 1 VI curve is changing gently. Once the entropy is close to zero, the 1 VI of nodes increases rapidly.…”

Section: Case Study and Resultsmentioning

confidence: 96%

“…The shortest path is defined as the minimum sum path between a generator and a node, which can be expressed as: (1) where is the resistance at line i, is the path set between two nodes.…”

Section: Structure Vulnerability Indexmentioning

confidence: 99%

“…The probability of incorrect operation may increase as a result of higher complexity when reinforcing the protection to guarantee dependability [1]. The vulnerability of the conventional power grid has been fully exposed by several outage accidents in recent years.…”

Section: Introductionmentioning

confidence: 99%

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The Application of Weighted Entropy Theory in Vulnerability Assessment and On-Line Reconfiguration Implementation of Microgrids

Xue

Xiang

Chen

2014

Entropy

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Abstract:With the consideration of randomness of distributed generations and loads, this paper has proposed a method for vulnerability assessment of microgrids based on complex network theory and entropy theory, which can explain the influence of the inherent structure characteristics and system internal energy distribution on the microgrid. The vulnerability assessment index is built, and the on-line reconfiguration model considering the vulnerability assessment of microgrid is also established. An improved cellular bat algorithm is tested on the CERTS system to implement the real time reconfiguration fast and accurately to provide the basis of theory and practice.

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Section: Case Study and Resultsmentioning

confidence: 96%

“…The shortest path is defined as the minimum sum path between a generator and a node, which can be expressed as: (1) where is the resistance at line i, is the path set between two nodes.…”

Section: Structure Vulnerability Indexmentioning

confidence: 99%

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The Application of Weighted Entropy Theory in Vulnerability Assessment and On-Line Reconfiguration Implementation of Microgrids

Xue

Xiang

Chen

2014

Entropy

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“…vulnerability of the transmission lines is evaluated using the probability of incorrect tripping caused by the current increment. The linear function of the probability can be obtained according to reference [43]. In this study, the probability of incorrect tripping is set to 0 when there is no current increment on the transmission line, and the probability is set to 1 when the current is greater than 1.4 times the rated value.…”

Section: Comparison Of Identification Resultsmentioning

confidence: 99%

Identification of Critical Transmission Lines in Complex Power Networks

Wang

Nechifor

et al. 2017

Energies

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Growing load demands, complex operating conditions, and the increased use of intermittent renewable energy pose great challenges to power systems. Serious consequences can occur when the system suffers various disturbances or attacks, especially those that might initiate cascading failures. Accurate and rapid identification of critical transmission lines is helpful in assessing the system vulnerability. This can realize rational planning and ensure reliable security pre-warning to avoid large-scale accidents. In this study, an integrated "betweenness" based identification method is introduced, considering the line's role in power transmission and the impact when it is removed from a power system. At the same time, the sensitive regions of each line are located by a cyclic addition algorithm (CAA), which can reduce the calculation time and improve the engineering value of the betweenness, especially in large-scale power systems. The simulation result verifies the effectiveness and the feasibility of the identification method.

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“…Weather conditions and vulnerability differ considerably between regions, but wind, lightning, and icing/snow are often identified as the most critical conditions [12]. Vulnerability analysis of power systems using reliability and risk-based methods have earlier been proposed, but these methods often focus on a higher system/voltage level [13]. The impact on distribution system reliability indices from single storms have earlier been analyzed in e.g., [14].…”

Section: Introductionmentioning

confidence: 99%

Vulnerability Analysis of Power Distribution Systems for Cost-Effective Resource Allocation

Wallnerström

Hilber

2012

IEEE Trans. Power Syst.

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Abstract-This paper proposes a method to allocate resources in power distribution planning and also introduces a new reliability index category, , flexibility to adjust to different laws or distribution system operator (DSO) policies of long outages. Possible legal consequences for distribution system operators are first identified and studied. A vulnerability-analysis method is introduced, including a statistical validation. The overall idea is to identify and evaluate possible states of power distribution systems using quantitative reliability analyses. Results should thus indicate how available resources (both human recourses and equipment) could be better utilized, e.g., in maintenance and holiday scheduling and in evaluating whether additional security should be deployed for certain forecasted weather conditions.To evaluate the method, an application study has been performed based on hourly weather measurements and about 65 000 detailed failure reports over eight years for two distribution systems in Sweden. Months, weekdays, and hours have been compared and the vulnerability of several weather phenomena in these areas has been evaluated. Of the weather phenomena studied, only heavy snowfall and strong winds, especially in combination, significantly affect the reliability. Temperature (frost), rain, and snow depth have a relatively low or no impact.

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A Practical Approach for Integrated Power System Vulnerability Analysis With Protection Failures

Cited by 165 publications

References 10 publications

The Application of Weighted Entropy Theory in Vulnerability Assessment and On-Line Reconfiguration Implementation of Microgrids

The Application of Weighted Entropy Theory in Vulnerability Assessment and On-Line Reconfiguration Implementation of Microgrids

Identification of Critical Transmission Lines in Complex Power Networks

Vulnerability Analysis of Power Distribution Systems for Cost-Effective Resource Allocation

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