Analysis of protection failure effect and relay coordination on reliability index

Hernanda, I Gusti Ngurah Satriyadi; Kartinisari, Evril N.; Asfani, Dimas Anton; Fahmi, Daniar

doi:10.1109/icitacee.2014.7065773

Cited by 5 publications

(2 citation statements)

References 3 publications

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“…The performance of relays is crucial to the stable operation of power systems, which has led many scholars to conduct extensive research on relay performance evaluation and life prediction [7,8]. Reference [9] constructs a relay failure prediction model based on contact resistance as a key parameter, but the accuracy of models built on a single parameter is often unsatisfactory.…”

Section: Introductionmentioning

confidence: 99%

Research on the Reliability Test and Life Assessment Methods of Relays Used in Circuit Breaker Operating Mechanism

Zhou

Gao

et al. 2023

Energies

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As one of the key components of the circuit breaker operating mechanism, the relay can experience performance degradation due to harsh environmental factors, such as salt spray, during operation, which can ultimately affect the normal operation of the circuit breaker and threaten the safe and stable operation of the power system. To effectively evaluate the condition of the relay operating in salt spray environments over the long term, this study conducted accelerated aging experiments on a certain model of auxiliary switch under salt spray conditions using an existing test platform. The relay’s pull-in voltage, release voltage, pull-in time, and release time were analyzed as characteristic parameters affected by salt spray. The results showed that the intrusion of salt spray caused a decline in the coil performance of the relay, which required higher voltage to provide the electromagnetic force needed for operation, leading to an increase in operating voltage. On the other hand, coil degradation also caused a decrease in the electromagnetic force generated by the step voltage, resulting in a slower operating time. Subsequently, a Genetic Algorithm_Back Propagation Neural Network GA_BP) algorithm model suitable for identifying the relay status in this study was established. After optimization by a Genetic Algorithm Neural Network (GA), the recognition accuracy increased from 78.6% to 91.8%, which showed significant improvement. By clarifying the changes in the characteristic parameters of the relay in a salt spray environment and relying on experimental data, this study established a relevant state recognition model. The research results have important engineering application value for understanding the relay operating status of the circuit breaker operating mechanism in salt spray environments, conducting circuit breaker operating mechanism relay life prediction, and preventing circuit breaker operating mechanism failures.

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Section: Introductionmentioning

confidence: 99%

Research on the Reliability Test and Life Assessment Methods of Relays Used in Circuit Breaker Operating Mechanism

Zhou

Gao

et al. 2023

Energies

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“…It also presents an algorithm to implement analysis of the short circuit, coordination, and calculate the reliability indices. In [19], an algorithm based on Monte Carlo has been proposed. Then the reliability indices have been obtained considering the coordination between overcurrent relays.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Power System Reliability Incorporating Protection System Miscoordination

Sabzebin

Noghabi

Mazlumi

2022

Preprint

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The operation of protection systems has a considerable impact on power system reliability. The main reason for cascading outages is protection system misoperation. Two leading causes of protection system misoperation are protection system failure and incorrect settings. The failure of any of its components of the protection system results in failure to operate or undesired tripping and incorrect settings of relays cause protection miscoordination. In this paper, an analysis of power system reliability regarding failure and incorrect settings of the protection system is paid. This paper proposes an eight-state Markov model for a transmission line and its protection system incorporating protection system miscoordination distingue from failure to operate and undesired trip. The situation of network lines in the period of simulation time has been determined by the sequential Monte Carlo method, and are calculated the reliability indices such as Loss of Load Probability (LOLP), Loss of Load Expectation (LOLE), Expected Energy Not Supplied (EENS), and Expected Frequency of Load Curtailment (EFLC). The proposed model is applied to a 6-bus IEEE RBTS network, and the reliability indices are calculated and compared from both perspectives to show the importance of the proposed model.

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Reliability assessment of PV location based on a new coordination and failure rates of protection relays to minimize indices energy

Jawad Abed,

A. Shalash,

Mhalla

2024

Cogent Engineering

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Analysis of protection failure effect and relay coordination on reliability index

Cited by 5 publications

References 3 publications

Research on the Reliability Test and Life Assessment Methods of Relays Used in Circuit Breaker Operating Mechanism

Research on the Reliability Test and Life Assessment Methods of Relays Used in Circuit Breaker Operating Mechanism

Evaluation of Power System Reliability Incorporating Protection System Miscoordination

Reliability assessment of PV location based on a new coordination and failure rates of protection relays to minimize indices energy

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