Responsiveness of Multi-Channel IEC-61850 Substation Communication Network Reliability Performance to Changes in Repair Factors

Mathebula, Vonani Clive; Saha, Akshay Kumar

doi:10.1109/access.2020.3046950

Cited by 6 publications

(2 citation statements)

References 40 publications

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“…The impact of the quality of repairs on the reliability performance of SCN architecture based on IEC 61850 is discussed in [37], [38]. Other studies are presented in [39], [40] focusing on the SCN architecture's responsiveness to incremental changes in the quality of repairs. Nevertheless, the authors in [37]- [40] do not address the impact of CCF coupled with the quality of repairs on the SCN architecture.…”

Section: A Critical Review Of Iec 61850 Scn Architecture Reliability Studiesmentioning

confidence: 99%

Impact of Quality of Repairs and Common Cause Failures on the Reliability Performance of Intra-Bay IEC 61850 Substation Communication Network Architecture Based on Markov and Linear Dynamical Systems

Mathebula

Saha

2021

IEEE Access

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Modernisation of substations using digital-based Substation Communication Networks (SCN) enables the automation of substations, allowing effective and efficient monitoring of substation equipment and implementing complex control and protection schemes. The IEC 61850 standard for SCN's objective is to integrate substation devices from different vendors, enabling peer-to-peer communication between the devices. The reliability investigation of the IEC 61850 based SCN architecture continues since it is left to the system designer to determine based on the network's applications and functions. In all endeavours to designing highly available SCN architectures, redundant systems are employed in mission-critical applications. In this paper, the impact of Common Cause Failures (CCF) and the quality of repairs on the reliability performance of IEC 61850 based architecture are investigated using the Markov process and Linear Dynamical Systems, where the diagnostic coverage level of the system is based on the ISO 13849-1. The results of the case studies indicate that common engineering design and coupling factors have a negative impact on the system reliability performance, notably for systems with high diagnostic coverage. The results also indicate that the factors have less impact when the system diagnostic coverage is low, specifically at low repair efficiency levels. However, the impact becomes more pronounced as the repair efficiency increases, as observed from the responses of the transition probability matrix's eigenvalue magnitudes. Thus, it is critical to ensure the minimum impact of common engineering design and coupling factors by diversifying the system's subsystems to ensure a high independence level.

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Section: A Critical Review Of Iec 61850 Scn Architecture Reliability Studiesmentioning

confidence: 99%

Impact of Quality of Repairs and Common Cause Failures on the Reliability Performance of Intra-Bay IEC 61850 Substation Communication Network Architecture Based on Markov and Linear Dynamical Systems

Mathebula

Saha

2021

IEEE Access

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“…Due to rising emphasis on substation automation, SCADA, and monitoring control [1], operational speed and protection coordination form the most important aspect and are prime factors in any protection system [2], [3]. As the demand for electricity continues to rise, distribution systems are taking a strain and becoming more complex with increasing loads, voltages, and currents [4]. As a result, protection miscoordination may occur due to poor overcurrent relay settings [5], [6].…”

Section: Introductionmentioning

confidence: 99%

Effects of Particle Swarm Optimization and Genetic Algorithm Control Parameters on Overcurrent Relay Selectivity and Speed

Langazane

Saha

2022

IEEE Access

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Distribution systems continue to grow and becoming more complex with increasing operational challenges such as protection miscoordination. Initially, conventional methods were favoured to solve overcurrent relay coordination problems; however, the implementation of these methods is time-consuming. Therefore, recent studies have adopted the utilisation of particle swarm optimization and genetic algorithms to solve overcurrent relay coordination problems and maximise system selectivity and operational speed. Particle swarm optimization and genetic algorithms are evolutionary algorithms that at times suffer from premature convergence due to poor selection of control parameters. Consequently, this paper presents a comprehensive sensitivity analysis to evaluate the effect of the discrete control parameters on particle swarm optimizer and genetic algorithms performance, alternatively on the behaviour of overcurrent relays. Optimization algorithms aim to minimise overcurrent relay time multiplier settings and accomplish optimal protection coordination. The findings indicate that particle swarm optimization is more sensitive to inertia weight and swarm size while the number of iterations has minimal effect. The results also depict that 30% crossover, 2% mutation, and smaller population size yield faster convergence rate and optimise fitness function, which improves genetic algorithms performance. Sensitivity analysis results are verified by comparing the performance of particle swarm optimization with the genetic algorithms which show the former parameter setting outperforms the latter. The relay operational speed is reduced by 15% for particle swarm optimization and system selectivity is maximised. The optimal protection coordination achieved using particle swarm optimization showed superiority of the algorithm, its ability to circumvent premature convergence, consistency, and efficiency.

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Reliability assessment applied in the design of an industrial substation in the context of Industry 4.0

Cabral,

Tofoli,

Sampaio

et al. 2024

Electric Power Systems Research

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Responsiveness of Multi-Channel IEC-61850 Substation Communication Network Reliability Performance to Changes in Repair Factors

Cited by 6 publications

References 40 publications

Impact of Quality of Repairs and Common Cause Failures on the Reliability Performance of Intra-Bay IEC 61850 Substation Communication Network Architecture Based on Markov and Linear Dynamical Systems

Impact of Quality of Repairs and Common Cause Failures on the Reliability Performance of Intra-Bay IEC 61850 Substation Communication Network Architecture Based on Markov and Linear Dynamical Systems

Effects of Particle Swarm Optimization and Genetic Algorithm Control Parameters on Overcurrent Relay Selectivity and Speed

Reliability assessment applied in the design of an industrial substation in the context of Industry 4.0

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