Comprehensive reliability assessment of smart distribution networks considering centralized distribution protection system

Abstract

The protection system has important influences on the reliability of smart distribution networks. Therefore, the comprehensive reliability assessment of smart distribution networks includes primary distribution networks and a protection system. Because the traditional reliability evaluation of a distribution network does not consider the influence of relay protection and the complex configuration mode of the area-centralized distribution protection system (ACDPS) in the smart distribution network, a comprehensive reliability analysis method was proposed in this article. First, the whole reliability model of the area-centralized protection system, including two major failure modes, is proposed based on the fault tree method. Then, an equivalent model of the area-centralized protection system in circuit breakers or switches for the undesired-tripping mode and the fail-to-operate mode is also established. Based on this, an improved failure mode and effect analysis (IFMEA) method is presented to assess the comprehensive reliability of smart distribution networks considering the influence of fault location and protection system. The proposed method can correctly evaluate the comprehensive reliability of the smart distribution networks. The research results are also helpful to the construction of a protection system in the smart distribution networks.

A Review on Active Customers Participation in Smart Grids

“…By removing these elements from the operation, the protection schemes aim to maintain the remaining system in service. The protection is used to respond to more significant changes in supply that may limit the levels of transgress elements' power, frequency, or voltage [37], [38].…”

Research on Distribution Network Reliability Investment Estimation Method Based on Sequence Linearization Correlation Analysis

“…Scenario 4: Adding a section switch to the existing overhead line Adding a section switch to existing overhead lines can increase the average number of line sections, and the cost is related to the construction of section switches. The calculation formula is (14) where 5o C is the overhead line feeder automation transformation cost in scenario 5;…”

“…Reference [13] presents the method to assess the reliability and risk implications of post-fault demand response. Reference [14] takes the influence of fault location and delay protection system into consideration. Reference [15] analyses urban distribution network through the application of a timesequential Monte Carlo simulation.…”

A Reliability Evaluation Method for Independent Small Offshore Electric Systems

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