Performance testing low-voltage ground-fault protection

Coyle, T.

doi:10.1109/tia.2002.800593

Cited by 2 publications

(1 citation statement)

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“…However, single phase-earth fault is frequently occurred in distribution system. Because ground fault capacitive current is too small to be detected in non-solid earthing systems, protection schemes for non-solid earthing systems have low sensitivity and poor accuracy [4] [5].…”

Section: Introductionmentioning

confidence: 99%

Discriminant-Analysis-Based Single-Phase Earth Fault Protection Using Improved PCA in Distribution Systems

Wang

Zhou

et al. 2015

IEEE Trans. Power Delivery

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This paper presents a new approach for single phase-earth fault protection in distribution systems. Traditional protection schemes are analyzed and compared with one another for effective fault feature extraction. Maximum likelihood method is also carried out on several copula functions to find the optimal copula to fit the fault feature data. Then, copula rank correlation is calculated by the optimal copula, and the principal component analysis technique is improved to preprocess and reduce the dimension of the fault data by decomposing the copula rank correlation matrix instead of computing the eigenvalues and their eigenvectors of the covariance matrix. Finally, distance discriminant function is defined and operation criterion is proposed, and distance discriminant analysis is used to discriminate the faulty feeder. Simulation results of a practical 10kV distribution system show that the proposed approach of fault protection is able to achieve better identification accuracy than hierarchical clustering algorithm and FCM algorithms based approaches. Index Terms-protection; distribution systems; single phase-earth fault; principal component analysis; discriminant analysis 0885-8977 (c)

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Section: Introductionmentioning

confidence: 99%