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Algorithm comparison for high impedance fault detection based on staged fault test

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3 Author(s)
Ching-Lien Huang ; Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan ; Hui-Yung Chu ; Ming-Tong Chen

Four high-impedance fault-detection algorithms-proportional relaying, ratio ground relaying, second-order harmonic current relaying, and third-order harmonic current relaying-were simulated by mathematical models. Relaying performances using staged fault data were then compared. Results of the fault data processing were used to distinguish the detection characteristics: fault identification, stability, threshold setting adaptability, transient recovery characteristic, and availability. The operations of a ground overcurrent relay and a ratio ground relay were also checked in the test. The results can be used as a reference for the development of a reliable high-impedance fault detector

Published in:

IEEE Transactions on Power Delivery  (Volume:3 ,  Issue: 4 )