Transmission Line Backup Protection Based on Negative Sequence Current Differential Algorithm Using IEC-61850 Asynchronous Data from an Adjacent Substation

2020 ◽  
Vol 69 (3) ◽  
pp. 409-413
Author(s):  
Sun-Woo Lee ◽  
Nam-Ho Lee ◽  
Soon-Ryul Nam
Keyword(s):  
Transmission Line ◽  
Iec 61850 ◽  
Negative Sequence ◽  
Backup Protection ◽  
Differential Algorithm ◽  
Negative Sequence Current

scholarly journals Turn-to-Turn Fault Diagnosis on Three-Phase Power Transformer Using Hybrid Detection Algorithm

2021 ◽  
Vol 11 (6) ◽  
pp. 2608
Author(s):  
Chien-Hsun Liu ◽  
Willybrordus H. P. Muda ◽  
Cheng-Chien Kuo
Keyword(s):  
Fuzzy System ◽  
Power Transformer ◽  
Detection Algorithm ◽  
Current Response ◽  
Negative Sequence ◽  
Three Phase ◽  
Hybrid Detection ◽  
Incipient Faults ◽  
Increase In Accuracy ◽  
Negative Sequence Current

A power transformer (PT) in power generation or transmission is critical to maintaining electrical continuity. Fault detection on a PT is needed, especially of incipient faults, which are often caused by a turn-to-turn fault (TTF) before it develops into a more severe fault. We use a hybrid algorithm between conventional and modern techniques to detect a developing fault in a PT. The current response signals from a negative sequence current directional algorithm, extended park vector algorithm (EPVA), differential negative sequence current, and EPVA-fuzzy system are combined to distinguish the possibility of a TTF. The subalgorithms are combined using a hybrid detection algorithm to distinguish the faults. The model is a 10 MVA, three-phase PT with Δ-Y configuration 150/300 kV, simulated using MATLAB Simulink software. The results show that by combining the subalgorithms, several limitations are distinguished within the TTF with a slight increase in accuracy.

scholarly journals A New Protection Strategy Based on Negative Sequence Current Coordinated Control on the Generator Extremity

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 135329-135338
Author(s):  
Zhenxing Li ◽  
Zhihao Xie ◽  
Zhenyu Wang ◽  
Hanli Weng ◽  
Lu Wang
Keyword(s):  
Coordinated Control ◽  
Negative Sequence ◽  
Protection Strategy ◽  
Negative Sequence Current
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