Negative Sequence Current Based Fault Detection in Shunt CompensatedLines
Negative sequence algorithm, shunt compensation, fault, noise, Matlab/Simulink.
In transmission lines during line-charging or when there is a very low load at the receiving end, only a small current flows through the lines.To increase the power transfer capability, shunt reactors are employed in lines.They compensate for the ferranti effect in the lines. A distance relaying scheme is at certain times influenced by signal-noises. A signal noise is misinterpreted as a fault and the relay may trip.To avoid such conditions a blocking function must be used with the distance relays. However, if a fault occurs during noise conditions,the relay must detect the fault and trip. A negative sequence current based technique is used in this paper to detect all types of faultsin shunt compensated lines during signal noise conditions. The technique is tested for faults occuring during no-noise and noise conditions in MATLAB/SIMULINK
Article Details
Unique Paper ID: 142607

Publication Volume & Issue: Volume 2, Issue 4

Page(s): 93 - 96
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