New Accurate Fault Location Algorithm for
Faults Between Two Lines of
Double-Circuit Transmission Line Based on Differential Network
Suonan Jiale,Wang Shugang,Wu Yaping,Song Guobing
(School of Electrical Engineering,Xi'an Jiaotong University,Xi'an 710049,China)
Abstract:The remarkable mutual inductance between two lines of the parallel lines in
extra high voltagle power system and the shunt capacitance are necessary to be taken into
account in fault location.Based on differential network,an accurate fault location
algorithm for the situation between two lines of double-circuit transmission lines on the
same tower is described,where post-fault voltages and currents derived from one terminal
are employed in the location and the shunt capacitance is considered.The algorithm is,but
independent of source impedance and fault resistance. The presented algorithm maintains
high accuracy for double-circuit transmission lines and the locating equation leads to the
unique solution.The simulation results indicate that the maximal error is less than 0.05%
theoretically.
Keywords:double-circuit transmission lines;differential network;distributed
parameter;fault location