Six-sequence Component Based Single Ended Fault Location Method of Transmission Line

Six-sequence component based single ended fault location method of transmission line went forward on the basis of line distributed parameter model. The same and reverse direction component can be obtained through the decoupling of the same tower, Based on the reverse current and voltage boundary conditions of different faults, the fault location algorithm of double circuit lines can be obtained. (Single line three phase fault and the cross line fault with the same name are excluded) The principle of the algorithm is not affected by transition resistance, system impedance and distributed capacitance. Besides, the algorithm only uses the current, hence it won't be affected by the transmission characteristics of the voltage transformer. The precision of ranging is not affected by the characteristics of the current transformer is also theoretically proved. There is no pseudo root for the ranging equation and it has unique solution. The simulation results show that the proposed algorithm has high accuracy and can meet the ranging requirements of high voltage and ultrahigh voltage transmission lines.