Detecion of two – phase shortage fault event on transmission line by using daubechies wavelets
Tác giả: Tran Hoai Linh, Truong Tuan Anh, David Cartes,
Nhà xuất bản: November 21-24, Swissotel Le Concorde, Bangkok, Thailand
Shortage is one of the most popular defects on the power transmission lines. In this paper, we’ll concentrate on the detection and estimation of the time moment of shortage. In this paper we’ll consider only the two- phase shortage type on a three-phase transmission line. The model will use a transmission line at 220kV, 200 km long, and signal frequency at 50Hz with different positions of failure and the failure shorting resistances to test the proposed solutions. The input signals are only the voltages and currents at the beginning of the line. The math tool selected for this task is the decomposition algorithms by using Daubechies wavelets. The numerical results will show the effectiveness of the proposed method, where the average error is less than 1.5ms while the maximum error is 4ms.