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This paper presents the measured impedance at the relaying point in the presence of Static Var Compensator (SVC), one of the shunt connected Flexible Alternating Current Transmission System (FACTS) devices; in the case of inter phase, phase to phase and three phase, faults. The presence of SVC on a transmission line has a great influence on the measured impedance at the relaying point. In the presence...
At present, gas protection and current differential protection are generally used as the main protection for traction transformer in China high-speed railway. Overcurrent protection with busbar low-voltage start-up is used as the backup protection installed at HV side and LV side of transformer. This paper introduces the principle of overcurrent protection with busbar low-voltage start-up, and then...
In this paper, a novel distance protection algorithm in frequency domain is introduced. Based on the R-L model of transmission lines, this algorithm is derived from the linear equations which are obtained in fault condition network and O-module network for single-phase-to-earth fault. Considering that transformers usually ground directly in high voltage power systems, a linear equation with three...
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