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Fault Detection and Locating Using Electromagnetic Time Reversal (EMTR) Technique for HVDC Transmission Network

Fault detection in HVDC system is of great importance for reliable operation. In this paper, Electromagnetic Time Reversal (EMTR) technique-based fault detection and localization are proposed. As fault generated transient signal travels along the transmission line, EMTR can help to detect the fault. A HVDC system is simulated in the PSCAD software. EMTR algorithm is developed in the MATLAB environment. This method is able to detect the fault and differentiate DC fault from external fault. To provide more credibility to the results, different fault cases are simulated namely, pole-to-pole, pole-to-ground and load variation. Analyzing the effect of the protection and control system, the proposed EMTR-based fault detection is very effective for robust fault detection and location identification.