﻿ 基于数学形态学的直流接地极引线C型行波故障测距

# 基于数学形态学的直流接地极引线C型行波故障测距C Type Traveling Wave Fault Location for HVDC Grounding Lines Based on Mathematical Morphology

Abstract: On the basis of introducing the principle of C type traveling wave fault location and mathematical morphology theory, this paper proposes a C type traveling wave fault location method based on mathematical morphology according to the propagation characteristics of the pulse signal in the grounding line. Firstly, this method carries on modulus separation of propagation process of the pulse signal on line, then, it uses the morphological algorithm for wave filtering, and the forward and backward waves are separated by the gradient transform. This method not only has certain anti-interference ability, but also can accurately distinguish the moment of the first reflection pulse reaching to the measuring point. Results show that the method is not only feasible but also helpful to improve the reliability and accuracy of the fault location for high voltage DC grounding wire through simulation of PSCAD and graphics processing of MATLAB.

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