TITLE:
Transmission Lines Distance Protection Using Differential Equation Algorithm and Hilbert-Huang Transform
AUTHORS:
Xingmao Liu, Zhengyou He
KEYWORDS:
Hilbert-Huang Transform; Differential Equation Algorithm; Distance Protection; Transmission Lines
JOURNAL NAME:
Journal of Power and Energy Engineering,
Vol.2 No.4,
April
23,
2014
ABSTRACT: This paper proposed the scheme of transmission lines distance protection based on differential equation algorithms (DEA) and Hilbert-Huang transform (HHT). The measured impedance based on EDA is affected by various factors, such as the distributed capacitance, the transient response characteristics of current transformer and voltage transformer, etc. In order to overcome this problem, the proposed scheme applies HHT to improve the apparent impedance estimated by DEA. Empirical mode decomposition (EMD) is used to decompose the data set from DEA into the intrinsic mode functions (IMF) and the residue. This residue has monotonic trend and is used to evaluate the impedance of faulty line. Simulation results show that the proposed scheme improves significantly the accuracy of the estimated impedance.