NDLI: Mathematical modelling of the voltage transfer functions of an unloaded overhead line during its energisation under faulty conditions

Content Provider	IET Digital Library
Author	Mujović, Saša Vujošević, Snežana Vujošević, Luka
Abstract	Transient overvoltage represents a high magnitude voltage surge of a short duration which has to be considered when performing proper insulation coordination. Overhead line energisation is found to be a fundamental cause of transients. Both normal and faulty conditions are possible during line energisation. The latter implies the existence of an asymmetrical phase-to-ground fault and facing with two asymmetrical processes which take place concurrently. This type of energisation results in severe overvoltage, as well as in a voltage rise at the line receiving end. However, in practice, measuring devices are usually placed at the line sending end, which points to difficulties in determination of phase-voltages at the opposite end of the line. This study offers a solution for the aforementioned issue by proposing the frequency-dependent voltage transfer functions (TFs). By using the functions any voltage value at the sending line end will obtain the corresponding value at the receiving end. The functions are derived through complex mathematical modelling and by signal processing based on the empirical mode decomposition method. The TFs validity is confirmed through performed simulation in MATLAB Simulink and real-site measurements.
Starting Page	287
Ending Page	295
Page Count	9
ISSN	17518822
Volume Number	13
e-ISSN	17518830
Issue Number	Issue 2, Mar (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-smt/13/2
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-smt.2018.5365
Journal	IET Science, Measurement & Technology
Publisher Date	2018-11-06
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Asymmetrical Phase-to-ground Fault Complex Mathematical Modelling Empirical Mode Decomposition Fault Diagnosis Frequency-dependent Voltage Transfer Function High Magnitude Voltage Surge Hilbert Transform Insulation Coordination Integral Transforms in Numerical Analysis Line Receiving End Line Sending End MATLAB Simulink Overhead Line Energisation Overhead Power Line Overvoltage Protection Phase-voltages Determination Power Overhead Line Power System Protection Real-site Measurement Signal Processing Signal Processing And Conditioning Equipment And Technique Surge Protection Transfer Function Transient Overvoltage Unloaded Overhead Line Voltage Rise
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering

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