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Pilot protection method of half-wavelength AC transmission lines based on random matrix theory by Yutao TANG; Hongchun SHU; Kai HE; Guanxue WANG; Litao LIU; Yiming HAN; Yue DAI is a Engineering article available to read on EtoBox.

What is Pilot protection method of half-wavelength AC transmission lines based on random matrix theory about?

The fault characteristics of ultra-high voltage (UHV) half-wavelength (HWL) transmission lines exhibit significant differences from those of conventional transmission lines, which renders the conventional relay protection method unsuitable for ensuring the protection of HWL. To solve this problem, a pilot protection method of HWTL based on random matrix theory was proposed. Voltage and current fault components obtained at the protection installation on both sides of the line were used as the input of the random matrix to form the singular value equivalent matrix, and the eigenvalues of the random matrix at both ends were calculated. The faults inside and outside the area were determined according to the distribution of the eigenvalues in the circular plane area. The protection scheme avoids the data synchronization problem at both ends of the line. Real time digital simulation system (RTDS) simulation revealed that the proposed protection method can protect the full length of the line, is suitable for various fault types and fault conditions, and exhibits excellent resistance to transition resistance.

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Author

Yutao TANG; Hongchun SHU; Kai HE; Guanxue WANG; Litao LIU; Yiming HAN; Yue DAI

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)