Open AccessResearch on the Measurement of Zero Sequential Equivalence Impedance of Double-circuit Transmission Lines
Author(s) -
Shuai Guan,
Zhirui Liang
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/740/1/012078
Subject(s) - transmission line , inductance , electrical impedance , electric power transmission , characteristic impedance , interference (communication) , quarter wave impedance transformer , signal (programming language) , line (geometry) , transmission (telecommunications) , equivalent circuit , impedance matching , electronic engineering , physics , telecommunications , computer science , electrical engineering , engineering , mathematics , damping factor , voltage , geometry , channel (broadcasting) , programming language
The measurement of transmission line parameters is often affected by adjacent lines, especially the measurement of zero-sequence impedance parameters is affected by mutual inductance between lines, thus affecting the measurement results. This paper establishes the double-circuit transmission line model to verify the change of zero-sequence impedance parameters of transmission lines when the spatial layout of double-circuit transmission line in different interference signal carriers and the size of interference signal are different. The variation law of zero-sequence impedance parameters of transmission line affected by interference lines is summarized. It provides a reference for the subsequent setting of relay protection devices for transmission lines.