Analysis of High Harmonic Amplification in Transmission Lines
With the rapid development of the scale of the power grid and the increasing demand for electricity,people have put forward higher requirements for power quality.However,with the use of modern equipment such as semiconductor switchgear and ferromagnetic saturation equipment,harmonic problems are widespread.Harmonics will cause serious harm to the power grid,it will not only cause additional losses,but also have a certain adverse impact on the safety and stable operation of the power grid.Whether the harmonic transmission of the transmission line is amplified mainly depends on the line parameters and the connected load,and the capacitive and inductive parameters of the components in the sys-tem will cause resonance,and when the harmonic number and resonance points injected into the system are the same,har-monic amplification will occur.Based on the actual case of harmonic amplification of transmission lines,this paper builds the equivalent impedance model of the system,combines the field test parameters,and uses ETAP software simulation to analyze the reasons for harmonic amplification,and proposes an effective harmonic suppression scheme.
power qualityharmonic amplificationharmonic suppressionETAP