三相输电线动力系统耦合减振试验研究 postprint

Abstract: The vibration reduction of dynamic system of three-phase coupled overhead transmission linewas studied. With the 220 kV transmission line poject of Hunan Province as the engineering prototype ,atest model of two-span three-phase transmission line with adjustable stiffiness interphase spacers and timedelay excitation device was designed according to the principle of dynamic similarity. The three-phasetransmission lines are a nonlinear multi-vibrator coupled dynamic system , and the state of micro-amplitudevibration can be achieved by optimizing the structural parameters of coupling strength ,frequency mismatchand time delay. The test results show that the vibration of transmission line system has three stages i. e.amplitude declining , micro-amplitude vibration and amplitude rise with the increase of parameters of cou-pling strength and time delay. 'The stable parameter interval of micro-amplitude vibration is convenient for