Study On The Anti-galloping Of Active Anti-galloping Device

It is quite common for the actual transmission lines to encounter harsh environment suchas freezing rain, snow and windy inevitably, which causes the low-frequency, large amplitudeconductor galloping, and the damage is difficult to estimate for the power system andpeople’s life. So researchers all over the world have never stopped to study the anti-gallopingdevices. However, the existing anti-galloping devices can’t be controlled after installation,which belong to "passive" anti-galloping devices, have limited working conditions and poorapplicability. The design of active anti-galloping device provides a new idea for thedevelopment of anti-galloping devices. But its other aspects have not been studied yet exceptits structure and anti-galloping theory. Therefore, further research of the active anti-gallopingdevice was carried out in this paper, Main research contents are as follows:Firstly, the combined model of wire and active anti-galloping device was established byADAMS. The phase differences between pendulum swinging function of active anti-galloping device and displacement function of conductor galloping were set as0°（synchronousswing）、45°、90°、135°、180°（backswing）、-135°、-90°、-45°tosimulatetheir galloping effects. The simulation results show that the active anti-galloping device hasthe best galloping effect when the phase difference is0°, and consistent with the theoreticalanalysis, and was verified from the displacement comparison curve.Secondly, flexible body model of40m,70m, and100m three spans transmission lineswere established in ADAMS, and finite element model of Self-supporting-JG tension towerwas established in HYPERMESH. Considering the safety of the conductor as well as thetower.6was taken as the safety coefficient of the conductor and its maximum working stress47.2MPa as its security boundary. Strength analysis of the tower was performed accordingto the strength theory and1.5was taken as its safety coefficient, then the allowable stress was230MPa as its security boundary. On these basis, galloping simulation of three spansconductors was carried out to obtain the galloping amplitudes of the conductors needed totake anti-galloping measures, meanwhile the safety of the conductors and tower in thegalloping process was checked.Finally, weight and active anti-galloping simulation of40m、70m、100m wires weredone, and their galloping amplitudes were compared with their stable galloping amplitudes,different effects of restraining galloping amplitudes for weight and active anti-galloping was analyzed. The results show that active anti-galloping device has obvious advantages thanweight anti-galloping device, it not only makes the galloping amplitudes be decreasedobviously but also reduced gradually with time，and it can eliminate the hazard of galloping.The best anti-galloping phase difference of the active anti-galloping device was figuredout in this paper. The combined model of conductor and active anti-galloping device wasestablished by ADAMS, and anti-galloping simulation was done considering the safety ofconductors and tower to provide a theoretical basis for the control design of active anti-galloping device, and provide a new idea for numerical simulation study of anti-galloping.