Numerical Simulation Study On Anti-galloping Of Double Bundle Conductor Lines With Interphase Spacers

Electricity is one of the most important energy in our country, the safe operation oftransmission lines related to the normal development of economy and life in our country.Iced transmission line will vibration low-frequency and substantially in specificconditions which we call it “galloping”. It result in the electrical insulation gap toosmall between each phase conductor and ground wire which causing the trip. Inserious, transmission line will break and tower will collapse because of dramatic changein tension which can seriously affect the safe operation of the transmission lines.Therefore, the study of the dynamic response of the transmission line during gallopinghave important practical value. Now, a large number of scholars have launched a lot ofresearch on the galloping of transmission line and prevention. One of the most wildlyused is interphase spacer. So, study its anti-galloping performance and optimizationprogram have a high practical significance.First, the method of interphase spacer anti-galloping numerical simulation havebeen studied in this thesis. Finite element models of iced transmission lines withinterphase spacer are set up by ABAQUS. The amplitude of conductor during gallopinghave been reduced after installed interphase spacer. At the same time, the strength ofinterphase spacer, the tension of conductor and the wind speed of starting gallopingduring galloping have been studied.Then, finite element models of three-phase transmission lines with triangle andvertical conductor arrangements are set up, and the anti-galloping efficiency of theinterphase spacers mounted on the transmission lines is numerically investigated bymeans of the ABAQUS software. Galloping responses of the transmission lines insteady wind flow and stochastic wind field are simulated, and the necessity to take thestochastic wind field into account in these analyses is illustrated through the comparisonof the dynamic responses of the two transmission lines in the two kinds of wind fields.The anti-galloping efficiency of the interphase spacers in the transmission line withtriangle and vertical conductor arrangements are analyzed based on the numericalsimulation results.Finally, the effect of anti-galloping with spacers arranged under different programsis analyzed by setting up finite element models of iced transmission lines with differentinterphase spacer under different programs. At the same time, the security has been verified. The optimization program of interphase spacer has been proposed finally.Through the study in this thesis, the numerical simulation method of anti-gallopingby using interphase spacer has been founded. Meanwhile, the program of arranginginterphase spacer is proposed for reference. This thesis has some practical engineeringsignificance.