有载分接开关快速机构动力学特性及对电气时序影响分析

A quick mechanism is an energy supply center of a switching core for an on-load tap-changer. This paper takes a spring type quick mechanism of the on-load tap-changer as a research object, and establishes a dynamic simulation model of the quick mechanism by studying switching processes of the quick mechanism. Effects on release time and residual energy of the quick mechanism are studied for spring pre-stored energy and flywheel moment of inertia. A mathematical prediction model of energy release time and residual energy is established for the quick mechanism under constant resistance torque condition. An accurate prediction method on pre-stored energy of spring is presented for quick mechanism with different switching time under load conditions. Electrical characteristics of the quick mechanism under different switching sequences are studied, which provides a reference for determining the optimal electrical switching sequence and the corresponding relationship between the ideal switching sequence of the quick mechanism under the determined load and the mechanical driving angle. Influences of the damping coefficient for the vibration-absorbing block on the impact force of trigger and the maximum rotation angle of the flywheel are explored, which provides a theoretical basis for optimization on the vibration absorbing block for the quick mechanism of the on-load tap-changer.