Multi-field coupling simulation calculation method and device for high-speed mechanical switch

Abstract

The invention provides a multi-field coupling simulation calculation method and device for a high-speed mechanical switch, wherein the method comprises the steps of subjecting the high-speed mechanical switch to electromagnetic field simulation analysis to determine transient coil current of the high-speed mechanical switch and electromagnetic repulsive force of a repulsive metal disc; subjectingthe high-speed mechanical switch to thermal-electric coupled field simulation analysis according to the transient coil current so as to obtain a temperature rise curve of a coil; subjecting the high-speed mechanical switch to opening rebound movement field coupled simulation analysis according to the electromagnetic repulsive force so as to obtain a displacement curve of the high-speed mechanicalswitch. By subjecting the high-speed mechanical switch to electromagnetic field simulation analysis, thermal-electric coupled field simulation analysis and opening rebound movement field coupled simulation analysis, movement, contact collision and coil temperature rise of the high-speed mechanical switch can be comprehensively reflected; therefore, mechanical properties of the high-speed mechanical switch can be comprehensively and accurately reflected, thereby providing theoretical guidance on the optimal design of hybrid direct-current breaker quick mechanical switches.

Description

technical field [0001] The invention relates to the technical field of circuit breaker simulation calculation, in particular to a high-speed mechanical switch multi-field coupling simulation calculation method and a calculation device thereof. Background technique [0002] High-speed mechanical switches are key components of hybrid DC circuit breakers, and their performance is mainly determined by their operating mechanisms. At present, electromagnetic repulsion mechanisms are mainly used, which generally have the disadvantages of short output time and small operating distance, so they are mostly used in medium and low voltage voltages. grade. For high-voltage high-speed mechanical switches, multiple high-speed mechanical switch units of medium and low voltage levels are generally used in series and synchronously operated structures at home and abroad. Therefore, the mechanical characteristics and stability of high-speed mechanical switches are particularly important. [0...

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Problems solved by technology

[0004] In view of this, the present invention proposes a high-speed mechanical switch multi-field coupling simulation calculation method and its calculation device, aiming to solve the problem that the current research on high-speed mechanical switches is mostly based on electromagnetic field single-field simulation design, which cannot fully and accurately reflect the mechanical performance The problem

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