Intelligent controller for split phase type quick permanent magnet vacuum circuit breaker

Abstract

The invention discloses an intelligent controller for a split phase type quick permanent magnet vacuum circuit breaker and belongs to the technical field of intelligent low-voltage apparatus. The intelligent controller comprises a micro processor unit, a power supply unit, a coil control and drive unit, and a detection and display unit. The coil control and drive unit comprises a permanent magnetic mechanism brake closing and separating capacitor charging circuit, an electromagnetic repulsive force mechanism brake closing and separating capacitor charging circuit, a permanent magnetic mechanism brake closing and separating coil control circuit, an electromagnetic repulsive force mechanism brake opening and closing coil control circuit and a switching tube drive and protection circuit. Due to the introduction of the intelligent controller, the coordination and control of coil current of an electromagnetic repulsive force mechanism and a permanent magnetic mechanism can be realized, the permanent magnet vacuum circuit breaker can be accurately and intelligently regulated and controlled, and the phase selection operation of the permanent magnet vacuum circuit breaker can be realized.

Description

technical field [0001] The invention discloses an intelligent controller of a phase-splitting type fast permanent magnet vacuum circuit breaker, which belongs to the technical field of intelligent low-voltage electrical appliances. Background technique [0002] As the most critical power equipment in the smart grid, the performance of the permanent magnet vacuum circuit breaker directly affects the safe and reliable operation of the smart grid. In recent years, the permanent magnet vacuum circuit breaker with vacuum as insulation and arc extinguishing medium has been widely valued and generally welcomed by steel, metallurgy, mining, oil field and other industries. It has the advantages of small contact arc erosion rate and no exposure, strong breaking capacity, With the advantages of long working life, it can be used in harsh environments with high gas concentration and dust. The permanent magnet vacuum circuit breakers currently researched are all operated by a permanent m...

AI Technical Summary

Problems solved by technology

The split-phase fast permanent magnet vacuum circuit breaker can realize intelligent phase splitting operation and intelligent phase selection operation under the split-phase intelligent control unit. On the other hand, it can reduce or even eliminate the operating overvoltage and closing inrush current generated by capacitor bank and transformer switching, which is beneficial to improve the stability of the power system and the service life of the circuit breaker. However, the split-phase fast permanent magnet vacuum circuit breaker The control mechanism of the device is complicated, the operation is insensitive, and the insensitivity of opening and closing will cause problems such as poor controllability and many safety hazards to the normal operation of the equipment itself. Therefore, the performance of the split-phase intelligent control unit is the limit. An important reason for the widespread production and application of phase fast vacuum circuit breakers

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