Vacuum circuit breaker permanent magnet mechanism control device and method based on dual signal tracking

Abstract

The present invention is a vacuum circuit breaker permanent magnet mechanism control device and method based on dual-signal tracking, which belongs to the field of electrical automation control; the present invention uses a double-closed-loop PID control algorithm to make the motion characteristics of the contacts of the vacuum circuit breaker permanent magnet operating mechanism in a controlled state. control state, improve the robustness and control precision of the control system; by using the current sensor in the control device to measure the current of the excitation coil of the mechanism, the current of the excitation coil is controlled throughout the whole process, avoiding the possibility of coil burnout; curve, reduce the impact force of the moving contact when it reaches the limit position, improve the reliability of the mechanism action, and prolong the life; by increasing the opening and closing voltage and selecting the contact stroke curve, the energy loss caused by the contact is reduced to achieve the effect of energy saving , so that the circuit breaker can complete more reclosing operations under the same use conditions, effectively prolonging the service life of the circuit breaker and improving the stability of the power system at the same time.

Description

technical field [0001] The invention belongs to the field of electrical automation control, and in particular relates to a vacuum circuit breaker permanent magnet mechanism control device and method based on dual-signal tracking. Background technique [0002] The action phase of the traditional switch is random, and it is easy to generate a large surge current and a high induced overvoltage when the power system is connected and disconnected, resulting in a reduction in the service life of the switchgear and the power supply quality of the power system. Therefore, studying the intelligent control technology of circuit breakers can not only ensure the reliability and stability of power supply and improve the quality of power energy, but also has great significance for effectively improving the production efficiency of enterprises and the service life of equipment. [0003] Synchronous closing control technology can effectively weaken the inrush current and overvoltage generat...

AI Technical Summary

Problems solved by technology

The current traditional action time compensation method is that the control system detects various influencing factors online and calculates the value of the action time change caused by them to determine the moment when the action signal is issued. This method can only adjust the opening and closing time The error is controlled at ±2ms, and the opening and closing phase error reaches ±36°. However, the premise of the practical application of synchronous closing and closing control technology in the smart grid is that the closing time error must be within ±1ms, so that it is possible to accurately Control the closing phase, so the current control system has a low ability to suppress inrush current and overvoltage in actual operation

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