Dynamic switching circuit of electromechanical synchronous switch of capacitor and control method of dynamic switching circuit

Abstract

The invention relates to an electromechanical synchronous switching technique of a capacitor, in particular to a circuit capable of achieving dynamic switching of an electromechanical synchronous switch and a control method of the circuit. The dynamic switching circuit of the electromechanical synchronous switch of the capacitor comprises the electromechanical synchronous switch arranged between a power grid and the capacitor, sampling circuits used for tracking voltage waveform changes of the two ends of the electromechanical synchronous switch respectively and a signal processing module arranged between a controller and the ends; the two ends are directly connected with the signal processing module separately, and the controller is used for receiving a switch-on or switch-off instruction of an upper computer and further connected with the trigger driving circuit end of the electromechanical synchronous switch. Accordingly, the switching response lag problem existing in the prior art is solved, and continuous dynamic switching is achieved.

Description

technical field [0001] The invention relates to a capacitor electromechanical synchronous switching technology, in particular to a circuit for realizing dynamic switching of an electromechanical synchronous switch and a control method thereof. Background technique [0002] As we all know, the power grid changes the reactive power by changing the capacity of the shunt capacitor, which is the most basic and widely used economical and effective method for reactive power compensation. The most important components in equipment with functions such as utilization efficiency, reducing power grid loss, and improving power supply quality are capacitors and capacitor switching switches (referring to switching equipment for switching capacitors in reactive power compensation devices), and capacitor switching The performance of the switch directly affects the service life and compensation effect of the capacitor, so its performance is very important. [0003] A capacitor is a capacitiv...

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Problems solved by technology

[0012] The technology disclosed in CN20214286 can only realize fast switching of the first and second states, and for the third state, the phase selection switch (in order to avoid inrush current) must wait for the capacitor to be fully discharged before performing zero-crossing input; according to According to the actual measurement, the above-mentioned waiting time will be about 2 minutes, which makes the switching response of the synchronous switch lag and cannot complete continuous dynamic switching

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