A polythyristor synchronous optical pulse trigger circuit

Abstract

A multi-thyristor synchronous optical pulse trigger circuit, including a main controller, an optical pulse trigger and a thyristor connected to the output end of the optical pulse trigger, and also includes a backup controller, an optical pulse detector and a second optical pulse trigger, the main The thyristor-triggered optical pulse signal generated by the controller is connected to the optical pulse trigger through the optical fiber transmission line, and the backup controller generates the corresponding thyristor-triggered optical pulse signal through the optical fiber transmission line to connect to the second optical pulse trigger. The second optical pulse trigger is connected, and the other end of the optical pulse detector is connected to the main controller and the standby controller through an optical fiber transmission line, and a cascade line is provided between the optical pulse trigger and the second optical pulse trigger. The device has the characteristics of simple circuit structure, long transmission distance, high stability and reliability, strong anti-interference ability and low production and maintenance costs, and can better meet the requirements of thyristor series, parallel or in-phase anti-parallel connection in high-power and high-voltage thyristor converter systems. Synchronous triggering of polythyristors in rectification mode.

Description

technical field [0001] The invention relates to a thyristor light pulse trigger circuit, in particular to a multi-thyristor synchronous light pulse trigger circuit in the thyristor series, parallel or in-phase anti-parallel rectification working mode in a high-power high-voltage thyristor conversion system. Background technique [0002] In the high-power thyristor converter system, due to the large output current and voltage, the main circuit valve arm often uses multiple thyristor elements to work in parallel or in series. In the device, the main circuit also often adopts the same-phase anti-parallel circuit connection mode. These systems all require multiple thyristor devices connected in series, parallel or anti-parallel of the same conductive group to be able to trigger and turn on simultaneously at the same time stably and reliably. [0003] High-power thyristor converter devices generally work under the conditions of strong AC and DC current and higher voltage levels,...

AI Technical Summary

Problems solved by technology

The trigger circuit can not only solve the problems of short transmission distance, easy attenuation, and susceptibility to electromagnetic interference of electric pulse signals in the transmission process, but also realize synchronous triggering of multiple strings and parallel thyristors through cascade triggering, and realize dual-channel The hot standby redundant function of the optical pulse input signal as backup for each other has the characteristics of simple circuit structure, long transmission distance, high stability and reliability, strong anti-interference ability and low production and maintenance costs

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