Novel monitoring and protecting system for test thyristor of converter valve module

Abstract

The invention relates to the field of power system devices, in particular to a novel monitoring and protecting system for a test thyristor of a converter valve module. The system provided by the invention comprises thyristor electronic equipment (TE), valve-based electronic equipment (VBE), a control protection system and the like. The control protection system computes the triggering angle of the thyristor according to the current operation condition of a converter valve and sends the triggering angle to the VBE, the VBE generates a triggering coded pulse and sends the triggering coded pulse to the TE, and the TE generates a triggering pulse and sends the triggering pulse to the thyristor, thereby triggering the thyristor. The TE generates a monitoring and protecting return pulse according to the state of the thyristor, the return pulse is transferred to the VBE through an optical fiber, the VBE gathers the uploaded state information, then the gathered information is uploaded to the control protection system through a CAN (Controller Area Network) bus, and the control protection system finishes the process of monitoring the state information of the valve module thyristor level. In the normal operation process of the converter valve, if the voltage received by the thyristor exceeds the tolerance capability of the thyristor, the thyristor can be damaged possibly, thus the protection technology of the thyristor is very important. The control protection system, the VBE and the TE finish the protection of the normal operation of the converter valve module.

Description

technical field [0001] The invention relates to the field of power system devices, in particular to a novel converter valve module test thyristor monitoring and protection system. Background technique [0002] The monitoring and protection system of the converter valve is the core of its connection with peripheral equipment and thyristors, and its basic principle is shown in the block diagram. By receiving the trigger angle signal from the valve control unit (VC), the trigger code pulse is generated by the valve base electronic equipment (VBE), and sent to the thyristor electronic equipment (TE). After receiving the trigger code pulse, TE generates a trigger signal and sends the signal Applied to the gate of the thyristor so that the thyristor triggers normally. At the same time, TE returns the relevant state information of the thyristor to VBE, and VBE analyzes and summarizes the signal, and then sends it back to VC, so as to achieve the purpose of monitoring the state inf...

AI Technical Summary

Problems solved by technology

The thyristor valve triggering and detection system involved in this patent uses a computer and a control protection system to trigger, monitor and protect the thyristor valve. The system design is complex, there are many redundant items, and the amount of information transmission is large, which is easy to cause failure.

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