Monitoring control device and system for simulating commutation failure test

Abstract

The invention discloses a monitoring control device and system for simulating a commutation failure test. The device comprises a backplane, a communication board, a main control board, a GPS synchronization board and at least one trigger monitoring board, wherein the communication board, the main control board, the GPS synchronization board and the trigger monitoring board are all arranged on thebackplane; the GPS synchronization board is used for receiving a GPS signal, producing a clock signal according to the GPS signal, and transmitting the clock signal to the communication board, the main control board, the GPS synchronization board and the trigger monitoring board; the main control board is used for acquiring operation parameter data of a tested circuit through the communication board, analyzing according to the operation parameter data to generate a trigger signal and sending the trigger signal to the trigger monitoring board; the trigger monitoring board is used for sending apulse trigger signal to the tested circuit according to the trigger signal, receiving a monitoring signal fed back by the tested circuit and sending the monitoring signal to the main control board. The device provided by the invention is not controlled by a microcomputer, the problem of easy halt in the operation process is solved, and the device is low in price and easy to maintain.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a monitoring and control device and system for simulating commutation failure tests. Background technique [0002] With the increasing number of DC transmission projects put into operation in China, the problem of commutation failure in inverter stations has become prominent. The root cause of commutation failure lies in the semi-controlled characteristics of thyristor components. The opening of thyristors can be controlled by trigger pulses, but it must be controlled Reverse voltage is applied for a period of time to dissociate the carriers in the thyristor and restore the blocking ability, so that it can be turned off reliably. If the reverse voltage is applied for too short a time, the thyristor will turn back on without a trigger pulse once it is subjected to a forward voltage. Commutation failure will cause problems such as DC bias of the converter transformer, overheating of t...

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the disadvantages of digital simulation system RTDS and RTLAB equipment in the prior art relying on microcomputer control, easy to crash during software operation, high price, and difficult maintenance, thereby providing a digital simulation system. Monitoring and control device and system for phase failure test

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