Control pulse train generation method and device for thyristor control

Abstract

The invention discloses a control pulse train generation method and device for thyristor control, and the method comprises the steps: S1, receiving a control parameter for controlling a target thyristor, generating a plurality of narrow pulses with the pulse widths smaller than a specified width according to the received control parameter, and obtaining and outputting a narrow pulse train; S2, performing interference pulse filtering processing on the narrow pulse train obtained in the step S1, and outputting the narrow pulse train obtained after filtering processing; S3, controlling narrow pulses in the narrow pulse train output in the step S2 after filtering treatment to be regenerated into pulses with required widths in sequence to obtain a final control pulse train, and outputting the final control pulse train to the target thyristor. The device comprises a narrow pulse group generation module, an interference pulse filtering module and a pulse group regeneration module. The methodhas the advantages of being simple in implementation method, low in cost, high in generation precision, flexible to implement, capable of ensuring thyristor triggering performance and the like.

Description

technical field [0001] The invention relates to the technical field of thyristor control, in particular to a control pulse group generation method and device for thyristor control. Background technique [0002] The starting control of the thyristor is realized by generating a pulse signal through the controller, and then sending the pulse signal to the thyristor. By generating and sending different control pulses, the conduction state of the thyristor can be controlled. There are usually a large number of thyristors in modules such as converters, so it is usually necessary to generate various forms of control pulse groups, that is, continuous pulses with different pulse widths, and if there is interference or wrong pulses in the generated pulse groups, it will cause It leads to false triggering of the thyristor, which seriously affects the stability and reliability of the system where the thyristor is located. [0003] At present, the control pulses for thyristors are usual...

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Problems solved by technology

[0004] 1. The narrow pulse generated based on the hardware circuit has high frequency and short high-level duration, which cannot be applied directly to applications requiring wider pulses based on the narrow pulse. For example, in the excitation control system of the microcomputer, the thyristor control pulse generated by the microcomputer It is some extremely narrow pulse groups, and in the process of hardware-in-the-loop simulation of equipment in rail transit vehicles, due to the limitation of actual system sampling time, the pulse width needs to meet certain requirements to ensure correct sampling and effectively trigger the thyristor , and if you want to use hardware circuits to generate control pulses that can satisfy the triggering of thyristors, the circuit implementation is more complicated, resulting in higher implementation costs;

[0005] 2. In the process of generating narrow pulses based on hardware circuits, due to the influence of hardware circuits, it is actually difficult to ensure the correctness of pulses, and it is easy to generate interference pulses. At present, pulses are usually filtered or compensated at the source of pulse generation to improve The false trigger rate of the pulse, but this type of method also needs to modify the hardware circuit or modulation method, etc., which will further increase the complexity of the implementation

[0006] 3. Based on the narrow pulse generated by the hardware circuit, when the actual pulse is collected, due to the limitation of the sampling time, it is easy to miss the sampling or collect the interference pulse, resulting in incorrect rectification output waveform, resulting in the excitation system not working properly

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