Novel method for triggering thyristor for converter valve module test

A converter valve module and thyristor technology, which is applied in the direction of output power conversion device, single semiconductor device test, measurement device, etc., can solve the problems that the converter valve module cannot be used as a trigger technology and increase complexity, etc., so as to achieve the authenticity and reliability of the test , the effect of preventing interference

Active Publication Date: 2011-04-13
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] Patent CN95207179.7 describes the design of an intelligent thyristor trigger board, which is characterized by a microcomputer host as the core, equipped with multiple analog switches, a conduction angle detection circuit, and an indicator light for operation and failure.

Method used

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  • Novel method for triggering thyristor for converter valve module test
  • Novel method for triggering thyristor for converter valve module test
  • Novel method for triggering thyristor for converter valve module test

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[0020] The present invention will be further described below in conjunction with the drawings and embodiments.

[0021] See attached figure 1 , In order to ensure that the trigger pulse can be sent when the anode and cathode of the thyristor are at positive voltage, the voltage applied to the thyristor is detected by the voltage zero-crossing detection circuit, thereby generating a synchronization signal. The synchronization signal is sent to the VBE. After receiving the synchronization signal, the VBE generates a trigger code pulse. The trigger code pulse is transmitted to the TE through the optical fiber. After the TE receives the pulse, it decodes and generates it through the power amplifier to enable the thyristor to trigger the guide. The applied voltage and current are sent to the thyristor to turn on the thyristor.

[0022] In this design, the synchronization signal generating circuit and VBE are in the control room, at low potential, and isolated from the operating environm...

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Abstract

The invention relates to the field of power system devices, in particular to a novel method for triggering thyristor for converter valve module test. The triggering method adopts a digital triggering technology, and VBE (Valve-Based Equipment) receives a synchronous signal and can generate a triggering coded pulse with any phase angle which can be conveniently and flexibly adjusted according to the synchronous signal. The reliable triggering of a thyristor under a low voltage is a basis for ensuring the normal and reliable operation of a converter valve and needs two conditions: (1) the voltage difference between the anode and the cathode of the thyristor is a positive voltage, and (2) the thyristor can be triggered and conducted only when the triggering pulse is received. The triggering pulse for reliably triggering the thyristor under a low voltage is provided by TE (Thyristor Electronics), a low-voltage circuit provides the TE with energy for normal work, the TE receives and decodes the triggering coded pulse from the VBE and then provides a voltage and a current to trigger and conduct the thyristor through a power amplifier so as to trigger and conduct the thyristor.

Description

technical field [0001] The invention relates to the field of power system devices, in particular to a thyristor triggering method for a novel converter valve module test. Background technique [0002] The thyristor is the most important component of the converter valve. Its reliability trigger is the key to ensure the normal operation of the converter valve. During the normal operation of the converter valve, it will be subject to various disturbances from the outside world. The trigger circuit of the thyristor is affected, so that the thyristor cannot be triggered normally. The DC transmission converter valve is composed of multiple sets of thyristors in series. If one thyristor cannot be normally triggered and turned on, the voltage will be shared among the remaining series thyristors, which will cause overvoltage of these thyristors. In severe cases, it may cause damage to the thyristors. , it can be seen that it is particularly important to trigger the thyristor normall...

Claims

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Application Information

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IPC IPC(8): H02M1/06G01R31/26G01R31/00
Inventor 汤广福王华锋陈龙龙
Owner CHINA ELECTRIC POWER RES INST
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