Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Current interrupt protection test method for direct current converter valve thyristor

A DC converter valve and current intermittent technology, which is applied in circuit breaker testing, single semiconductor device testing, etc., can solve the problems of high voltage, inability to test single-stage thyristor, limited number of DC intermittent, etc., and achieves easy operation. , the effect of simple and easy test circuit

Active Publication Date: 2013-12-18
CHINA ELECTRIC POWER RES INST +1
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The test method mentioned in the patent application is to test the valve module of the DC converter. Since a high-voltage test device is required for adjustment, the generated voltage is relatively high, and the single-stage thyristor cannot be tested. The number of DC intermittents is also limited

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Current interrupt protection test method for direct current converter valve thyristor
  • Current interrupt protection test method for direct current converter valve thyristor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] This technical scheme designs a thyristor current intermittent test circuit, and its principle is as attached figure 1 shown. The test circuit is composed of AC power supply, isolation transformer, IGBT module and test platform. The AC power supply connects the AC voltage to the anode and cathode of the thyristor test product through a voltage regulator and isolation transformer. The first IGBT1 and the second IGBT2 in the control circuit of the test platform are turned on and off, thereby controlling the voltage waveform applied to the thyristor. After the test platform sends a trigger code pulse to TE at the same time, it is decoded and generates a pulse that can trigger the thyristor. The test can be completed through timing control.

[0019] The timing control and thyristor voltage waveform designed by the invention are as attached figure 2 As shown in the figure, the voltage and current waveforms under the control timing of the figure, when the voltage at both e...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the field of power system devices, in particular to a novel current interrupt protection test method for a direct current converter valve thyristor. The current interrupt protection means that: when a thyristor is positioned in a forward conduction region, if a current is interrupted, the thyristor is shut off due to the zero pass of the current; when bearing the forward voltage, the shut thyristor cannot be turned on instantly because thyristor electronic equipment (TE) does not send trigger pulse again, and if the voltages on the two ends of the thyristor are over high, the thyristor is even damaged; therefore, the general direct current converter valve thyristor electronic equipment (TE) is required to have the function of re-triggering the thyristor after the current interrupt. The test aims to verify the current interrupt protection function of the TE. In the invention, the controllable switching capability of an insulated gate bipolar transistor (IGBT) is used, and an interrupting current is generated by a circuit and applied to the thyristor electrode for carrying out the test.

Description

technical field [0001] The invention relates to the field of electric power system devices, in particular to a new test method for intermittent current protection of thyristors of DC converter valves. Background technique [0002] The intermittent current protection test is an important part of the routine test of the converter valve. Since the thyristor is the most basic and important component of the converter valve, its reliable operation is the prerequisite for ensuring the normal and reliable operation of the converter, so it must be guaranteed The converter valve can work reliably under various operating conditions. Current discontinuity means that when the thyristor is in the forward conduction range, if the current discontinuity occurs, the thyristor will be shut off due to the current zero crossing. Since the thyristor does not send the trigger pulse again, it cannot be turned on immediately when it is subjected to a forward voltage. If the voltage across the thyris...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/26G01R31/327
Inventor 查鲲鹏陈龙龙孙倩
Owner CHINA ELECTRIC POWER RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com