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Electric and thermal combined aging test method and system of large power thyristor

An aging test, thyristor technology, used in the measurement of electricity, measurement of electrical variables, single semiconductor device testing and other directions

Pending Publication Date: 2018-11-27
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above problems existing in the prior art that the failure mode and failure rate parameters of newly developed equipment cannot be obtained from statistical methods, the present invention provides a high-power thyristor electrothermal combined aging test method and system

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  • Electric and thermal combined aging test method and system of large power thyristor
  • Electric and thermal combined aging test method and system of large power thyristor
  • Electric and thermal combined aging test method and system of large power thyristor

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Embodiment 1

[0136] The present invention proposes a high-power thyristor electrothermal combined aging test method, comprising the following steps:

[0137] (1) Heat accelerated aging test;

[0138] (2) di / dt accelerated aging test;

[0139] (3) Voltage accelerated aging test.

[0140] The step (1) mainly includes the following content: in actual operation, the heating of the thyristor is caused by the large current passing through, and the current waveform of the thyristor in the DC project is as follows: figure 2 shown. In the figure, within a power frequency cycle, the conduction time of the thyristor is 1 / 3 cycle, and the blocking time is 2 / 3 cycle. For this, there are two methods for the thermally accelerated aging test of the thyristor, one is continuous conduction acceleration Aging test methods, one is to increase the current amplitude 1 / 3 cycle conduction heat accelerated aging test method.

[0141] Obviously, if the continuous conduction heat accelerated aging test method i...

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Abstract

The invention relates to an electric and thermal combined aging test method and system of a large power thyristor. The method comprises that test data processed by group is obtained according to a thyristor electric and thermal combined aging test; relation between the service life and influential factors of the thyristor under a constant stress is calculated according to the test data processed by group; and influential factors of the service life of the thyristor under the single constant stress are determined according to the relation. Thus, influence of certain factor on the service life of the thyristor can be obtained from a test result, the service life of the thyristor is evaluated, the thyristor as key component can be more reliable, the service life of a converter valve can be optimized and designed, safe and reliable operation of the converter valve is ensured, the using requirement for increasingly large power transmission capacity can be met, and the engineering application value is high.

Description

technical field [0001] The invention belongs to an ultra-high voltage direct current transmission converter valve in power electronics, and in particular relates to a high-power thyristor electrothermal combined aging test method and system. Background technique [0002] With the increase of DC projects and the expansion of grid scale, enterprises have put forward more and more stringent requirements for the reliability indicators of DC transmission systems. The converter valve is the core equipment of the DC transmission project, and it is the functional component of the AC-DC power conversion. In order to avoid the adverse effects caused by forced power failure, the reliability of the converter valve is also clearly required. As a key component of the converter valve, thyristor failure analysis and accelerated life test not only play an irreplaceable practical role in evaluating the reliability of the converter valve and improving product quality, but also serve as the wo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/26
CPCG01R31/263
Inventor 盛财旺高冲周建辉张娟娟张静廖巍董巍巩少岩李婷婷王航
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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