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Power tube open-circuit fault detection and locating method

An open-circuit fault and localization method technology, applied in the field of detection, can solve the problems that the core component power tube is prone to failure, lack of portability and universality, etc., and achieves good universality, fast fault detection speed, and high positioning accuracy. Effect

Inactive Publication Date: 2016-11-16
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0002] The rectification, inverter and rectification-inverting integrated system are the most widely used energy conversion devices in the industry. The power tube, its core component, is prone to failure due to factors such as long-term high-frequency on-off and withstand voltage shocks. Currently, there are Most of the literature is a separate study on rectification, inverter and its integrated system, the existing methods are only effective for a single specific system, lack of effective portability and universality

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  • Power tube open-circuit fault detection and locating method
  • Power tube open-circuit fault detection and locating method
  • Power tube open-circuit fault detection and locating method

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[0039] The specific implementation of the present invention will be described in detail below in conjunction with the accompanying drawings. As a part of this specification, the principles of the present invention will be described through examples. Other aspects, features and advantages of the present invention will become clear through the detailed description. In the referenced drawings, the same reference numerals are used for the same or similar components in different drawings. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0040] Such as figure 1 As shown, assuming that there is a phase difference between the two signal streams, such as figure 1 As shown, the cycle of the signal flow is 0.2s, and the sampling point of the unit cycle system is L=l 1 +l 2 +l 3 , which is zero-crossed from top to bottom p 1 a...

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Abstract

The invention discloses a power tube open-circuit fault detection and locating method. The state of health or the fault topological structure of the system is located and determined by using a similarity measurement method, then a fault bridge arm is determined by the percentage of the number of sampling points near the current zero point in the number of the sampling points of one period, and finally a power tube is located by current periodic integral polarity. The power tube open-circuit fault detection and locating method is suitable for any rectification, inversion and rectification and inversion integrated systems. The method is real-time online, rapid, highly robust and accurate.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a power tube open circuit fault detection and positioning method. Background technique [0002] The rectification, inverter and rectification-inverting integrated system are the most widely used energy conversion devices in the industry. The power tube, its core component, is prone to failure due to factors such as long-term high-frequency on-off and withstand voltage shocks. Currently, there are Most of the literature is a separate study on rectification, inverter and its integrated system, and the existing methods are only effective for a single specific system, lacking effective transplantability and universality. Contents of the invention [0003] Based on the above deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a real-time online detection algorithm for open circuit faults of power tubes with good portability and ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/02
CPCG01R31/50
Inventor 赵金吴锋马计划
Owner HUAZHONG UNIV OF SCI & TECH
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