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A dc-dc power system fault monitoring and prediction method

A DC-DC and power system technology, applied in the field of DC-DC power system fault monitoring and prediction, can solve problems such as the difficulty of constructing fault trees, easy omissions in analysis, and inability to clearly analyze fault mechanisms, etc.

Active Publication Date: 2016-09-14
CAPITAL NORMAL UNIVERSITY
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Problems solved by technology

However, these methods also have the disadvantages of not being able to clearly analyze the fault mechanism and the difficulty of constructing a fault tree; and because the causal relationship between events is not a simple affirmative or negative relationship (1 or 0), the analysis is based on the fault tree prone to omission

Method used

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  • A dc-dc power system fault monitoring and prediction method
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  • A dc-dc power system fault monitoring and prediction method

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] Figure 1 to Figure 9 Among them, X is the standard output of the DC-DC power supply system, UCL and LCL are the upper control boundary and lower control boundary for judging whether to cross the ±3σ boundary, respectively, and the range of A area is between -3σ and -2σ or between +2σ and +3σ , the range of area B is between -2σ and -1σ or between 1σ and 2σ, and the range of area C is between -1σ and 0 or between 0 and +1σ. When the DC-DC power system is running in a steady state, the ±1σ, ±2σ and ±3σ boundaries can be calculated according to the ±1%, ±5% and ±10% of its output voltage, respectively, and the DC-DC power system faults The monitoring and forecasting provide a basis for judgment.

[0024] figure 1 , figure 2 and image 3 It is a specific implementation manner of monitoring a fault in a DC-DC power supply system during operation.

[0025] ...

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Abstract

A DC-DC power system fault monitoring and prediction method, the method comprises the following steps: (1) in combination with the electrical characteristics of the DC-DC power system, based on the monitoring and analysis of the output voltage of the DC-DC power system, respectively give Judgment criteria when the DC-DC power system fails and when it is about to fail; (2) After the DC-DC power system is started, when the output voltage of the DC-DC power system reaches a steady state, it starts to monitor the output voltage, and monitors based on the judgment criteria failure or predicted failure. This method can judge the failure of the DC-DC power system in real time, and give the fault status of the DC-DC power system within three judgment clock cycles. The system itself and its load play a good role in protection.

Description

technical field [0001] The invention relates to a method for monitoring and predicting a DC-DC power supply system failure, in particular to a method for evaluating the health status of a DC-DC power supply system by using statistical theory. Background technique [0002] In recent years, as a new type of power supply, DC-DC power supply has been widely used in production and life due to its small size, light weight and high efficiency. Therefore, the loss caused by the failure of the DC-DC power supply system is also increasing day by day, but due to the lack of a unified fault model, the existence of component tolerances and nonlinear factors, it is difficult to solve it by using conventional or traditional fault diagnosis theories and methods fault diagnosis and fault prediction problems. [0003] At present, there are many methods for fault analysis of DC-DC power supply systems, such as modeling analysis of key components in DC-DC power supply systems, fault tree analy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/40
Inventor 关永周松文吴立锋潘巍王国辉
Owner CAPITAL NORMAL UNIVERSITY
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