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Fault monitoring and forecasting method of direct current (DC)-direct current (DC) power source system

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: 2012-08-01
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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  • Fault monitoring and forecasting method of direct current (DC)-direct current (DC) power source system
  • Fault monitoring and forecasting method of direct current (DC)-direct current (DC) power source system
  • Fault monitoring and forecasting method of direct current (DC)-direct current (DC) power source system

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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] 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.

[0027] figure 1 , figure 2 with image 3 It is a specific implementation manner of monitoring a fault in a DC-DC power supply system during operation.

[0028] ...

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Abstract

Disclosed is a fault monitoring and forecasting method of direct current (DC)-direct current (DC) power source system, which includes the following steps: combining with electrical characteristics of a DC-DC power source system, respectively providing criterions for power sources when faults occur and when faults are about to occur based on the monitoring and analysis for output voltage of the DC-DC power source system; and beginning to monitor the output voltage after the DC-DC power source system powers on and when the output voltage achieves a steady state and, and monitoring or forecasting the faults based on the criterions. The method has the advantages of being capable of determining the faults which occur to the DC-DC power source system in real time, providing the DC-DC power source system barrier state in three determining clock cycle, and being rapid in alarming and capable of protecting the DC-DC power source system and the load of the system well when faults occur to the DC-DC power source system.

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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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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