Power converter failure rate distribution method based on optimized cost function
A technology of power converter and cost function, applied in the field of power converter failure rate allocation based on optimized cost function, can solve problems such as component failure rate allocation, and achieve the effects of optimizing cost, high practicability, and improving accuracy
Active Publication Date: 2014-07-23
SOUTH CHINA UNIV OF TECH
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[0003] In order to solve the current problem of power converter component failure rate allocation, a power converter failure rate allocation method based on an optimal cost function is proposed
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[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but the implementation of the present invention is not limited thereto.
[0020] Such as figure 1 As shown, it is a process flow of a power converter failure rate allocation method based on an optimized cost function, which takes into account the importance of components in the power converter while using the cost function to allocate the failure rate of power converter components. The cost and importance are taken into consideration at the time of allocation, and this allocation method has an effect that could not be achieved before.
[0021] In the specific implementation, the structure of the power converter is analyzed first, and the actual topology of the power converter is abstracted into a complex network model. In the complex network model, the nodes are the electronic components of the power converter, and the edges are the wires connecting each ...
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The invention relates to a power converter failure rate distribution method based on an optimized cost function. The method includes the steps that firstly, the structure of a power converter is analyzed, the actual topology of the power converter is abstracted to be a complex network model, an importance degree evaluation matrix of elements is established according to the complex network model, and then the importance degree of the elements of the power converter is obtained; function fitting is carried out according to existing discrete failure rate-cost data, then the failure rate-cost function of the elements is obtained, the improved cost function of the power converter and related constraint conditions are established on the basis of the failure rate-cost function, the cost function is resolved, and the failure rate shared by the elements is obtained. The method takes the importance degree of the elements in the power converter into consideration, the total cost is optimized on the premise that the power converter reaches the expect failure rate index, and the operation quality of the power converter is ensured.
Description
technical field [0001] The invention relates to power electronic converters and reliability engineering, in particular to a power converter failure rate distribution method based on an optimized cost function. Background technique [0002] At present, power converters are widely used in many fields such as material processing, surface treatment, power transmission, power quality control, and new energy power conversion due to their energy-saving, high-efficiency, and excellent performance. Practice has proved that the influence of each component in the power converter on the failure of the system is different. The failure of some components will cause the system to collapse, and the failure of some components will only cause a slight deviation in the output. The importance of components reflects the importance of each component of the power converter. A quantitative manifestation of the degree, it refers to the degree of influence on the failure of the entire power converter...
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IPC IPC(8): H02M1/00
Inventor 杜贵平方俊翔
Owner SOUTH CHINA UNIV OF TECH