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EMC evaluation model and Gamma-NSGA-II-based conduction interference trap multi-objective optimization design method

A multi-objective optimization and evaluation model technology, applied in the field of genetic algorithm and electromagnetic compatibility

Active Publication Date: 2019-08-16
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0009] Aiming at the deficiencies of the prior art, the present invention provides a multi-objective optimization design method of a conduction interference trap based on an EMC evaluation model and γ-NSGA-II, which is used to solve the problems of suppressing conduction interference, reducing device weight and Parameter optimization problem of cost notch filter

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  • EMC evaluation model and Gamma-NSGA-II-based conduction interference trap multi-objective optimization design method
  • EMC evaluation model and Gamma-NSGA-II-based conduction interference trap multi-objective optimization design method

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[0036] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0037] Taking the 12-pulse TRU power line conduction transmitter circuit as an example, the structure of the 12-pulse TRU is as follows: figure 1 As shown, the high transient voltage dv / dt and high transient current di / dt generated at the moment of switching the rectifier diode will cause serious conduction interference.

[0038] According to the measurement requirements in the standard [2], the 12-pulse TRU is measured in the 10kHz-10MHz frequency band, the input voltage is 115V / 400Hz, and the load current value is 150A. figure 2 The experimental spectrum diagram of the 12-pulse TRU power line conducted emission is shown, in which the red curve is the conducted emission threshold curve specified by the standard, and the blue curve is the conducted emission signal measured according to the standard. It is obvious that the conducted emission of the power line exceed...

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Abstract

The invention discloses an EMC evaluation model and Gamma-NSGA-II-based conduction interference trap multi-objective optimization design method and relates to the field of electromagnetic compatibility and a genetic algorithm improvement strategy. An EMC evaluation model is established on the basis of a BP neural network, and a conduction emission signal margin value and a total harmonic distortion rate which represent a conduction interference suppression effect are calculated. By taking the margin value, the total harmonic distortion rate, the weight of the wave trap and the cost as optimization objectives, an optimization objective vector Gamma containing an objective importance order is introduced. The Gamma-NSGA-II algorithm is used to continuously evolve the optimal parameters of interference trap. Compared with NSGA-II, when the critical layer individuals are selected, dimensionality reduction is performed on the optimization target vectors according to importance, then rapidnon-dominated sorting is carried out on the critical layer individuals. The trap parameter optimization design method provided by the invention can be selected for inhibiting conduction interference,reducing the weight of the trap, reducing the cost and the like, and is high in scientificity and good in practicability.

Description

technical field [0001] The invention relates to the field of electromagnetic compatibility and the application field of genetic algorithm. Background technique [0002] On the one hand, the electromagnetic interference of power supply equipment will cause harmonic pollution to the power supply grid, on the other hand, it will affect the quality of power supply, and even cause the load to fail to work normally. Therefore, its electromagnetic compatibility must meet the requirements of relevant industrial standards. The electromagnetic interference signal below 10MHz usually propagates in the form of conducted interference, so the electromagnetic interference of power supply equipment is mainly conducted interference. [0003] Usually, installing a notch filter on the power supply side to filter out the conducted emission signal of a specific frequency can prevent the interference generated by the equipment from being conducted to the power grid side through the power line. A...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06N3/04G06N3/08G06N3/12
CPCG06N3/08G06N3/126G06F30/20G06N3/044G06N3/045
Inventor 马莹葛红娟张璐桑益芹李煌李静
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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