Test system and method for distortion parameters of AC voltage of aviation variable frequency power supply system

A technology of power supply system and AC voltage, applied in measurement devices, spectrum analysis, measurement of electrical variables, etc., can solve problems such as different frequency resolutions, and achieve the effect of ensuring accuracy

Inactive Publication Date: 2019-03-29
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an AC voltage distortion parameter testing system and method for aviation variable frequency power supply system, which can solve the problem of different frequency resolutions in different frequency bands

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  • Test system and method for distortion parameters of AC voltage of aviation variable frequency power supply system
  • Test system and method for distortion parameters of AC voltage of aviation variable frequency power supply system
  • Test system and method for distortion parameters of AC voltage of aviation variable frequency power supply system

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Embodiment Construction

[0037] The present invention will be described in further detail below in conjunction with the accompanying drawings, which are explanations rather than limitations of the present invention.

[0038] The invention relates to an AC voltage distortion parameter test system of an aviation frequency conversion power supply system, which includes a distortion test signal conditioning circuit and a PXI bus system. The distortion test signal conditioning circuit includes a connection terminal, an attenuator, a filter, a comparator, a phase-locked loop circuit, a signal generator and a subtraction circuit, and the AC signal is passed through the distortion test signal conditioning circuit to obtain a variable-frequency AC distortion voltage. The PXI bus system includes PXI-1065, zero-slot controller, PXI-6115 acquisition card, shielded cable, integrated display, keyboard and mouse, which are used to collect frequency-variable AC distortion voltage for analysis and processing. The freq...

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Abstract

The invention discloses a test system and method for distortion parameters of an AC voltage of an aviation variable frequency power supply system. The system comprises a distortion test signal conditioning circuit and a PXI bus system. The distortion test signal conditioning circuit comprises wiring terminals, attenuators, filters, comparators, phase-locked loop circuits, signal generators, and subtraction circuits. An AC signal is subjected to the distortion test signal conditioning circuit to obtain a variable frequency AC distortion voltage. The PXI bus system comprises a PXI-1065, a zero-slot controller, a PXI-6115 capture card, a shielded cable, an integrated display, a keyboard, and a mouse. The PXI bus system is used for capturing the variable frequency AC distortion voltage for analysis and processing. The test system and method have the advantages of solving the problem that the frequency resolutions of different frequency segments are different, effectively filtering out theinfluence of fundamental components on harmonic components when the fundamental frequency is changed, and ensuring the accuracy of each frequency component in the frequency spectrum analysis.

Description

technical field [0001] The invention belongs to the technical field of aviation electrical testing technology, and relates to an AC voltage distortion parameter testing system and method for an aviation frequency conversion power supply system. Background technique [0002] In the aircraft electrical system, the main power supply is usually three-phase 120V / 400HZ AC, and the load is precision electronic equipment, so the harmonic pollution is relatively serious. Nonlinear loads have a serious impact on the aircraft power system and power supply quality, so the power supply quality of the AC power supply has certain specifications. National Military Standard 181A "Aircraft Power Supply Characteristics" stipulates that the distortion coefficient shall not exceed 5%, so the AC distortion spectrum shall be regulated according to the requirements of the limit curve. At present, there are many spectrum analysis instruments at home and abroad for the measurement of distorted spect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R23/167
CPCG01R23/167
Inventor 雷涛张晓斌董延军
Owner NORTHWESTERN POLYTECHNICAL UNIV
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