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Aviation TRU output ripple voltage detection method

A voltage detection method and a technology for outputting ripple, applied in the direction of measuring current/voltage, measuring device, measuring electrical variables, etc., can solve problems such as burning out TRU windings, generating high-order harmonics, polluting aircraft power grids, etc., to prevent failures The effect of expanding the scope, ensuring safe work, and strong anti-interference ability

Pending Publication Date: 2021-04-16
SHAANXI AVIATION ELECTRICAL
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AI Technical Summary

Problems solved by technology

[0003] In actual use, the two three-phase full-bridge rectifier circuits of TRU play a vital role in the reliable operation of TRU. Any failure of one or more rectifier diodes will affect the output voltage of TRU and interfere with other power consumption. normal operation of the equipment
When a diode open-circuit or short-circuit fault occurs, the TRU output DC ripple voltage increases, generating high-order harmonics, polluting the aircraft power grid, and even burning out the TRU winding, which is not conducive to flight safety. Therefore, the detection of TRU ripple voltage is particularly important.
At present, TRU ripple detection is used for the first time on a civil aircraft, and its detection technology needs to be broken through

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  • Aviation TRU output ripple voltage detection method

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[0026] In order to make the objectives, technical solutions and advantages of the implementation of the application clearer, the technical solutions in the implementation modes of the application will be described in more detail below with reference to the drawings in the implementation modes of the application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the present application. The embodiments described below by referring to the figures are exemplary and are intended to explain the present application, and should not be construed as limiting the present application.

[0027] In addition, it should be noted that, unless otherwise specified and limited, words such as "installation", "connection" and "connection" used in the description of this application should be interpreted in a broad sense, for example,...

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Abstract

The invention belongs to the field of aviation power systems, and particularly relates to an aviation TRU output ripple voltage detection method. The method comprises the following steps: S1, extracting a pulsating alternating current ripple signal of an aviation TRU output voltage; S2, performing positive half-wave sampling on the pulsating alternating current ripple signal; S3, performing peak value sampling, and obtaining the peak value of the TRU ripple voltage; S4, performing voltage amplitude amplification; S5, carrying out isolation amplitude limiting; S6, performing differential amplification processing, filtering out common-mode noise, and changing the TRU ripple voltage into safe direct-current voltage within 0-3 V; and S7, sending to an AD sampling port of the DSP for sampling, and then performing aviation TRU output ripple voltage detection. The method can achieve the detection of the pulsating AC ripple in the TRU output DC voltage, is strong in anti-interference capability, is high in detection precision, facilitates the state monitoring of the TRU of an aviation power distribution system, achieves the quick isolation of a fault through system control, prevents the fault range from being enlarged, and facilitates the guaranteeing of the safe operation of other electric equipment.

Description

technical field [0001] The application belongs to the field of aviation power systems, and in particular relates to a detection method for output ripple voltage of an aviation TRU. Background technique [0002] At present, transformer rectifier (TRU) equipment is widely used in the secondary power supply system of aviation AC power supply system, which has the advantages of simple structure, reliable operation and strong overload capacity. The working principle of 12-pulse TRU is as follows: figure 1 As shown, it consists of a three-winding transformer and two three-phase full-bridge rectifier circuits. The primary side of the three-winding transformer and one of the secondary sides are connected in a star shape, and the other secondary side is connected in a delta shape. The rectifier circuit is drawn out through a balanced reactor. A pulsating DC voltage is obtained at the output. In the current aviation power system, the output voltage of the TRU equipment is not adjust...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00
Inventor 张桂芳王博孙建勤
Owner SHAANXI AVIATION ELECTRICAL
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