Open circuit fault detecting method for double rotating diode of aviation three-phase AC excitation system
A three-phase AC and excitation system technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problem that the fault detection method of the rotating rectifier cannot be applied to the three-phase AC excitation system, and the calculation amount depends on offline simulation data, etc., to achieve The effect of small amount of data calculation
Active Publication Date: 2019-04-09
XUCHANG UNIV
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[0013] Aiming at the problem that the existing rotating rectifier fault detection method based on the rotating armature DC excitation system cannot be applied to the three-phase AC excitation system, and the existing three-phase AC excitation system method needs model training, relies on offline simulation and has a large amount of data calculation , the invention provides a double-rotating diode open-circuit fault detection method for an aviation three-phase AC excitation system
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[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0031] refer to figure 1 , the double-rotating diode open-circuit fault detection method of the aeronautical three-phase AC excitation system provided in the embodiment of the present invention is a kind of online monitoring of the change of the harmonic component of the rotor current of the exciter to meet the requirements of the starting / generating system for the open-circuit fault of two rotating diodes. A new detection method for online monitoring and faul...
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The invention discloses an open circuit fault detecting method for a double rotating diode of an aviation three-phase AC excitation system and relates to the technical field of aviation AC motors. Themethod comprises the following steps of firstly obtaining a three-phase winding current of an exciter rotor; secondly filtering the obtained three-phase winding current of the exciter rotor to obtaina fundamental wave, a second harmonic, and a third harmonic of the three-phase current of the rotor; finally implementing a fault detection when a fault occurs according to open circuit fault characteristics of two rotating diodes of a rotating rectifier by monitoring amplitude changes in the fundamental wave, the second harmonic, and the third harmonic of the three-phase current of the rotor on-line. The method not only has a small amount of data calculation but also obtains state information of the rotating rectifier without a model training and an offline simulation. In addition, the method can detect open circuit fault of the two rotating diodes of the rotating rectifier in a static, electric, and power generation state of a three-stage brushless synchronous motor.
Description
technical field [0001] The invention relates to the technical field of aviation AC motors, in particular to a double-rotating diode open-circuit fault detection method and system for an aviation three-phase AC excitation system. Background technique [0002] With the rapid development of large aircraft technology, the high-voltage wide frequency conversion power generation system with the integrated function of starting and power generation is an important development direction of the future aviation AC power system. At present, most aircraft AC power systems in my country use three-stage brushless synchronous motors as generators. This type of generator does not have the function of starting aeroengines, and the engines require special starting equipment. If the rotating armature DC excitation system of the original three-stage brushless synchronous motor is replaced with a three-phase AC excitation system, and the three-stage brushless synchronous motor is controlled to ru...
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IPC IPC(8): G01R31/02
CPCG01R31/50
Inventor 张赞栗伟周李凌乐殷志锋马军磊吕存杰朱亚峰
Owner XUCHANG UNIV