Fault Diagnosis Method and Device for Turbine Generator Rotor Winding Based on Diagnosis Model
A technology for turbine generators and rotor windings, applied in motor generator testing, electrical digital data processing, instruments, etc., can solve problems such as rough equivalent results and large differences in port functions, and achieve the goal of improving reliability and accuracy Effect
Active Publication Date: 2019-08-02
NORTH CHINA ELECTRICAL POWER RES INST +1
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The equivalent result of this equivalent model is quite rough, and the port function derived from it is quite different from the actual situation
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[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.
[0049] Aiming at the existing short-circuit fault diagnosis method of generator rotor winding, the equivalent model of double-conductor transmission line is adopted, and the equivalent result is quite rough, resulting in a large difference between the port function and the actual situation, which leads to inaccurate diagnosis results. The inventor creatively The transmission line equation of the generator rotor winding is established by using the multi-conductor transmission line (Multi-conductor Transmission Line, MTL) theory, and the fault matrix is used to describ...
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The invention provides a turbine generator rotor winding fault diagnosis method based on a diagnosis model and a turbine generator rotor winding fault diagnosis device thereof. The method comprises the steps that multiple equivalent conductors of corresponding rotor windings and the fault matrix of the rotor windings are constructed according to the rotor parameters of a turbine generator, and a transmission line equation of the rotor windings in the fault-free state and the fault state is established through a multiconductor transmission line method; and a fault diagnosis model is established by using the transmission line equation in the fault-free state and the fault state, and fault diagnosis is performed on the turbine generator under diagnosis by using the fault diagnosis model. The more accurate fault diagnosis model is established based on the multiconductor transmission line method so that the accuracy of fault diagnosis of the rotor windings of the turbine generator can be enhanced.
Description
technical field [0001] The invention relates to the technical field of generators, in particular to a method and device for diagnosing faults of turbine generator rotor windings based on a diagnosis model. Background technique [0002] Rotor winding short circuit is a common fault of large generators, which poses a serious threat to the safe and stable operation of large generator sets. At present, there are many fault diagnosis methods for inter-turn short circuit and ground short circuit of rotor winding, including subpackage voltage drop method, AC impedance method, repetitive pulse oscilloscope method (Repetitive Surge Oscilloscope, RSO), online magnetic flux monitoring method, etc. Among them, the RSO method essentially uses the port electrical characteristics of the rotor winding for fault diagnosis. [0003] The rotor of a turbine generator generally adopts a hidden pole structure, and each coil of the rotor excitation winding is respectively embedded in the rotor sl...
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IPC IPC(8): G01R31/34G06F17/50
CPCG01R31/34G16Z99/00
Inventor 雷雨孙士涛王劲松龙飞张杰
Owner NORTH CHINA ELECTRICAL POWER RES INST