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Method for measuring stator open circuit transient time-constant of synchronous generator

A synchronous generator, open-circuit transient technology, applied in the direction of motor generator testing, etc., can solve the problems of high measurement safety requirements, large test workload, etc., achieve simple test process, solve complex wiring, high economical and The effect of practical value

Active Publication Date: 2014-05-28
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0005] In order to solve the problems in the existing excitation system modeling process, the traditional method of measuring the open circuit transient time constant of the generator stator generally needs to change the wiring of the primary circuit, so that the measurement safety requirements are high and the test workload is relatively large. A Measuring Method of Stator Open Transient Transient Time Constant of Synchronous Generator

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  • Method for measuring stator open circuit transient time-constant of synchronous generator
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  • Method for measuring stator open circuit transient time-constant of synchronous generator

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Embodiment Construction

[0027] First of all, it needs to be explained that for synchronous generators, especially the self-shunt excitation system, the excitation voltage of the generator is output by the excitation regulator, which is input to the rotor circuit of the generator for excitation, and the output voltage of the generator is output by the stator .

[0028] see figure 1 , the measuring method of synchronous generator stator open-circuit transient time constant of the present invention, comprises the steps:

[0029] First, let the synchronous generator under test run under no-load conditions, adjust the output voltage of the synchronous generator to be less than the rated output voltage of the synchronous generator, and make the excitation regulator run in the automatic channel. In order to obtain better measurement results, the output voltage of the synchronous generator is preferably 50% to 70% of the rated output voltage of the synchronous generator. This is because, when the voltage of...

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Abstract

In order to solve the problems in the modeling process of an existing excitation system that a measurement safety requirement is high and test work load is large due to the fact that a traditional method for measuring a transient time-constant of a generator stator open circuit generally requires changing a circuit wiring for one time, a method for measuring the stator open circuit transient time-constant of a synchronous generator is provided. According to the method, a generator no-load simulation system is established based on a matlab / simulink platform, practically measured exciting voltage of a synchronous generator serves as input, a generator output voltage curve is simulated and obtained, a practically measured curve and the simulation curve of the output voltage of the generator are compared, and the transient time-constant of the synchronous generator stator open circuit is obtained through fitting. The measurement method combining a test and simulation fitting, the problems of complex wiring and low result accuracy of the traditional test method are effectively solved, and high economy and practical value are achieved.

Description

technical field [0001] The present invention relates to the technical field related to power system operation and measurement, and furthermore, relates to a method for measuring the stator open-circuit transient time constant of a synchronous generator, especially a synchronous generator stator open-circuit transient time constant using a self-shunt excitation system In order to solve the measurement problem of generator stator open-circuit transient time constant in the process of excitation system modeling. [0002] Background technique [0003] With the development of the economy, the scale of power grid interconnection continues to grow, and the speed of power supply construction is also accelerated simultaneously. The safety and stability of large-capacity generating units in grid-connected operation is related to the safety and stability of the entire power grid, and the excitation system of these units plays a vital role in the stable operation of the units. Therefo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/34
Inventor 戴申华何晓伟赵龙罗亚桥桂国亮郑国强高博谢毓广徐斌丁津津
Owner STATE GRID CORP OF CHINA
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