Inverse soft instrument of synchronous generator

A synchronous generator and inverse soft technology, applied in the field of inverse soft instruments, can solve problems such as non-targeted indirect measurement methods, and achieve the effect of good practical value, easy engineering realization and high precision

Inactive Publication Date: 2008-11-12
SOUTHEAST UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

For more complex synchronous generator models (such as practical 4th order models), there is currently no targeted indirect measurement method

Method used

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  • Inverse soft instrument of synchronous generator
  • Inverse soft instrument of synchronous generator
  • Inverse soft instrument of synchronous generator

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Experimental program
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Embodiment Construction

[0023] First determine the directly measurable output and key variables to be measured; then establish the model of the sensor in the synchronous generator; then establish the inverse model of the sensor (ie, the inverse of the sensor); finally, realize the inverse based on the inverse of the sensor. Soft instrument, and connect the inverse soft instrument in series after the synchronous generator to realize the key to be measured (d-axis current component I d , Q-axis current component I q , Q-axis transient potential E′ q , D-axis transient potential E′ d And power angle δ) online real-time measurement.

[0024] The specific implementation of the inverse soft instrument is divided into the following 4 steps:

[0025] 1 Determine the directly measurable output variables and key variables to be measured for the synchronous generator.

[0026] The mathematical model of the synchronous generator (practical 4-order model) is:

[0027] δ · ...

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Abstract

An inverse soft meter for a synchronous generator is disclosed, which is the inverse soft meter that can measure the key variable to be tested in the synchronous generator on line in a real-time way and is applied to the high-performance monitoring system and controller design of an electric power system. The device consists of an inverse arithmetic unit (41), a first differentiator (421), a second differentiator (422) and a third differentiator (423). The input terminals (from B1 to B9) of the inverse arithmetic unit (41) are respectively connected with a first output terminal (A1) of a synchronous generator (1), the output terminal of the first differentiator (421), a second output terminal (A2) of the synchronous generator (1), the output terminal of the second differentiator (422), a third output terminal (A3) of the synchronous generator (1), the output terminal of the third differentiator (423), a fourth, fifth, sixth output terminals (A4, A5, A6) of the synchronous generator (1); the outputs ( B10, B11, B12, B13, B14) of the inverse arithmetic unit (41) are current components of axis-d and axis-q, transient electric potential of axis-q and transient electric potential and power angel of axis-d of the synchronous generator (1) respectively.

Description

Technical field [0001] The present invention is an inverse soft instrument for online real-time measurement of some key variables to be measured in a synchronous generator. The key variables to be measured include all variables in the synchronous generator that are difficult to directly measure online in real time, that is, the d-axis current component, The q-axis current component, the q-axis transient electric potential, the d-axis transient electric potential and the power angle belong to the technical field of power system measurement. Background technique [0002] The synchronous generator is one of the most important and complex components in the power system. Due to technical or economic reasons, there are some variables in the synchronous generator, such as the d-axis current component I d , Q-axis current component I q , Q-axis transient potential E′ q , D-axis transient potential E′ d At present, it is still difficult to measure the sum power angle δ directly online and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/34
Inventor 张凯锋戴先中
Owner SOUTHEAST UNIV
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