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Method and System for Detection and Analysis of Subsynchronous Oscillation Signals of Large Generating Sets

A sub-synchronous oscillation and generator set technology, applied in the direction of motor generator testing, etc., can solve problems such as insufficient reliability, and achieve the effect of increasing reliability and accuracy

Active Publication Date: 2016-04-13
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is simple in structure and easy to maintain, but not reliable enough

Method used

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  • Method and System for Detection and Analysis of Subsynchronous Oscillation Signals of Large Generating Sets
  • Method and System for Detection and Analysis of Subsynchronous Oscillation Signals of Large Generating Sets

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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0026] Such as figure 1 , a subsynchronous oscillation signal detection and analysis system for a large generator set, including a rotational speed acquisition module 1, a steam pressure and temperature acquisition module 2, various voltage and current acquisition modules 3, an excitation current acquisition module 4, a correction module 5, and a mechanical torque Synthesis module 6 of electrical torque, synthesis module 7 of electrical torque, module 8 of torsional amplitude and frequency spectru...

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Abstract

The invention provides a method and a system for detecting and analyzing subsynchronous oscillation signals of a large generator set. The method comprises the steps as follows: rotating speed signal collection and correction, torsional oscillation amplitude and frequency spectrum analysis, generator set status signal collection and analysis, and torsional oscillation model analysis and safety evaluation. The system comprises three parts of a torsional oscillation amplitude and frequency spectrum analysis module, a generator set status and torque analysis module, and a torsional oscillation model analysis and safety evaluation module. The mechanical quantity and the electrical quantity of the generator set are taken as signals, extracted during oscillation and taken as analysis objects, so that not only are the reliability and the accuracy of the signals are enhanced, but also subsynchronous oscillation of the generator set can be deeply analyzed on the basis of detection signals, the oscillation frequency, amplitude and reason of the generator set, and the temperature, the torsional stress, the deformation and the loss accumulation of shafting can be comprehensively analyzed, and good foundation work is laid for a subsequent restrain system.

Description

technical field [0001] The present invention relates to detection and analysis of oscillation signals of generator sets, in particular to a method and system for detection and analysis of subsynchronous oscillation signals of large generator sets. Background technique [0002] Due to the uneven distribution of energy sources in my country, a power pattern of "power transmission from west to east" has been formed. This method of using series compensation capacitors for large-capacity and long-distance power transmission makes the subsynchronous oscillation of large generator sets a prominent problem in power systems. [0003] Subsynchronous oscillation belongs to the oscillation instability of the system, which is caused by a special electromechanical coupling in the power system. The greatest harm of subsynchronous oscillation is that it may cause serious damage to the rotor shafting of large turbogenerator sets, cause major accidents, and endanger the operation safety of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/34
Inventor 姜建国瞿文慧罗郜登科徐亚军乔树通
Owner SHANGHAI JIAO TONG UNIV
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