Method and device for judging oscillation damping ratio polarity of generator speed regulating system

A technology of speed regulation system and polarity judgment, which is applied to the control of generators, control of generators through magnetic field changes, and control systems. It can solve problems such as complex calculation formulas, separate analysis and calculation, and unintuitive physical concepts, so as to achieve easy calculation. , the effect of intuitive physical concepts

Active Publication Date: 2017-03-01
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Problems solved by technology

The current method of calculating the damping ratio is to calculate the direct formula from the measured test waveform or the data recorded by the fault recorder. The calculated damping ratio is the total damping ratio of the output characteristics of the entire generator set, including the generator set excitation and speed regulation. The damping of the control system and the sum of mechanical damping; the vibration source location method based on the energy funct

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  • Method and device for judging oscillation damping ratio polarity of generator speed regulating system
  • Method and device for judging oscillation damping ratio polarity of generator speed regulating system
  • Method and device for judging oscillation damping ratio polarity of generator speed regulating system

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Embodiment Construction

[0027] The embodiment of the present invention provides a method and device for judging the polarity of the oscillation damping ratio of the generator speed control system, revealing the relationship between the damping ratio of the generator speed control system and important variables in the small disturbance process, which can be quickly and easily Judging the polarity of the oscillation damping ratio of the generator speed control system not only has an intuitive physical concept, but also the formula is easy to calculate, which is convenient for intuitively judging whether the speed control system provides positive damping to suppress low-frequency oscillations during low-frequency oscillations, or provides negative damping to intensify power oscillations.

[0028] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely ...

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Abstract

The embodiment of the invention discloses a method and a device for judging the oscillation damping ratio polarity of a generator speed regulating system. Starting with an occurrence mechanism of a small disturbance fluctuation process of a generator set, the invention discloses a relation between the damping ratio of the generator speed regulating system and an important variable in the small disturbance process, thereby being capable of judging the oscillation damping ratio polarity of the generator speed regulating system quickly, simply and conveniently, not only having an intuitive physical concept, but also being easy to calculate in formula, and being convenient for visually judging whether the speed regulating system provides positive damping to suppress low-frequency oscillation or provides negative damping to intensify power oscillation in the low-frequency oscillating process.

Description

technical field [0001] The invention relates to the field of generator speed control systems, in particular to a method and device for judging the polarity of an oscillation damping ratio of a generator speed control system. Background technique [0002] At present, extensive research has been carried out on the occurrence mechanism and analysis methods of unit fluctuations at home and abroad, mainly including the traditional negative damping theory and the newly proposed forced oscillation theory. The damping ratio is generally used to evaluate the performance of generating units. Dynamic characteristics and dynamic behavior. The current method of calculating the damping ratio is to calculate the direct formula from the measured test waveform or the data recorded by the fault recorder. The calculated damping ratio is the total damping ratio of the output characteristics of the entire generator set, including the generator set excitation and speed regulation. The damping of...

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Application Information

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IPC IPC(8): H02P9/14H02P101/20
CPCH02P9/14H02P2101/25
Inventor 张俊峰李鹏唐景星赵艳军付聪王钤张跃梅成林
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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