Prime mover speed control system additional damper control method

A technology with additional dampers and speed control systems, applied in control systems, control generators, electrical components, etc., can solve problems such as ultra-low frequency oscillation, and achieve ultra-low frequency oscillation damping improvement, simple application, and suppression of low-frequency oscillation phenomena. Effect

Active Publication Date: 2017-06-30
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology

[0004] In order to solve the problem of ultra-low frequency oscillation caused by the negative damping of the prime mover speed control system, especially the hydrauli...

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  • Prime mover speed control system additional damper control method
  • Prime mover speed control system additional damper control method
  • Prime mover speed control system additional damper control method

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Embodiment Construction

[0049] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0050] In order to solve the problem of ultra-low frequency oscillation caused by the negative damping of the prime mover speed control system, especially the hydroelectric generator set in a certain operating mode, the present invention aims at the characteristics of the generator speed control system, based on the principle of phase compensation, and provides a A control method for the additional damper (GAD) of the prime mover speed regulation system, including a link, a dead zone link, a direct blocking link, a three-stage lead-lag compensation link, an amplification link and a limiting link, specifically relates to a principle for suppressing ultra-low frequency oscillation The implementation method of the additional damper (Governor Additional Damper, GAD) of the engine speed control system. This method can flexibl...

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Abstract

The invention relates to a prime mover speed control system additional damper control method. The mechanical power which affects the prime mover speed control system is calculated according to a pre-defined prime mover speed control system model. The mechanical power is decomposed into damping torque and synchronization torque components, so as to acquire compensated additional damping coefficients under power closed-loop adjustment and rotation speed closed-loop adjustment. According to the additional damping coefficients, the damping torque interval is determined. A speed control system additional damper model is built to carry out phase compensation on a compensation link corresponding to the phase frequency characteristic of the speed control system, so that the additional damping coefficients are positive. According to the invention, ultra-low frequency oscillation damping caused by the speed control system is improved.

Description

technical field [0001] The invention belongs to the field of power systems, and in particular relates to an additional damping control method for a prime mover speed regulating system. Background technique [0002] In recent years, ultra-low frequency oscillations with an oscillation frequency lower than 0.1 Hz have successively appeared in isolated grids and DC island transmission systems with a high proportion of hydropower units. The current speed regulation system brings obvious negative damping while satisfying the rapidity of the primary frequency regulation action of the power grid. Due to the development of power systems, the emergence and expansion of interconnected power systems, and the application of fast automatic excitation regulators and fast excitation systems, low-frequency power oscillations have appeared in many power systems at home and abroad, seriously affecting the safe and stable operation of power systems, and becoming a restrictive contact. It is o...

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Application Information

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IPC IPC(8): H02P9/00H02J3/24H02P101/10
CPCH02J3/24H02P9/008H02P2101/10
Inventor 王官宏李文锋李莹陶向宇艾东平何凤军
Owner CHINA ELECTRIC POWER RES INST
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