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A control method for additional damper of prime mover speed regulating system

A technology of additional damper and speed control system, applied in the direction of control system, control generator, reducing/preventing power oscillation, etc., can solve problems such as ultra-low frequency oscillation, and achieve the effect of improving additional damping

Active Publication Date: 2021-10-15
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 hydraulic generator set in a certain operating mode, the present invention provides a method for controlling the additional damping of the prime mover speed control system. Damping

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  • A control method for additional damper of prime mover speed regulating system
  • A control method for additional damper of prime mover speed regulating system
  • A control method for additional damper of prime mover speed regulating system

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Embodiment Construction

[0049] The specific embodiments of the present invention will be described in further detail below with reference to 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 hydraulic generator set in a certain operation mode, the present invention aims at the characteristics of the generator speed control system and based on the principle of phase compensation, provides a method including a measurement link, a filter An additional damper (GAD) control method for a prime mover speed control system with a link, a dead zone link, a DC blocking link, a three-stage lead-lag compensation link, an amplifying link and an amplitude limiting link, and specifically relates to a principle for suppressing ultra-low frequency oscillation. The realization method of the additional damper (Governor Additional Damper, GAD) of the engine speed control system. The me...

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Abstract

The invention relates to a control method for an additional damper of a prime mover speed control system. The mechanical power affecting the prime mover speed control system is calculated according to a pre-defined prime mover speed control system model, and the mechanical power is decomposed into damping torque and synchronization. Torque component, obtain the additional damping coefficient after compensation under the power closed-loop regulation and speed closed-loop regulation respectively, and determine the damping torque range according to the additional damping coefficient; build the additional damper model of the speed control system, and the phase-frequency characteristics of the speed control system are corresponding The compensation link performs phase compensation to make the additional damping coefficient positive. The ultra-low frequency oscillation damping caused by the speed control system is improved by the above-mentioned inventive solution.

Description

technical field [0001] The invention belongs to the field of electric 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 below 0.1 Hz have appeared in isolated grids and DC island sending systems with a high proportion of hydroelectric 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 occurred in many power systems at home and abroad, which seriously affects the safe and stable operation of the power system and becomes a restrictive link. One of the most ...

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Application Information

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Patent Type & Authority Patents(China)
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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