Power grid regulation and control method and system for restraining low frequency oscillation

A technology of power grid regulation and low-frequency oscillation, which is applied in the field of electric power, can solve the problems of poor suppression effect, power system stability and low safety of generator sets, and achieve the effect of improving stability and suppression efficiency

Active Publication Date: 2014-08-20
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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Problems solved by technology

[0005] Based on this, it is necessary to provide a power grid control method and system for suppressing low-frequency oscillations in view of the above-mentioned os

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  • Power grid regulation and control method and system for restraining low frequency oscillation
  • Power grid regulation and control method and system for restraining low frequency oscillation
  • Power grid regulation and control method and system for restraining low frequency oscillation

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] see figure 1 , figure 1 A schematic flow chart of the first embodiment of the grid regulation method for suppressing low-frequency oscillation according to the present invention.

[0029] The power grid regulation method for suppressing low-frequency oscillation described in this embodiment includes the following steps:

[0030] Step S101, obtaining the state variables of the single-machine infinite system.

[0031] Step S102, convert the obtained state variables, the preset first weight matrix and second weight matrix, and the preset system state matrix and system control matrix correspo...

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Abstract

The invention discloses a power grid regulation and control method and system for restraining low frequency oscillation. The method includes the steps that a state variable of a single-machine infinite bus system is acquired; the acquired state variable, a preset first weighting matrix, a preset second weighting matrix, a system state matrix and a system control matrix are converted into a transformation matrix through the following formula, wherein the system state matrix and the system control matrix correspond to the single-machine infinite bus system; the transformation matrix, the second weighting matrix and the state variable are converted into an optimum controlled variable; the optimum controlled variable is used as a feedback controlled variable to conduct feedback regulation and control over an infinite power grid. By the adoption of the method and system, the restraining efficiency of low frequency oscillation is improved, meanwhile, abrasion to power grid equipment can be lowered, so that optimum control is achieved, and the stability of an electric power system and the security of a generator set are effectively improved.

Description

technical field [0001] The present invention relates to the technical field of electric power, in particular to a power grid regulation method and system for suppressing low-frequency oscillations. Background technique [0002] The negative damping provided by the power system offsets the original positive damping of the system motor, excitation winding, machinery, etc., which will cause the total damping to be too small or negative. At this time, if the power system is disturbed, the disturbance will continue under the action of negative damping. Amplified to form low-frequency oscillations. Low-frequency oscillation will seriously affect the stability of the power system and the safe operation of the generator set, and even cause damage to the power system and lead to large-scale power outages. [0003] The function of the power system stabilizer on the side of the generator speed control system is to generate a positive damping torque through the control of the speed con...

Claims

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Application Information

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IPC IPC(8): H02J3/24
Inventor 朱亚清潘凤萍陈华忠庞志强李军史玲玲
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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